{"title":"Automated Orbital Welding Systems","description":"\u003cp class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eFYID-Feiyide is a global leader in\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eAutomated Orbital TIG (GTAW) Welding Systems\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e, providing the 'Precision Surgeon' technology required for high-tech infrastructure. Our comprehensive catalog covers the entire spectrum of orbital joining needs:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ng-star-inserted\"\u003e\n\u003cli class=\"ng-star-inserted\"\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eClosed-Head Orbital Welders (C-Series):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003eThe gold standard for ultra-high purity (UHP) gas and liquid piping in semiconductor and biopharma industries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"ng-star-inserted\"\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eOpen-Head Orbital Welders:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003eVersatile solutions for medium-to-large diameter pipes and thick-walled applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"ng-star-inserted\"\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eU-Bend Tube Welding Machines:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003eSpecialized systems optimized for\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eAI data center liquid cooling modules\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003eand heat exchangers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"ng-star-inserted\"\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eTube-to-Tubesheet \u0026amp; Circular Seam Welders:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003ePrecision-engineered for industrial boiler and condenser fabrication.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003ePowered by our\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eFXT-Series Digital Power Sources\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e, FYID systems ensure 100% weld repeatability, real-time data logging, and seamless integration into\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eIndustry 4.0\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003eworkflows. From micro-instrumentation to heavy-duty energy piping, we deliver the precision your industry demands.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"fxt20-high-purity-closed-chamber-orbital-welding-system-c-series","title":"FYID FXT20 High-Purity Closed Chamber Orbital Welding System (For Semiconductor, Pharma \u0026 Sanitary Tubing)","description":"\u003carticle\u003e\u003c!-- ── 1. PRODUCT DEFINITION ─────────────────────────────────\n     H2: what the machine is + primary use case + tube range\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eClosed-Head Orbital TIG Welder for UHP, Pharmaceutical, and Sanitary Tubing — Φ3.175 mm to Φ168 mm, 0.5 mm to 3 mm Wall\u003c\/h2\u003e\n\u003cp\u003eThe FYID-Feiyide FXT20 is a fully enclosed automatic orbital GTAW (TIG) welding system designed for autogenous (no-filler) single-pass circumferential welds on thin-wall stainless steel, carbon steel, and titanium alloy tube. The system pairs the FXT20 programmable power source (5 A – 200 A DC) with six C-Series enclosed welding heads (C5 through C170), covering tube outer diameters from Φ3.175 mm (⅛\") to Φ168 mm (6.6\") and wall thicknesses from 0.5 mm to 3 mm.\u003c\/p\u003e\n\u003cp\u003eThe C-Series welding head encloses the full tube joint inside a sealed argon chamber during welding. The 360° argon atmosphere prevents atmospheric contamination of both the outer weld surface and the tube inner wall, producing the silver-white oxidation-free weld appearance required by ASME BPE SF1 surface finish classification and SEMI F20 UHP piping standards — without post-weld pickling, passivation, or internal purge line setup.\u003c\/p\u003e\n\u003cp\u003eOne FXT20 power source drives all six C-Series head models interchangeably. A fabrication shop handling multiple tube specifications — from ¼\" instrument tubing to 6\" process headers — operates the full diameter range from a single power source, switching heads in under 10 minutes between jobs.\u003c\/p\u003e\n\u003c!-- ── 2. CORE SPECIFICATIONS ─────────────────────────────────\n     H2: specs + model + tube diameter range\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eFXT20 System Specifications — Power Source and C-Series Welding Head Coverage\u003c\/h2\u003e\n\u003ch3\u003eFXT20 Power Source\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding process\u003c\/td\u003e\n\u003ctd\u003eAutogenous GTAW (TIG) — DC and Pulse modes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current range\u003c\/td\u003e\n\u003ctd\u003e5 A – 200 A DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum arc initiation current\u003c\/td\u003e\n\u003ctd\u003e5 A (suitable for 0.5 mm ultra-thin tube)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuty cycle\u003c\/td\u003e\n\u003ctd\u003e100% at 155 A (forced water-cooling)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e220 V ±10% (AC), single-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput tolerance\u003c\/td\u003e\n\u003ctd\u003e±20% grid fluctuation protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e4.5 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl system\u003c\/td\u003e\n\u003ctd\u003eIndustrial PLC + 10-inch color touchscreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface language\u003c\/td\u003e\n\u003ctd\u003eChinese \/ English switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding zones\u003c\/td\u003e\n\u003ctd\u003eUp to 12 independent segments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStored programs\u003c\/td\u003e\n\u003ctd\u003e200+ groups (Intelligent Expert Parameter Library)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData output\u003c\/td\u003e\n\u003ctd\u003eBuilt-in maintenance-free micro printer; USB export\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eBuilt-in forced water-cooling circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection grade\u003c\/td\u003e\n\u003ctd\u003eIP21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, ISO 9001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eC-Series Enclosed Welding Heads — Tube Diameter Coverage\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eHead model\u003c\/th\u003e\n\u003cth\u003eTube OD range\u003c\/th\u003e\n\u003cth\u003eWall thickness\u003c\/th\u003e\n\u003cth\u003eHead weight\u003c\/th\u003e\n\u003cth\u003ePrimary application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eC5\u003c\/td\u003e\n\u003ctd\u003eΦ6.35 – 12.7 mm (¼\" – ½\")\u003c\/td\u003e\n\u003ctd\u003e0.5 – 1.5 mm\u003c\/td\u003e\n\u003ctd\u003e1.3 kg\u003c\/td\u003e\n\u003ctd\u003eNarrow-space instrument tubing, micro UHP lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC10\u003c\/td\u003e\n\u003ctd\u003eΦ6.35 – 25.4 mm (¼\" – 1\")\u003c\/td\u003e\n\u003ctd\u003e0.5 – 2.0 mm\u003c\/td\u003e\n\u003ctd\u003e1.8 kg\u003c\/td\u003e\n\u003ctd\u003eLaboratory, pharmaceutical process tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC40\u003c\/td\u003e\n\u003ctd\u003eΦ6.35 – 38.1 mm (¼\" – 1.5\")\u003c\/td\u003e\n\u003ctd\u003e0.5 – 2.5 mm\u003c\/td\u003e\n\u003ctd\u003e3.5 kg\u003c\/td\u003e\n\u003ctd\u003eMainstream clean piping, UHP gas cabinet lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC80\u003c\/td\u003e\n\u003ctd\u003eΦ12.7 – 76.2 mm (½\" – 3\")\u003c\/td\u003e\n\u003ctd\u003e0.5 – 3.0 mm\u003c\/td\u003e\n\u003ctd\u003e5.0 kg\u003c\/td\u003e\n\u003ctd\u003eGeneral-purpose sanitary and process tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC120\u003c\/td\u003e\n\u003ctd\u003eΦ19.0 – 114.3 mm (¾\" – 4.5\")\u003c\/td\u003e\n\u003ctd\u003e0.5 – 3.0 mm\u003c\/td\u003e\n\u003ctd\u003e6.5 kg\u003c\/td\u003e\n\u003ctd\u003eLarge-diameter sanitary headers, biopharma CIP lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC170\u003c\/td\u003e\n\u003ctd\u003eΦ50.8 – 168.0 mm (2\" – 6.6\")\u003c\/td\u003e\n\u003ctd\u003e0.5 – 3.0 mm\u003c\/td\u003e\n\u003ctd\u003e9.5 kg\u003c\/td\u003e\n\u003ctd\u003eLarge-bore process and utility tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eIntelligent Expert Parameter Library — one-step setup for qualified tube dimensions\u003c\/h3\u003e\n\u003cp\u003eThe FXT20's onboard Expert Parameter Library stores over 200 pre-qualified welding programs indexed by tube OD and wall thickness. The operator selects tube OD and wall thickness on the 10-inch touchscreen; the system generates a multi-segment welding program covering pre-flow, arc initiation, ramp-up, steady-state, decay, and post-flow phases. For tube dimensions that have been previously qualified on-site, the stored program is recalled in a single step. This eliminates manual parameter calculation between jobs and ensures every production weld replicates the qualified procedure exactly — a requirement for ASME BPE and FDA 21 CFR Part 11 weld procedure documentation.\u003c\/p\u003e\n\u003c!-- ── 3. INDUSTRY APPLICATIONS ───────────────────────────────\n     H2: industries + orbital welding + FXT20\n     Each H3 = one industry, ~280 words\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eIndustry Applications for the FXT20 Closed-Head Orbital Welding System\u003c\/h2\u003e\n\u003ch3\u003eSemiconductor Fabrication — UHP Gas Delivery Lines and Gas Cabinet (BCU) Piping\u003c\/h3\u003e\n\u003cp\u003eSemiconductor fabs operate ultra-high purity (UHP) gas delivery systems that supply process gases — silane, nitrogen trifluoride, hydrogen chloride, and specialty dopant gases — to deposition and etch tools at purities of 99.9999% (6N) or higher. Any contamination introduced at a weld joint — oxidation scale, particulate from weld spatter, or moisture from inadequate argon purging — propagates downstream to the process tool, directly degrading wafer yield. SEMI F20 specifies the maximum allowable particle count and metallic contamination levels at weld joints in UHP gas lines; meeting these specifications with manual TIG welding is not consistently achievable.\u003c\/p\u003e\n\u003cp\u003eThe FXT20's C-Series enclosed head creates a sealed 360° argon atmosphere around the entire weld zone during the weld cycle. The tube inner wall and outer weld surface are protected simultaneously without a separate internal purge line — eliminating the setup time and potential for purge gas flow interruption that are failure modes in manual back-purged TIG. The resulting weld interior is silver-white, oxide-free stainless steel meeting SEMI F20 particle and contamination requirements. For gas cabinet (BCU) prefabrication on EP-grade (electropolished) 316L tubing in ¼\" to 1\" OD, the C5, C10, and C40 heads cover the full diameter range used in standard fab gas delivery infrastructure.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: EP-grade 316L stainless steel, OD Φ6.35 mm – Φ38.1 mm, wall 0.5 mm – 2.5 mm. Relevant standards: SEMI F20, SEMI F57, SEMI C10.\u003c\/p\u003e\n\u003ch3\u003eBiopharmaceutical Manufacturing — ASME BPE Sanitary Piping and GMP Cleanrooms\u003c\/h3\u003e\n\u003cp\u003eBiopharmaceutical and pharmaceutical manufacturing facilities build and qualify sanitary piping systems to ASME BPE (Bioprocessing Equipment) standard, which specifies weld internal surface finish (SF1: Ra ≤ 0.51 µm), weld inspection criteria, and documentation requirements for process contact surfaces in bioreactors, CIP\/SIP systems, water for injection (WFI) loops, and product transfer lines. Every weld joint on a BPE-compliant system is subject to visual borescope inspection and must be documented with a weld map, weld log, and parameter record traceable to the installed weld.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 addresses the three documentation and quality requirements simultaneously. First, the enclosed argon chamber produces SF1-compliant silver-white weld interiors on 316L stainless steel without pickling — pickling with nitric\/hydrofluoric acid is a GMP risk in an operating pharmaceutical facility and is eliminated entirely with enclosed-head orbital welding. Second, the built-in micro printer generates a printed weld report for each joint — current profile, travel speed, arc voltage, and timestamp — that populates the weld log required by ASME BPE and FDA 21 CFR Part 11 for computer-controlled manufacturing records. Third, the 200-group Expert Parameter Library stores qualified WPS parameters for each tube specification on the project, ensuring every production weld is executed identically to the qualified procedure that was submitted for IQ\/OQ\/PQ validation.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: 316L, 304L stainless steel, OD Φ6.35 mm – Φ168 mm, wall 0.5 mm – 3.0 mm. Relevant standards: ASME BPE, FDA 21 CFR Part 11, ISO 14644 cleanroom compatibility.\u003c\/p\u003e\n\u003ch3\u003eFood and Beverage Processing — 3-A Sanitary and FDA-Grade Stainless Tube Welding\u003c\/h3\u003e\n\u003cp\u003eFood and beverage processing facilities — dairy, brewery, beverage filling, and aseptic packaging — build hygienic piping systems to 3-A Sanitary Standards and FDA food contact material requirements. The critical weld quality parameter in food-grade piping is internal surface finish and the absence of crevices, pits, or rough weld beads that create bacterial harbourage points. A weld bead with oxidation scale, pitting, or irregular profile cannot be adequately cleaned by CIP (clean-in-place) circuits, creating a persistent contamination risk that regulatory inspections will flag.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 produces weld beads on 304 and 316L sanitary tube that meet 3-A Standard No. 63-03 internal surface requirements without post-weld mechanical or chemical treatment. The enclosed argon chamber prevents the oxidation that causes the rough, granular \"cauliflower\" weld surface that food-contact inspections reject. For dairy and beverage operations running 24\/7 production with CIP cycles, the 100% duty cycle at 155 A sustains continuous fabrication throughput without cooling breaks. Operator training to production-grade proficiency takes one day — a practical requirement for food processing contractors who cannot allocate extended training cycles on project schedules.\u003c\/p\u003e\n\u003cp\u003eThe FXT20's built-in data printer produces per-weld documentation that supports food safety management system (FSMS) records and HACCP plan documentation for sanitary piping qualification. Compatible tube: 304, 316L stainless steel, OD Φ6.35 mm – Φ168 mm, wall 0.5 mm – 3.0 mm. Relevant standards: 3-A Sanitary Standard No. 63-03, FDA 21 CFR Part 177, EHEDG guidelines.\u003c\/p\u003e\n\u003ch3\u003eAI Data Center Liquid Cooling — Stainless Steel Loop Piping and Heat Exchanger Tube Prefabrication\u003c\/h3\u003e\n\u003cp\u003eHigh-density AI server deployments — GPU clusters running at 300 W to 700 W per chip — require direct liquid cooling (DLC) systems that circulate cooling fluid through server-mounted cold plates and facility heat exchangers. The cooling loop piping in a hyperscale AI data center consists of hundreds to thousands of stainless steel tube joints in ¼\" to 2\" OD, welded in a clean environment to prevent particulate contamination of the cooling fluid that contacts CPU and GPU cold plates. A weld with oxidation scale or particulate generation in a liquid cooling loop degrades thermal interface performance and risks blocking cold plate micro-channels.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 is the correct tool for AI data center liquid cooling loop fabrication for two reasons specific to this application. First, the enclosed argon chamber produces particle-free, oxide-free weld interiors on 316L stainless steel — the same requirement as semiconductor UHP lines, applied to liquid rather than gas service. Second, the system's 5 A minimum arc initiation current handles the thin-wall tube (0.5 mm – 1.5 mm) used in compact cooling manifolds without burn-through, which is a failure mode of conventional orbital welders with higher minimum current floors. For U-bend tube welding in heat exchanger cooling modules, FYID's dedicated \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling\"\u003eU-Bend Tube Orbital Welding System\u003c\/a\u003e extends this capability to socket weld joints in heat exchanger tube bundles.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: 316L stainless steel, OD Φ6.35 mm – Φ38.1 mm (C5–C40 heads), wall 0.5 mm – 2.5 mm. Application: DLC loop piping, manifold prefabrication, cooling distribution units (CDUs).\u003c\/p\u003e\n\u003ch3\u003eAerospace, Hydraulics, and Precision Instrumentation Tubing\u003c\/h3\u003e\n\u003cp\u003eAircraft hydraulic systems, fuel lines, and pneumatic control tubing operate at pressures of 3,000 psi to 5,000 psi on tube in titanium alloy (Grade 2, Grade 5), 316L stainless steel, and Inconel, in OD ranges from ¼\" to 1\". These tube joints are subject to 100% radiographic or X-ray fluorescence inspection, and any weld defect — porosity, lack of fusion, oxidation inclusion — is a rejection. Manual TIG welding on small-diameter titanium and stainless aerospace tube requires a level of operator skill that is difficult to source and impossible to sustain consistently across a production run of hundreds of joints.\u003c\/p\u003e\n\u003cp\u003eThe FXT20's 5 A minimum current and multi-segment program control are specifically suited to thin-wall precision tube in these alloys. For titanium alloy tube, the enclosed argon chamber is not optional — titanium oxidizes rapidly above 400°C, and any atmospheric contamination of the weld zone produces an embrittled, discoloured joint that fails both visual and mechanical inspection. The FXT20's enclosed head provides full inert gas coverage without external trailing shields or glove-box setups. The 200-group parameter library stores qualified procedures for each tube alloy and OD combination on a project, and the built-in printer produces the per-weld documentation required for AS9100 aerospace quality management system records.\u003c\/p\u003e\n\u003cp\u003eCompatible materials: 316L stainless steel, titanium alloy (Grade 2, Grade 5), carbon steel. Compatible OD: Φ3.175 mm – Φ168 mm. Relevant standards: AS9100, AMS 2694 (titanium weld), ASTM A269 (stainless tube).\u003c\/p\u003e\n\u003c!-- ── 4. FAQ ──────────────────────────────────────────────────\n     H2 keyword: FXT20 + common questions\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eFXT20 Closed-Head Orbital Welder — Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between a closed-head and open-head orbital welder, and when do I need the FXT20?\u003c\/h3\u003e\n\u003cp\u003eA closed-head orbital welder (FXT20 + C-Series) encloses the tube joint inside a sealed argon chamber. It is designed for thin-wall tube (0.5 mm – 3 mm wall) requiring oxidation-free autogenous (no-filler) single-pass welds — semiconductor UHP gas lines, pharmaceutical sanitary tube, food-grade stainless, and precision aerospace tubing. It requires access to both ends of the tube to clamp the head in position.\u003c\/p\u003e\n\u003cp\u003eAn open-head orbital welder (\u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt40-pro-industrial-open-head-orbital-welding-system-k-series\"\u003eFXT40 Pro + K-Series\u003c\/a\u003e) clamps externally onto the pipe without pipe-end access. It is designed for heavy-wall industrial pipe (2 mm – 13 mm wall, up to Φ325 mm OD) requiring multi-pass V-groove welding with filler wire — petrochemical pipelines, shipbuilding, and power generation piping.\u003c\/p\u003e\n\u003ch3\u003eDoes the FXT20 require a separate internal argon purge line to achieve oxidation-free weld interiors?\u003c\/h3\u003e\n\u003cp\u003eNo. The C-Series enclosed welding head creates a sealed 360° argon atmosphere around the entire tube joint — including the tube inner wall — during the weld cycle. Internal purge gas is delivered through the welding head's integrated gas channel, not through a separate back-purge connection at the pipe end. This eliminates the setup time, purge gas volume, and potential for purge flow interruption that are risks in manually back-purged TIG welding. The resulting weld interior meets ASME BPE SF1 and SEMI F20 cleanliness requirements without pickling or passivation.\u003c\/p\u003e\n\u003ch3\u003eCan one FXT20 power source drive all six C-Series welding heads?\u003c\/h3\u003e\n\u003cp\u003eYes. One FXT20 power source is compatible with all C-Series heads from C5 (Φ6.35 – 12.7 mm) through C170 (Φ50.8 – 168 mm). Head changeover takes under 10 minutes. The Expert Parameter Library stores independent welding programs for each tube OD and wall thickness combination, so switching from a ¼\" semiconductor tube program to a 4\" sanitary header program requires a single touchscreen selection, not manual recalculation.\u003c\/p\u003e\n\u003ch3\u003eWhat weld documentation does the FXT20 produce for GMP, FDA, and ASME BPE audits?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20's built-in maintenance-free micro printer generates a printed weld report for each joint, including: weld program number, tube OD and wall thickness, current profile (ramp-up, steady-state, decay values by segment), travel speed, arc voltage, pre-flow and post-flow times, and timestamp. Data is also exportable via USB for unlimited archiving. This output directly populates the weld log required by ASME BPE Section MJ, supports FDA 21 CFR Part 11 electronic records requirements, and provides the per-weld parameter traceability required for IQ\/OQ\/PQ qualification in pharmaceutical facility commissioning.\u003c\/p\u003e\n\u003ch3\u003eWhat is the minimum tube wall thickness the FXT20 can weld without burn-through?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20's arc initiates at 5 A — the lowest minimum current in its class — enabling autogenous welding on tube wall thicknesses down to 0.5 mm. The multi-segment program structure controls current independently through arc initiation, ramp-up, steady-state, and decay phases, preventing the heat accumulation that causes burn-through on ultra-thin tube. This low-current capability is specifically required for ¼\" (6.35 mm OD) semiconductor instrument tube in 0.5 mm and 0.65 mm wall, which represents the smallest tube dimension in UHP gas delivery systems.\u003c\/p\u003e\n\u003ch3\u003eHow long does operator training take before the FXT20 can be used in production?\u003c\/h3\u003e\n\u003cp\u003eA general operator without prior TIG certification can reach production-grade proficiency in one day of hands-on training. The Expert Parameter Library generates welding parameters from OD and wall thickness input, eliminating the need for manual parameter development. Basic training covers equipment assembly, head installation and changeover, program selection, arc initiation and termination, and daily maintenance. Advanced training — welding parameter optimization for non-standard tube specifications and PQR (Procedure Qualification Record) support — is available from FYID-Feiyide applications engineers.\u003c\/p\u003e\n\u003c!-- ── 5. CTA (no heading) ─────────────────────────────────── --\u003e\n\u003cp\u003eFor tube specification confirmation, head model selection, or PQR support for ASME BPE or SEMI F20 qualification, contact FYID-Feiyide's applications engineering team. Individual C-Series heads (C5 through C170) are available separately for operations that already operate the FXT20 power source.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"FYID-Feiyide","offers":[{"title":"FXT20+C5","offer_id":50299641463066,"sku":"FYID- FXT-FXT20-C5","price":7675.0,"currency_code":"USD","in_stock":true},{"title":"FXT20+C10","offer_id":50299641495834,"sku":"FYID-FXT-FXT20-C10","price":7675.0,"currency_code":"USD","in_stock":true},{"title":"FXT20+C40（1.5inch）","offer_id":50299641528602,"sku":"FYID-FXT-FXT20-C40","price":7675.0,"currency_code":"USD","in_stock":true},{"title":"FXT20+C80（3inch）","offer_id":50299641561370,"sku":"FYID-FXT-FXT20-C80","price":7675.0,"currency_code":"USD","in_stock":true},{"title":"FXT20+C120（4inch）","offer_id":50299641594138,"sku":"FYID-FXT-FXT20-C120","price":7895.0,"currency_code":"USD","in_stock":true},{"title":"FXT20+C170（6.61inch）","offer_id":52087602151706,"sku":"FYID-FXT-FXT20-C170","price":9869.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/7071\/6698\/files\/closed-orbital-welding-head-stainless-pipe.jpg?v=1776578923"},{"product_id":"fxt40-pro-industrial-open-head-orbital-welding-system-k-series","title":"FYID FXT40 Pro Industrial Open-Head Orbital Welding System (400A Heavy-Duty TIG Welder for Φ20-325mm Pipes)","description":"\u003c!-- ============================================================\n     FYID-Feiyide Product Page Description\n     Product: FXT40 Pro Open-Head Orbital Welding System (K-Series)\n     Paste everything between the section markers into Shopify's\n     product description HTML editor.\n     The FAQPage JSON-LD goes into theme\/layout or a Script Tag app.\n     ============================================================ --\u003e\u003c!-- ── 1. PRODUCT DEFINITION ─────────────────────────────────\n     H2 keyword: what the machine is + primary use case + pipe range\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eOpen-Head Orbital TIG Welder for Heavy-Wall Industrial Pipe — Φ20 mm to Φ325 mm, Up to 13 mm Wall\u003c\/h2\u003e\n\u003cp\u003eThe FYID-Feiyide FXT40 Pro is a 400 A industrial open-head orbital GTAW (TIG) welding system designed for all-position girth welding on large-diameter carbon steel, stainless steel, and titanium alloy pipe. The system pairs the FXT40 Pro digital power source with the K-Series open-head orbital welding clamps (K76 through K325), covering pipe outer diameters from Φ20 mm to Φ325 mm and wall thicknesses from 2 mm to 13 mm.\u003c\/p\u003e\n\u003cp\u003eUnlike enclosed welding heads that require pipe-end access, the K-Series open-head clamp mounts externally onto the pipe at any accessible point along its length — making it the correct tool for in-situ manifold joints, skid-mounted piping, shipboard piping systems, and any application where both pipe ends are not free. The welding head rotates around the stationary pipe, completing a full 360° girth weld with programmable parameter control at every position: flat (1G\/1F), horizontal (2G), vertical (3G), and overhead (4G).\u003c\/p\u003e\n\u003cp\u003eThe FXT40 Pro is controlled by a Siemens S7-200 SMART V3.0 PLC — an industrial-grade control platform specified for critical environments including nuclear auxiliary piping, shipbuilding, and high-pressure petrochemical pipelines where arc stability under variable grid conditions is a fabrication requirement, not a preference.\u003c\/p\u003e\n\u003c!-- ── 2. CORE SPECIFICATIONS ─────────────────────────────────\n     H2 keyword: specs + model + pipe diameter\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eFXT40 Pro System Specifications — Power Source and K-Series Welding Heads\u003c\/h2\u003e\n\u003ch3\u003eFXT40 Pro Power Source\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding process\u003c\/td\u003e\n\u003ctd\u003eGTAW (TIG) — DC and Pulse modes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current range\u003c\/td\u003e\n\u003ctd\u003e10 A – 400 A DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuty cycle\u003c\/td\u003e\n\u003ctd\u003e315 A at 100% \/ 400 A at 60% (40°C ambient)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOpen circuit voltage\u003c\/td\u003e\n\u003ctd\u003e70 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e380 V ±10%, 50\/60 Hz, three-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e21.5 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl system\u003c\/td\u003e\n\u003ctd\u003eSiemens S7-200 SMART V3.0 PLC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHMI display\u003c\/td\u003e\n\u003ctd\u003e10-inch color LCD touchscreen, Chinese\/English\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding zones\u003c\/td\u003e\n\u003ctd\u003eUp to 8 independent zones × 8 stages per zone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStored programs\u003c\/td\u003e\n\u003ctd\u003e50 groups (200 positions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorch cooling\u003c\/td\u003e\n\u003ctd\u003eCirculating water, 15 L water tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire feeder spool\u003c\/td\u003e\n\u003ctd\u003eUp to 15 kg; wire diameter 0.8 \/ 1.0 \/ 1.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e−10°C to +40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection grade\u003c\/td\u003e\n\u003ctd\u003eIP21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMachine weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 108 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L×W×H)\u003c\/td\u003e\n\u003ctd\u003e1050 × 480 × 1070 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, ISO 9001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eK-Series Open-Head Orbital Welding Clamps — Pipe Diameter Coverage\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eHead model\u003c\/th\u003e\n\u003cth\u003ePipe OD range\u003c\/th\u003e\n\u003cth\u003eMax wall thickness\u003c\/th\u003e\n\u003cth\u003eTypical application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eK76\u003c\/td\u003e\n\u003ctd\u003eΦ20 – 76 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003eInstrument tubing, small-bore process pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK114\u003c\/td\u003e\n\u003ctd\u003eΦ25 – 114 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003eGas skid manifolds, chemical process pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK168\u003c\/td\u003e\n\u003ctd\u003eΦ60 – 168 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003ePetrochemical piping, boiler headers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK219\u003c\/td\u003e\n\u003ctd\u003eΦ114 – 219 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003eShipbuilding, nuclear auxiliary pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK273\u003c\/td\u003e\n\u003ctd\u003eΦ133 – 273 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003ePower station piping, large-bore industrial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK325\u003c\/td\u003e\n\u003ctd\u003eΦ159 – 325 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003eTransmission pipeline, structural piping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWelding process capabilities\u003c\/h3\u003e\n\u003cp\u003eThe FXT40 Pro supports autogenous (no-filler) root passes and wire-feed fill and cap passes in the same program sequence. For pipe wall thicknesses above 2.5 mm, V-groove preparation (single bevel ≥37° for carbon steel, ≥45° for stainless steel) is required. The system's OSC (oscillation) function executes programmed transverse weaving with independently adjustable left and right dwell times for consistent cap weld width and edge tie-in. AVC (Automatic Arc Voltage Control) maintains torch standoff height in real time throughout each rotation — compensating for pipe surface variation and gravitational effects on the weld pool in overhead and vertical positions.\u003c\/p\u003e\n\u003c!-- ── 3. INDUSTRY APPLICATIONS ───────────────────────────────\n     H2 keyword: industries + orbital welding\n     Each H3 = one industry, ~280 words each\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eIndustry Applications for the FXT40 Pro Open-Head Orbital Welding System\u003c\/h2\u003e\n\u003ch3\u003ePetrochemical and Oil \u0026amp; Gas Pipeline Fabrication\u003c\/h3\u003e\n\u003cp\u003ePetrochemical plants and oil \u0026amp; gas facilities require girth welds on carbon steel and stainless steel pipe that meet ASME B31.3 (Process Piping) or B31.4\/B31.8 (pipeline) code requirements, with 100% radiographic or ultrasonic inspection on critical service lines. Manual all-position TIG welding on large-diameter heavy-wall pipe is the highest-risk step in petrochemical piping fabrication: overhead and vertical-down passes require sustained physical effort, and welder fatigue directly correlates with inconsistent penetration and failed radiographic inspections.\u003c\/p\u003e\n\u003cp\u003eThe FXT40 Pro's 8-zone programming assigns independent current, travel speed, wire feed, and oscillation parameters to each quadrant of the pipe circumference — replicating the positional adjustments a certified manual welder would make, without the fatigue variable. AVC maintains constant arc length as the head rotates through overhead positions, where arc length variation is the primary cause of lack-of-fusion defects. The result is consistent weld bead geometry from 0° to 360°, with every parameter logged for radiographic record correlation. For high-pressure LPG, gas processing, and refinery unit piping where a single rework cycle adds significant schedule and cost, the FXT40 Pro reduces first-pass rejection rates to below 1% on qualified joint designs.\u003c\/p\u003e\n\u003cp\u003eCompatible pipe materials: carbon steel (API 5L, ASTM A106), stainless steel (304, 316L), duplex stainless steel (2205). Compatible pipe OD: Φ20 mm to Φ325 mm. Wall thickness: 2 mm to 13 mm.\u003c\/p\u003e\n\u003ch3\u003eShipbuilding and Marine Piping Systems\u003c\/h3\u003e\n\u003cp\u003eShipboard piping systems — ballast, fuel, seawater cooling, and power plant piping — present a specific fabrication challenge: welds must be executed in confined compartments, in all positions, on pipe that is fixed in place within the ship structure. A manual TIG welder working in a ship's engine room or pipe alley is constrained by both access geometry and physical fatigue, producing a high variance in weld quality across a large joint count that spans hundreds of welds per vessel.\u003c\/p\u003e\n\u003cp\u003eThe K-Series open-head clamp design addresses the confined-space problem directly. The clamp mounts onto the pipe externally; the operator does not need to reach around or underneath the joint. Once the head is clamped and the program is loaded, the weld cycle runs without operator intervention. For shipbuilding projects that require classification society approval (Lloyd's Register, Bureau Veritas, DNV), the FXT40 Pro's per-weld data logging — current, voltage, travel speed, zone sequence — provides the parameter traceability required for weld procedure qualification records (WPS\/PQR). The system stores 50 programs for instant recall on identical pipe specifications across repeat vessel builds.\u003c\/p\u003e\n\u003cp\u003eThe 315 A at 100% duty cycle rating sustains continuous two-shift production in shipyard environments. Water-cooled torch head prevents thermal shutdown during extended production runs in high-ambient temperature conditions.\u003c\/p\u003e\n\u003ch3\u003ePower Generation — Nuclear Auxiliary Piping and Boiler Systems\u003c\/h3\u003e\n\u003cp\u003eNuclear auxiliary piping systems and power station boiler headers are among the most documentation-intensive welding scopes in industrial fabrication. Every joint must be qualified against ASME Section IX (Welding and Brazing Qualifications), with WPS and PQR documentation that traces material heat numbers, welder or machine qualification, preheat and interpass temperature, and weld parameter records. The Siemens S7-200 SMART PLC in the FXT40 Pro was selected for nuclear and power generation applications specifically because Siemens industrial PLC reliability is recognized in utility-grade quality programs — it is not a generic inverter controller.\u003c\/p\u003e\n\u003cp\u003eThe FXT40 Pro's per-weld parameter logging satisfies the traceability requirements of nuclear auxiliary piping quality programs. Current, travel speed, arc voltage, zone index, and timestamp are recorded for every weld cycle and available for USB export or optional printer output. For boiler economizer and superheater header welds on heavy-wall carbon steel — where preheat, interpass temperature control, and multi-pass sequencing are all specified — the 8-zone × 8-stage programming accommodates the full pass sequence in a single stored program, ensuring each production weld replicates the qualified procedure exactly.\u003c\/p\u003e\n\u003cp\u003eCompatible specifications: ASME Section IX, ASME B31.1 (Power Piping), nuclear quality program documentation support.\u003c\/p\u003e\n\u003ch3\u003eIndustrial Boiler and Pressure Vessel Manufacturing\u003c\/h3\u003e\n\u003cp\u003eBoiler drum headers, pressure vessel nozzle welds, and heat exchanger shell connections involve large-diameter heavy-wall pipe with multi-pass V-groove or U-groove joint designs that require consistent bead-on-bead placement across 8 to 20 passes per joint. Manual TIG on thick-wall boiler pipe is a slow, physically demanding process where each successive fill pass must maintain consistent tie-in to the previous bead — a requirement that becomes progressively harder as the welder fatigues across a multi-pass sequence that can take two to four hours per joint.\u003c\/p\u003e\n\u003cp\u003eThe FXT40 Pro's 8-zone × 8-stage programming structures each pass as a discrete stage within the zone program. Root pass parameters — lower current, slower travel, no oscillation — differ from fill pass parameters (higher current, OSC weaving) and cap pass parameters (wider oscillation, adjusted dwell). All stages execute sequentially in a single program run, and the system's AVC tracking compensates for the changing joint geometry as fill passes build up inside the groove. For ASME VIII pressure vessel fabrication or EN 13445-compliant boiler manufacturing, the FXT40 Pro's documentation output supports the weld traceability required for pressure equipment directive compliance.\u003c\/p\u003e\n\u003ch3\u003eNatural Gas Infrastructure and LPG Skid Fabrication\u003c\/h3\u003e\n\u003cp\u003eLPG vaporizers, pressure regulating stations, and natural gas filtration skid manifolds are fabricated to zero-leak standards — typically 100% radiographic inspection plus hydrostatic pressure testing on every joint. The piping manifolds inside a skid frame present a confined-access all-position welding requirement: joints at the top of the skid frame require overhead welding; joints on the side panels require vertical welding; and the dense manifold layout restricts manual welder positioning between adjacent joints.\u003c\/p\u003e\n\u003cp\u003eA documented deployment of the FXT40 Pro with K114 head at an Indian natural gas engineering firm achieved 99.5% first-pass X-ray yield on LPG vaporizer manifold joints, reducing rework costs from 15% to below 1% of project labor. The K-series clamp's compact external geometry allowed the head to be repositioned between manifold joints inside the assembled skid frame without disassembly. Operator training to production proficiency took 3 days on the 10-inch touchscreen interface. For EPC contractors and skid OEMs building to Indian energy safety codes, ASME B31.3, or PED 2014\/68\/EU, the FXT40 Pro's combination of all-position capability, confined-access head design, and per-weld documentation satisfies both quality and regulatory requirements.\u003c\/p\u003e\n\u003c!-- ── 4. FAQ ──────────────────────────────────────────────────\n     H2 keyword: common questions + product name\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eFXT40 Pro Orbital Welder — Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between the FXT40 Pro and a closed-head orbital welder like the FXT20?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20 with C-Series enclosed heads is designed for thin-wall tube (0.5 mm – 3 mm wall, up to Φ168 mm OD) in sanitary and high-purity applications such as pharmaceutical, food, and semiconductor piping. The enclosed head seals around the tube and provides a 360° argon chamber for oxidation-free welds on stainless steel without back-purging.\u003c\/p\u003e\n\u003cp\u003eThe FXT40 Pro with K-Series open heads is designed for heavy-wall industrial pipe (2 mm – 13 mm wall, Φ20 mm – Φ325 mm OD) in structural, petrochemical, shipbuilding, and power generation applications. The open-head clamp mounts externally and does not require pipe-end access, making it suitable for in-position joints inside assembled structures. Multi-pass V-groove welding with wire feed is the primary process, not autogenous single-pass welding.\u003c\/p\u003e\n\u003ch3\u003eCan the FXT40 Pro weld stainless steel pipe in addition to carbon steel?\u003c\/h3\u003e\n\u003cp\u003eYes. The FXT40 Pro welds carbon steel, stainless steel (304, 316L, duplex 2205), and titanium alloy pipe. For stainless steel pipe above 2.5 mm wall thickness, V-groove preparation with a single bevel angle ≥45° is required. Back-purging with argon is recommended for stainless steel to prevent root-side oxidation — the FXT40 Pro system includes pre-flow and post-flow gas control to protect the weld pool before arc initiation and after arc termination.\u003c\/p\u003e\n\u003ch3\u003eHow does the 8-zone programming system work for all-position pipe welding?\u003c\/h3\u003e\n\u003cp\u003eThe pipe circumference is divided into up to 8 independently programmable zones (e.g., 0°–45° flat, 45°–90° vertical-up, 90°–135° overhead approach, 135°–180° overhead, 180°–225° overhead exit, 225°–270° vertical-down, 270°–315° horizontal, 315°–360° flat return). Each zone carries its own current, travel speed, wire feed rate, OSC oscillation width and dwell, and AVC tracking voltage settings. This allows the system to automatically apply the correct parameters for each position as the head rotates — replicating the adjustments a certified manual welder makes instinctively, but consistently and without fatigue.\u003c\/p\u003e\n\u003ch3\u003eWhat documentation does the FXT40 Pro produce for quality and inspection records?\u003c\/h3\u003e\n\u003cp\u003eThe FXT40 Pro logs welding current, arc voltage, travel speed (degrees and distance), wire feed speed, zone index, and timestamps for every weld cycle. An optional built-in printer produces weld parameter reports on demand. Data is exportable via USB for unlimited archiving. This output supports WPS\/PQR documentation for ASME Section IX qualification, radiographic inspection correlation records, and audit documentation for ISO, GMP, and nuclear quality programs.\u003c\/p\u003e\n\u003ch3\u003eWhat groove preparation is required for the K-Series heads on heavy-wall pipe?\u003c\/h3\u003e\n\u003cp\u003eFor carbon steel pipe above 2.5 mm wall thickness: V-groove, single bevel angle ≥37°, fit-up gap 0 – 0.5 mm, misalignment ≤10% of wall thickness. For stainless steel pipe above 2.5 mm wall thickness: V-groove, single bevel angle ≥45°, same fit-up and alignment tolerances. Pipe below 2.5 mm wall does not require groove preparation for carbon or stainless steel. Groove preparation can be performed with FYID's split-frame pipe cutting and beveling machine for in-situ joint preparation without pipe removal.\u003c\/p\u003e\n\u003ch3\u003eIs the FXT40 Pro suitable for emergency repair welding in the field?\u003c\/h3\u003e\n\u003cp\u003eYes, subject to the pipe OD and wall thickness falling within the K-series head range. The open-head clamp design requires no pipe-end access, making it suitable for in-service pipe that cannot be removed or cut. The system requires 380 V three-phase power input, 15 L of cooling water, and argon supply. For field deployments, portable argon cylinders and a portable three-phase generator are the standard setup. The 10-inch touchscreen allows stored programs to be recalled immediately for pipe sizes that have been previously qualified.\u003c\/p\u003e\n\u003c!-- ── 5. CTA (no heading) ──────────────────────────────────── --\u003e\n\u003cp\u003eFor project-specific pipe diameter coverage, groove design, or multi-pass program support, contact FYID-Feiyide's applications engineering team. Configuration options include individual K-series heads (K76 through K325) with the FXT40 Pro power source, wire feeder, and line controller.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"FYID-Feiyide","offers":[{"title":"K76+FXT40 Pro","offer_id":50299719975194,"sku":"FYID- FXT-FXT40 Pro-K76","price":16278.0,"currency_code":"USD","in_stock":true},{"title":"K114+FXT40 Pro","offer_id":50299720007962,"sku":"FYID- FXT-FXT40 Pro-K114","price":17105.0,"currency_code":"USD","in_stock":true},{"title":"K168+FXT40 Pro","offer_id":51647813189914,"sku":"FYID- FXT-FXT40 Pro-K168","price":18421.0,"currency_code":"USD","in_stock":true},{"title":"K219+FXT40 Pro","offer_id":51647813222682,"sku":"FYID- FXT-FXT40 Pro-K219","price":20364.0,"currency_code":"USD","in_stock":true},{"title":"K325+FXT40 Pro","offer_id":51647813255450,"sku":"FYID- FXT-FXT40 Pro-K325","price":23684.0,"currency_code":"USD","in_stock":true},{"title":"K600+FXT40 Pro","offer_id":51647813288218,"sku":"FYID- FXT-FXT40 Pro-K600","price":30794.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/7071\/6698\/files\/fyid-k-series-open-head-orbital-pipe-welder.jpg?v=1776134956"},{"product_id":"automated-tube-to-tubesheet-welding-system-fxt20-pt80","title":"FYID Automated Tube-to-Tubesheet Orbital Welding System | PT40\/PT80 Heads with FXT20 Digital Power Supply","description":"\u003carticle\u003e\u003c!-- ── 1. PRODUCT DEFINITION ─────────────────────────────────\n     H2: what the machine is + primary use case + tube range\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eAutomated Tube-to-Tubesheet Orbital TIG Welder for Boilers, Heat Exchangers, and Nuclear Equipment — Φ12 mm to Φ38 mm Tube OD, All-Position Autogenous GTAW\u003c\/h2\u003e\n\u003cp\u003eThe FYID-Feiyide PT40 is a purpose-built automated orbital GTAW (TIG) welding head for tube-to-tubesheet seal welds — the circumferential butt-end joint connecting individual heat exchanger or boiler tubes to the tubesheet face. Paired with the FXT20 programmable power source (5 A – 200 A DC), the PT40 forms a complete tube-to-tubesheet automatic welding system covering tube outer diameters from Φ12 mm to Φ38 mm, in carbon steel, stainless steel, and titanium alloy, without filler wire.\u003c\/p\u003e\n\u003cp\u003eThe PT40 welding head weighs 3 kg and measures 300 × 150.5 × 143.5 mm — dimensioned specifically to extend into the tube box of a heat exchanger or boiler drum and reach interior tubesheet joints that are inaccessible to conventional tube-to-tubesheet welding equipment. The elastic collet clamping mechanism completes radial and axial dual positioning in three steps (insert, lever, lock) without manual support, reducing clamping time from the industry norm of 5 minutes to under 30 seconds per joint. A single operator can manage multiple PT40 heads simultaneously on large-tubesheet fabrication runs.\u003c\/p\u003e\n\u003cp\u003eThe DC servo motor drive provides stepless rotation speed from 0.6 rpm to 12 rpm with full closed-loop control — the same drive architecture used in the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling\"\u003eFXT20 Pro-C U-bend system\u003c\/a\u003e — ensuring consistent rotation speed through flat, vertical, and overhead positions without the speed deviation that stepper-motor systems exhibit in overhead passes. The full water-cooled design (gear shaft, turntable, and tungsten electrode holder all water-cooled, flow ≥600 ml\/min) sustains 100 A at 70% duty cycle for extended multi-head production runs without torch degradation.\u003c\/p\u003e\n\u003cp\u003eFor tube-to-tubesheet joints in larger tube diameters (Φ38 mm – Φ80 mm) or applications requiring filler wire or fillet weld geometry, contact FYID-Feiyide's applications engineering team for special welding head and modification kit options.\u003c\/p\u003e\n\u003c!-- ── 2. CORE SPECIFICATIONS ─────────────────────────────────\n     H2: specs + PT40 + FXT20\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003ePT40 + FXT20 System Specifications — Welding Head and Power Source\u003c\/h2\u003e\n\u003ch3\u003ePT40 Tube-to-Tubesheet Welding Head\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable tube OD range\u003c\/td\u003e\n\u003ctd\u003eΦ12 mm – Φ38 mm (outer diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJoint type\u003c\/td\u003e\n\u003ctd\u003eButt-end tube-to-tubesheet, autogenous (no filler wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible materials\u003c\/td\u003e\n\u003ctd\u003eCarbon steel, stainless steel, titanium alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotation speed\u003c\/td\u003e\n\u003ctd\u003e0.6 – 12 rpm (stepless, DC servo)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive type\u003c\/td\u003e\n\u003ctd\u003eFull closed-loop DC servo motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTungsten electrode angle\u003c\/td\u003e\n\u003ctd\u003e7° (for Φ12 – Φ28 mm) \/ 0° (for Φ25 – Φ38 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated welding current\u003c\/td\u003e\n\u003ctd\u003e100 A at 70% duty cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling method\u003c\/td\u003e\n\u003ctd\u003eFull water cooling — gear shaft, turntable, tungsten holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling water flow\u003c\/td\u003e\n\u003ctd\u003e≥600 ml\/min at 0.3 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead weight\u003c\/td\u003e\n\u003ctd\u003e3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead dimensions (L×W×H)\u003c\/td\u003e\n\u003ctd\u003e300 × 150.5 × 143.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping mechanism\u003c\/td\u003e\n\u003ctd\u003e180° handle-triggered elastic collet — 3-step insert\/lever\/lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping time\u003c\/td\u003e\n\u003ctd\u003eUnder 30 seconds per joint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTungsten electrode spec\u003c\/td\u003e\n\u003ctd\u003eWC20 (ceriated) Φ2.4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShielding gas\u003c\/td\u003e\n\u003ctd\u003eArgon (Ar) ≥99.999%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, ISO 9001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFXT20 Power Source (paired with PT40)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current range\u003c\/td\u003e\n\u003ctd\u003e5 A – 200 A DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuty cycle\u003c\/td\u003e\n\u003ctd\u003e100% at 155 A (forced water-cooling)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e220 V ±10% AC, single-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e4.5 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHMI display\u003c\/td\u003e\n\u003ctd\u003e10-inch color touchscreen, Chinese\/English\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding zones\u003c\/td\u003e\n\u003ctd\u003eUp to 12 independent segments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStored programs\u003c\/td\u003e\n\u003ctd\u003e200+ groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData output\u003c\/td\u003e\n\u003ctd\u003eBuilt-in micro printer; USB export\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety protections\u003c\/td\u003e\n\u003ctd\u003eLeakage cutoff, overcurrent at 110% of 200 A, arc initiation failure, water flow alarm, overload shutdown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDual-angle slide base and gas nozzle configuration\u003c\/h3\u003e\n\u003cp\u003eThe PT40 standard configuration includes a 0°\/7° dual-angle slide base and Φ25 mm \/ Φ38 mm dual-specification gas nozzles. Switching between the 7° electrode angle (for Φ12 mm – Φ28 mm tube) and the 0° angle (for Φ25 mm – Φ38 mm tube) requires component replacement — no separate head is needed. This single-head multi-range design covers the full Φ12 mm – Φ38 mm diameter range that represents the mainstream tube size in economizer, superheater, shell-and-tube heat exchanger, and steam generator fabrication, reducing redundant equipment investment in shops that run mixed tube-size production.\u003c\/p\u003e\n\u003c!-- ── 3. INDUSTRY APPLICATIONS ───────────────────────────────\n     H2: industries + tube-to-tubesheet orbital welding\n     H3 per industry, ~280 words each\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eIndustry Applications for the PT40 Tube-to-Tubesheet Automated Welding System\u003c\/h2\u003e\n\u003ch3\u003eIndustrial Boiler Manufacturing — Economizer and Superheater Tube-to-Tubesheet Seal Welds\u003c\/h3\u003e\n\u003cp\u003ePower station and industrial boilers contain economizer and superheater sections where hundreds to thousands of carbon steel tubes are seal-welded to drum headers or tubesheets. These joints operate under continuous thermal cycling at temperatures of 300°C – 600°C and pressures of 5 MPa – 25 MPa, making the tube-to-tubesheet seal weld one of the highest-consequence joints in the boiler assembly. A single failed seal weld causes steam or water leakage into the flue gas path — a shutdown event that in large utility boilers costs operators hundreds of thousands of dollars per day in lost generation capacity.\u003c\/p\u003e\n\u003cp\u003eManual tube-to-tubesheet welding in boiler drums has two persistent quality problems. First, the drum interior geometry forces the welder into constrained positions for tubes in the lower and side tube rows, producing posture-dependent quality variation between the top-of-drum tubes (flat welding, easiest) and the side and bottom tubes (vertical and overhead, most difficult). Second, in large boiler drums with tube counts exceeding 500, weld quality naturally degrades across a shift as operator fatigue accumulates. The PT40's all-position DC servo rotation produces the same weld profile at every tube position regardless of the welder's access angle — the head is inserted and locked into each tube, the program runs automatically, and the operator repositions to the next tube.\u003c\/p\u003e\n\u003cp\u003eThe 30-second elastic collet clamping mechanism sustains production throughput on high-tube-count boiler drums. The 100 A \/ 70% duty cycle water-cooled design supports continuous multi-shift production without thermal degradation. Compatible materials: carbon steel (SA-210, SA-192), stainless steel (SA-213 TP304, TP316). Tube OD Φ12 mm – Φ38 mm. Relevant code: ASME Section I (Power Boilers), EN 12952.\u003c\/p\u003e\n\u003ch3\u003eShell-and-Tube Heat Exchanger Fabrication — All-Position Tube-to-Tubesheet Seal Welding\u003c\/h3\u003e\n\u003cp\u003eShell-and-tube heat exchangers in petrochemical, refinery, and chemical process service are fabricated to ASME Section VIII Div. 1, TEMA, or GB\/T 151, all of which require tube-to-tubesheet joints to be either expanded, seal-welded, or both (strength-welded). For services where tubesheet joints must be leak-tight under process pressure — high-pressure hydrocarbon service, toxic fluid service, or high-differential-pressure designs — seal welding is mandatory. In a typical process heat exchanger with 200 to 600 tubes, the seal welding scope represents the single largest welding labor input in the fabrication sequence.\u003c\/p\u003e\n\u003cp\u003eThe PT40 reduces the labor variable in this scope to head positioning and program selection. Once the program for a given tube OD and material is stored in the FXT20's 200-group parameter library, every production weld in that specification is executed identically — current profile, rotation speed, pre-flow, post-flow — with no operator-to-operator or shift-to-shift variation. The FXT20's built-in printer generates a weld report for each joint, creating the per-tube weld record that supports ASME Section VIII Manufacturer's Data Report documentation and third-party inspection sign-off. For heat exchangers in lethal service (ASME Section VIII UW-2), where full radiographic inspection of all welds is mandatory, the PT40's weld consistency directly reduces radiographic rejection rates and re-weld scope.\u003c\/p\u003e\n\u003cp\u003eCompatible tube OD: Φ12 mm – Φ38 mm. Materials: carbon steel, stainless steel (304, 316L), duplex stainless (2205), titanium alloy. Relevant standards: ASME Section VIII Div. 1, TEMA C\/B\/R, GB\/T 151.\u003c\/p\u003e\n\u003ch3\u003eNuclear Power Equipment — Steam Generator Tube-to-Tubesheet Precision Welding\u003c\/h3\u003e\n\u003cp\u003eNuclear steam generators contain tens of thousands of thin-wall Alloy 600 or Alloy 690 tubes seal-welded to the primary-side tubesheet. These joints are among the most safety-critical welds in nuclear power plant construction: they form the boundary between primary coolant (radioactive) and secondary steam, and any through-wall defect is a radiological release pathway. Nuclear steam generator tube-to-tubesheet welding is qualified under ASME Section III (Nuclear Components) with WPS\/PQR documentation, weld record traceability to tube heat number and tubesheet location, and 100% inspection by either liquid penetrant or eddy current.\u003c\/p\u003e\n\u003cp\u003eThe PT40's DC servo closed-loop drive and full water-cooled design were selected for nuclear applications because they eliminate the two primary sources of weld variability in this joint: rotation speed deviation across the full 360° (addressed by servo closed-loop) and torch degradation from thermal cycling across a high-count production run (addressed by full water cooling). The FXT20's per-weld data logging — current, rotation speed, arc voltage, zone index, timestamp — produces the weld parameter traceability record required by nuclear quality programs (10 CFR 50 Appendix B, ASME NQA-1). For nuclear auxiliary piping girth welds rather than tube-to-tubesheet joints, see the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt40-pro-industrial-open-head-orbital-welding-system-k-series\"\u003eFXT40 Pro with K-series heads\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCompatible materials: Alloy 600, Alloy 690, 316L stainless steel, carbon steel. Tube OD Φ12 mm – Φ38 mm. Relevant standards: ASME Section III, ASME Section IX, NQA-1, 10 CFR 50 Appendix B.\u003c\/p\u003e\n\u003ch3\u003eChemical and Petrochemical Reactor Equipment — Corrosion-Resistant Tube-to-Tubesheet Welding\u003c\/h3\u003e\n\u003cp\u003eShell-and-tube condensers, reboilers, and reactor feed\/effluent exchangers in chemical and petrochemical service often use corrosion-resistant tube materials — titanium Grade 2, duplex stainless steel 2205, or high-alloy stainless — to resist process-side corrosion from acids, chlorides, or hydrogen sulfide. These alloys are significantly more sensitive to heat input variation than carbon steel: titanium requires full inert gas coverage during welding (atmospheric oxygen contact above approximately 400°C produces embrittlement), and duplex stainless requires controlled heat input to maintain the austenite-ferrite phase balance that provides its corrosion resistance.\u003c\/p\u003e\n\u003cp\u003eThe PT40's programmable multi-segment current control allows the FXT20 to ramp current precisely through arc initiation, steady-state, and decay phases on each pass — maintaining heat input within the narrow process window for duplex stainless phase balance and providing the pre-flow and post-flow argon timing that titanium requires. For titanium tube-to-tubesheet joints, the argon shielding volume provided by the PT40 head covers the weld zone during the full cycle. The 3 kg head weight allows one operator to manage multiple heads on large-bundle condensers without the ergonomic fatigue that conventional 8 kg – 15 kg bore welding heads impose on operators working inside vessel shells.\u003c\/p\u003e\n\u003cp\u003eCompatible materials: titanium Grade 2, duplex stainless 2205, 316L, 904L. Tube OD Φ12 mm – Φ38 mm. Relevant standards: ASME Section VIII, ASME B31.3, API 660 (shell-and-tube heat exchangers).\u003c\/p\u003e\n\u003ch3\u003eAir Conditioning and Refrigeration — Evaporator and Condenser Tube Bundle Seal Welding\u003c\/h3\u003e\n\u003cp\u003eLarge-tonnage water-cooled chillers and industrial refrigeration systems use flooded evaporators and shell-and-tube condensers where copper-nickel, titanium, or stainless steel tubes are expanded and seal-welded into carbon steel or stainless steel tubesheets. In high-efficiency chiller designs for district cooling, process cooling, and data center chilled water plant, the tube count per heat exchanger ranges from 200 to over 1000 tubes, all requiring individual tube-to-tubesheet seal welds.\u003c\/p\u003e\n\u003cp\u003eFor stainless steel tube-in-stainless tubesheet applications in this sector — driven by the shift to refrigerants with higher operating pressures (R-32, R-454B, R-744) that demand stronger tube materials — the PT40 provides the same consistent seal weld quality across a 1000-tube bundle that it provides on a 50-tube laboratory heat exchanger. The 30-second clamping cycle means a single operator can complete a 500-tube bundle in a structured production schedule without the fatigue accumulation that would progressively degrade manual weld quality across the same scope. For the U-bend return joints in U-tube bundle evaporators rather than straight tube-to-tubesheet connections, see the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling\"\u003eFXT20 Pro-C U-bend orbital welder\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: stainless steel (304, 316L), titanium Grade 2. Tube OD Φ12 mm – Φ38 mm. Relevant standards: ASHRAE 15, ASME Section VIII, EN 378.\u003c\/p\u003e\n\u003c!-- ── 4. FAQ ──────────────────────────────────────────────────\n     H2: tube-to-tubesheet orbital welder common questions\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003ePT40 Tube-to-Tubesheet Orbital Welder — Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat tube diameters does the PT40 cover, and does it require a separate head for each diameter?\u003c\/h3\u003e\n\u003cp\u003eThe PT40 covers tube outer diameters from Φ12 mm to Φ38 mm in a single head. The standard configuration includes a 0°\/7° dual-angle slide base and Φ25 mm \/ Φ38 mm dual-specification gas nozzles. Tubes from Φ12 mm to Φ28 mm use the 7° electrode angle; tubes from Φ25 mm to Φ38 mm use the 0° electrode angle. Switching between diameter ranges requires component replacement within the same head — no separate PT40 unit is needed for the full Φ12 mm – Φ38 mm range. For tube OD above Φ38 mm (up to Φ80 mm), special welding heads or modification kits are available on request.\u003c\/p\u003e\n\u003ch3\u003eHow does the PT40 access tube-to-tubesheet joints inside a boiler drum or heat exchanger shell?\u003c\/h3\u003e\n\u003cp\u003eThe PT40 head measures 300 × 150.5 × 143.5 mm and weighs 3 kg — designed to pass through the manway or access opening of a boiler drum or heat exchanger shell and extend to interior tubesheet tube rows. The 180° handle-triggered elastic collet clamps radially and axially into the tube socket in under 30 seconds without manual support. The FXT20 power source connects via 8-metre standard flexible cables, giving the operator a full working radius from the access point. For very large drums where cable length is a constraint, longer cable options are available on request.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between the PT40 tube-to-tubesheet welder and the FXT20 Pro-C U-bend welder?\u003c\/h3\u003e\n\u003cp\u003eThe PT40 performs butt-end tube-to-tubesheet welds — the joint where the tube end face meets the tubesheet face. The tube is inserted through the tubesheet hole (flush or slightly proud of the tubesheet face) and the weld runs circumferentially around the tube end, joining tube to tubesheet. This is the standard seal weld geometry in boilers, shell-and-tube heat exchangers, and steam generators.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling\"\u003eFXT20 Pro-C with C12–C25 U-bend heads\u003c\/a\u003e performs socket fillet welds between an inserted U-bend tube and a straight tube — the return-bend joint geometry in U-tube bundle heat exchangers and liquid cooling manifolds. These are different joint geometries requiring different head designs and are not interchangeable.\u003c\/p\u003e\n\u003ch3\u003eDoes the PT40 require filler wire for tube-to-tubesheet seal welds?\u003c\/h3\u003e\n\u003cp\u003eNo. The PT40 is designed for autogenous (no-filler) tube-to-tubesheet seal welds, where the weld is formed entirely by melting the base metal of the tube and tubesheet face. This is the standard process for seal welds in heat exchangers and boilers where the tube is expanded into the tubesheet hole (strength from expansion) and the weld provides sealing rather than structural load-carrying. For applications requiring filler-wire strength welds or fillet weld geometry, contact FYID-Feiyide's applications team for special head configurations.\u003c\/p\u003e\n\u003ch3\u003eWhat weld documentation does the PT40 + FXT20 system produce for ASME and nuclear quality programs?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20 power source logs current, rotation speed, arc voltage, zone index, and timestamp for every weld cycle. The built-in micro printer generates a printed weld report per joint on demand; USB export enables unlimited data archiving. This output supports: ASME Section I and Section VIII Manufacturer's Data Report weld records, ASME Section III nuclear component documentation, NQA-1 and 10 CFR 50 Appendix B traceability requirements, and per-tube weld records for boiler and heat exchanger third-party inspection sign-off. The 200-group parameter library ensures every production weld replicates the qualified WPS parameters exactly.\u003c\/p\u003e\n\u003ch3\u003eHow long does clamping and setup take per tube joint, and how many joints can one operator complete per shift?\u003c\/h3\u003e\n\u003cp\u003eThe elastic collet clamping mechanism completes radial and axial positioning in under 30 seconds per joint — three steps (insert, lever, lock) without manual support or adjustment tools. Once the program is selected for the tube specification, the weld cycle runs automatically. On a standard boiler tube-to-tubesheet run with Φ25 mm carbon steel tube, one operator with one PT40 head typically completes 80 to 120 joints per 8-hour shift, including clamping, weld cycle, head removal, and repositioning time. With two PT40 heads running from a single FXT20 power source (in sequence), throughput increases proportionally.\u003c\/p\u003e\n\u003c!-- ── 5. CTA (no heading) ─────────────────────────────────── --\u003e\n\u003cp\u003eFor tube OD confirmation, tubesheet layout review, or WPS\/PQR support for ASME Section I, Section VIII, or Section III qualification, contact FYID-Feiyide's applications engineering team. The PT40 welding head is available individually for operations already running the FXT20 power source. Special head configurations for tube OD Φ38 mm – Φ80 mm, filler wire welding, or non-standard tubesheet geometries are available on request with a 15–20 working day lead time.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"FYID-Feiyide","offers":[{"title":"FXT20+PT40","offer_id":50301939679514,"sku":"FYID-FXT-FXT20-PT40","price":8114.0,"currency_code":"USD","in_stock":true},{"title":"FXT40 Pro +PT80","offer_id":50301939712282,"sku":"FYID-FXT-FXT40-PT80","price":15350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/7071\/6698\/files\/pt40_welding_torch.jpg?v=1776578484"},{"product_id":"automatic-turntable-ring-seam-welder-positioner-mechanical-rotary-holder-table-for-convenient-table-rotation","title":"FYID Precision Circular Seam TIG Welding Lathe — Pipe, Flange \u0026 Tank Girth Welds, Φ20–400 mm","description":"\u003c!-- ============================================================\n     FYID-Feiyide Product Page Description\n     Product: HFZB50 Precision Circular Seam Welding Lathe\n              (Circumferential Seam Welding System)\n\n     IMPORTANT — ALSO CHANGE THESE FIELDS IN SHOPIFY:\n\n     Product Title:\n       FYID Precision Circular Seam Welding Lathe — Pipe, Flange\n       \u0026 Tank Girth Welds, Φ20–400 mm, TIG Auto System\n\n     Page Title (SEO):\n       FYID Precision Circular Seam TIG Welding Lathe |\n       Pipe, Flange \u0026 Cylinder Girth Welds | Φ20–400 mm\n\n     Meta Description (148 chars):\n       Automatic TIG circumferential seam welding lathe for pipe-\n       to-flange, pipe-to-pipe, and cylinder girth welds. Φ20–400mm,\n       200kg load, servo drive, 400A. Petrochemical, pressure vessel,\n       HVAC.\n\n     URL: keep existing (already indexed, do not change)\n\n     Paste everything inside \u003carticle\u003e...\u003c\/article\u003e into Shopify\n     product description HTML editor.\n     FAQPage JSON-LD goes into theme\/layout\/theme.liquid before\n     \u003c\/head\u003e, or via Script Tag app scoped to this product URL.\n     ============================================================ --\u003e\n\n\u003carticle\u003e\n\n\u003c!-- 1. PRODUCT DEFINITION --\u003e\n\u003ch2\u003ePrecision Circular Seam TIG Welding Lathe for Pipe-to-Flange, Pipe-to-Pipe, and Cylindrical Tank Girth Welds — Φ20 mm to Φ400 mm, Up to 200 kg Workpiece\u003c\/h2\u003e\n\n\u003cp\u003eThe FYID-Feiyide HFZB50 is a horizontal automatic TIG (GTAW) circumferential seam welding lathe designed for 360° girth weld automation on cylindrical workpieces: pipe-to-flange joints, pipe-to-pipe butt joints, pipe-to-elbow connections, and cylindrical vessel shell seams. The workpiece rotates on a self-centering three-jaw chuck driven by a precision servo motor; the welding torch is stationary, positioned at the top of the joint. This workpiece-rotates \/ torch-stationary configuration produces consistent arc length, travel speed, and heat input throughout the full circumferential weld — eliminating the positional variation that manual TIG introduces as the welder repositions around the joint.\u003c\/p\u003e\n\n\u003cp\u003eThe system covers workpiece outer diameters from Φ20 mm to Φ400 mm, workpiece length up to 800 mm, and maximum workpiece weight of 200 kg. The 365 mm through-hole in the rotating headstock accommodates pipe extending beyond the chuck face, enabling welding of long pipe spools without workpiece length constraints. The welding power source delivers up to 400 A with full multi-pass program control — root pass, fill pass, and cap pass in a single stored program — covering wall thicknesses from below 3 mm (no groove required) through heavy-wall pipe requiring V-groove or U-groove preparation.\u003c\/p\u003e\n\n\u003cp\u003eFor orbital welding on fixed pipe where workpiece rotation is not possible — in-situ pipeline joints, skid manifolds, or shipboard piping — the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt40-pro-industrial-open-head-orbital-welding-system-k-series\" title=\"FXT40 Pro Open-Head Orbital Welder\"\u003eFXT40 Pro with K-series open-head clamps\u003c\/a\u003e rotates the torch around the stationary pipe. The HFZB50 lathe and the FXT40 Pro are complementary systems for different joint access conditions.\u003c\/p\u003e\n\n\n\u003c!-- 2. CORE SPECIFICATIONS --\u003e\n\u003ch2\u003eHFZB50 System Specifications — Welding Lathe and Control System\u003c\/h2\u003e\n\n\u003ch3\u003eMechanical and workpiece parameters\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWorkpiece OD range\u003c\/td\u003e\n\u003ctd\u003eΦ20 mm – Φ400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum workpiece length\u003c\/td\u003e\n\u003ctd\u003e800 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum workpiece weight\u003c\/td\u003e\n\u003ctd\u003e200 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeadstock through-hole diameter\u003c\/td\u003e\n\u003ctd\u003e365 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChuck \/ fixture diameter\u003c\/td\u003e\n\u003ctd\u003e600 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRotation speed range\u003c\/td\u003e\n\u003ctd\u003e0.1 – 4 rpm (stepless, servo motor)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRotation drive\u003c\/td\u003e\n\u003ctd\u003eServo motor + hypoid reducer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTorch position\u003c\/td\u003e\n\u003ctd\u003eFixed, vertically above the joint (12 o'clock)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTorch vertical travel\u003c\/td\u003e\n\u003ctd\u003e550 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTorch horizontal (cross-slide) travel\u003c\/td\u003e\n\u003ctd\u003e1,300 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArc length (AVC) stroke\u003c\/td\u003e\n\u003ctd\u003e±40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTorch oscillation (OSC) angle\u003c\/td\u003e\n\u003ctd\u003e±30°\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e−10°C to +50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMachine colour\u003c\/td\u003e\n\u003ctd\u003eStandard white + blue (RAL custom available)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWelding power source\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWelding process\u003c\/td\u003e\n\u003ctd\u003eTIG (GTAW) — DC and Pulse modes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput current range\u003c\/td\u003e\n\u003ctd\u003e4 A – 400 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated duty cycle\u003c\/td\u003e\n\u003ctd\u003e60% at 400 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eControl method\u003c\/td\u003e\n\u003ctd\u003eIGBT inverter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003e380 V ±10%, three-phase, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated input power\u003c\/td\u003e\n\u003ctd\u003e13.2 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInsulation class\u003c\/td\u003e\n\u003ctd\u003eH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProtection grade\u003c\/td\u003e\n\u003ctd\u003eIP23\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWelding torch\u003c\/td\u003e\n\u003ctd\u003eJJT400 water-cooled TIG torch, 300 A at 100% duty cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum argon flow\u003c\/td\u003e\n\u003ctd\u003e25 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWire feeder wire diameter\u003c\/td\u003e\n\u003ctd\u003eΦ1.0 mm \/ Φ1.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWire feed speed range\u003c\/td\u003e\n\u003ctd\u003e100 – 1,800 mm\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWire spool capacity\u003c\/td\u003e\n\u003ctd\u003eΦ300 mm, up to 20 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eJJ-KZ01 integrated welding control system\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eControl platform\u003c\/td\u003e\n\u003ctd\u003ePLC + CPU hybrid (XINJIE \/ Omron \/ Schneider)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHMI display\u003c\/td\u003e\n\u003ctd\u003e10-inch colour touchscreen, Chinese\/English\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStored programs\u003c\/td\u003e\n\u003ctd\u003e200 groups, 4 zones per program\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePulse frequency\u003c\/td\u003e\n\u003ctd\u003e0.5 – 50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePre-gas \/ post-gas time\u003c\/td\u003e\n\u003ctd\u003e0.1 – 10 s \/ 0.1 – 30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePre-melt current \/ time\u003c\/td\u003e\n\u003ctd\u003e5 – 400 A \/ 0.1 – 10 s\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent decay time\u003c\/td\u003e\n\u003ctd\u003e0.1 – 60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAVC arc voltage tracking range\u003c\/td\u003e\n\u003ctd\u003e7 – 25 V (TIG)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAVC response speed\u003c\/td\u003e\n\u003ctd\u003e0 – 1,800 mm\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOSC transverse speed\u003c\/td\u003e\n\u003ctd\u003e0 – 1,000°\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOSC edge dwell time\u003c\/td\u003e\n\u003ctd\u003e0 – 9.9 s (left and right independently adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOSC accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1°\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRemote line controller\u003c\/td\u003e\n\u003ctd\u003eIncluded — real-time current, voltage, speed adjustment during welding\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eGroove preparation and fit-up requirements\u003c\/h3\u003e\n\u003cp\u003eWall thickness below 3 mm: no groove required. Wall thickness above 3 mm: V-groove required — single bevel angle 30° to 37.5° for standard carbon and stainless steel (U-groove optional for heavy-wall). Double V-groove for pipe-to-pipe joints in heavy-wall configurations. Fit-up gap must be less than 2% of the root face wall thickness. Joint end faces must be machined with a pipe beveling machine — hand grinding does not produce the perpendicularity and surface finish required for automatic TIG with consistent penetration. Weld bead reinforcement height (cap weld): ≤1.6 mm above the pipe surface.\u003c\/p\u003e\n\n\n\u003c!-- 3. INDUSTRY APPLICATIONS --\u003e\n\u003ch2\u003eIndustry Applications for the HFZB50 Circumferential Seam Welding Lathe\u003c\/h2\u003e\n\n\u003ch3\u003ePetrochemical and Industrial Pipeline Fabrication — Pipe-to-Flange and Pipe Spool Girth Welds\u003c\/h3\u003e\n\u003cp\u003ePipe spool fabrication for petrochemical plants, refineries, and industrial piping systems involves large volumes of pipe-to-flange and pipe-to-pipe girth welds in carbon steel and stainless steel, in pipe OD ranges from 2\" (Φ50 mm) to 16\" (Φ400 mm). In a spool fabrication shop producing 50 to 200 spool assemblies per week, the circumferential seam weld — not the fit-up or pre-weld inspection — is the throughput bottleneck. Manual TIG welding on pipe-to-flange joints requires the welder to continuously reposition around the stationary joint for the root pass, then again for each fill and cap pass, accumulating fatigue and introducing positional variation in the overhead and vertical passes.\u003c\/p\u003e\n\u003cp\u003eThe HFZB50 eliminates repositioning entirely: the pipe spool is chucked on the self-centering fixture, the torch is positioned at 12 o'clock, and the full multi-pass weld sequence — root pass parameters in Zone 1, fill pass parameters in Zones 2 and 3, cap pass with OSC weaving in Zone 4 — executes automatically from a single stored program. AVC arc voltage control maintains constant torch standoff throughout the rotation as the weld pool builds up on successive passes. The 200-program storage means the shop can store qualified weld procedures for every recurring pipe-flange specification in their production mix and recall them in one step — no parameter re-entry between jobs.\u003c\/p\u003e\n\u003cp\u003eCompatible materials: carbon steel (A105, A106), stainless steel (304, 316L), alloy steel. Workpiece OD Φ20 mm – Φ400 mm, wall 2 mm and above. Relevant code: ASME B31.3, EN 13480, GB 50235.\u003c\/p\u003e\n\n\u003ch3\u003ePressure Vessel and Industrial Boiler Shell Seam Welding\u003c\/h3\u003e\n\u003cp\u003eCylindrical pressure vessels — storage tanks, separators, reactors, and air receivers — require circumferential shell seams that join rolled shell courses to each other and to dished heads or flanged nozzles. These seams are subject to ASME Section VIII Div. 1 or PED 2014\/68\/EU radiographic inspection requirements: on most pressure vessel categories, full or spot radiography of circumferential seams is mandatory, and the weld profile, reinforcement height, and internal geometry must fall within the code limits to pass.\u003c\/p\u003e\n\u003cp\u003eThe HFZB50's 200 kg chuck capacity and 800 mm workpiece length accommodate shell courses and nozzle assemblies in the small-to-medium pressure vessel range (vessel OD up to Φ400 mm). The 365 mm through-hole allows shell pipe to extend beyond the chuck face without length restriction. For multi-pass shell seam welding, the JJ-KZ01 control system's 4-zone \/ 200-program structure stores the complete weld procedure — root pass, hot pass, fill passes, cap pass with OSC — in a single program that reproduces the qualified procedure identically on every shell seam in the production run. Weld parameter records are available via the control system's data export for inclusion in the vessel Manufacturer's Data Report.\u003c\/p\u003e\n\u003cp\u003eCompatible materials: carbon steel, stainless steel, low-alloy steel. Relevant standards: ASME Section VIII Div. 1, EN 13445, GB 150.\u003c\/p\u003e\n\n\u003ch3\u003eHVAC Equipment Manufacturing — Pipe-to-Elbow and Pipe-to-Header Girth Welds\u003c\/h3\u003e\n\u003cp\u003eHVAC equipment manufacturers — producing air handling unit coil headers, chiller evaporator shells, condensing unit manifolds, and fan coil unit piping assemblies — require high-volume circumferential girth welds on carbon steel and stainless steel pipe in the Φ20 mm to Φ200 mm range. These are typically thin-wall pipe joints (wall 2 mm – 5 mm) in production volumes of hundreds to thousands of joints per week, where manual TIG welding is the throughput constraint and weld quality consistency determines pressure-test pass rates at end-of-line.\u003c\/p\u003e\n\u003cp\u003eThe HFZB50's 0.1 – 4 rpm rotation speed range accommodates both thin-wall small-diameter pipe (faster rotation, lower heat input per unit length) and heavier-wall large-diameter pipe (slower rotation, higher heat input). The self-centering three-jaw chuck handles the range of pipe ODs in an HVAC production mix without fixture changeover for each diameter — chuck adjustment is continuous, not step-indexed. For pipe-to-elbow joints where the elbow geometry prevents chuck clamping on the curved section, the pipe stub is chucked and the elbow is aligned on the free end prior to tack welding and rotation welding. The system's 24\/7 continuous duty capability — water-cooled torch at 300 A, 100% duty cycle — sustains the production throughput requirements of HVAC contract manufacturing environments.\u003c\/p\u003e\n\u003cp\u003eCompatible materials: carbon steel, stainless steel, galvanised steel (bare surface only). Workpiece OD Φ20 mm – Φ400 mm.\u003c\/p\u003e\n\n\u003ch3\u003eChemical Equipment and Custom Fabrication — Tank Nozzle Welds and Specialty Joint Geometry\u003c\/h3\u003e\n\u003cp\u003eChemical process equipment fabricators and custom vessel shops produce a mixed workpiece schedule — reactor nozzles, heat exchanger shell nozzle connections, jacketed vessel inlet fittings, and one-off cylindrical assemblies — where the variety of workpiece diameters and joint configurations makes dedicated fixturing impractical. The HFZB50's self-centering chuck and continuously adjustable rotation speed accommodate this mixed production without retooling between workpieces: the chuck closes onto each new diameter automatically, the torch position is adjusted on the cross-slide, and the stored program for that specification is recalled from the 200-group library.\u003c\/p\u003e\n\u003cp\u003eThe ±30° torch oscillation (OSC) with independently adjustable left and right edge dwell times is specifically useful for nozzle welds where the joint geometry transitions between the nozzle pipe OD and the vessel shell wall — a joint that requires more heat input on the thick shell side and less on the thinner nozzle pipe. OSC dwell time allows the arc to pause on the heavier section for additional fusion before continuing across the joint. The AVC arc voltage control compensates for any surface irregularity or weld pool buildup variation around the circumference, maintaining consistent penetration throughout the rotation.\u003c\/p\u003e\n\u003cp\u003eFor non-round or non-cylindrical workpieces, or for workpiece OD above Φ400 mm, contact FYID-Feiyide's applications engineering team — custom fixture configurations and extended-range rotary positioner options are available on request.\u003c\/p\u003e\n\n\n\u003c!-- 4. FAQ --\u003e\n\u003ch2\u003eHFZB50 Circular Seam Welding Lathe — Frequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between the HFZB50 circumferential seam welding lathe and an orbital welding machine like the FXT40 Pro?\u003c\/h3\u003e\n\u003cp\u003eThe HFZB50 lathe rotates the workpiece past a stationary torch — the pipe, flange, or tank section is chucked on a rotating headstock, and the torch is fixed at the top of the joint. This configuration requires access to both ends of the workpiece and a chuck that can grip the workpiece OD. It is the correct system for shop fabrication of pipe spools, flange assemblies, pressure vessel shells, and tank nozzles where the workpiece can be moved to the machine.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt40-pro-industrial-open-head-orbital-welding-system-k-series\" title=\"FXT40 Pro Open-Head Orbital Welder\"\u003eFXT40 Pro with K-series open-head clamps\u003c\/a\u003e rotates the torch around a stationary pipe — the welding head clamps onto the fixed pipe in the field, and the torch rotates 360° around the joint. This is the correct system for in-situ welds on installed piping, skid manifolds, or shipboard piping where the workpiece cannot be moved. The two systems are complementary: the lathe for shop fabrication, the orbital head for field or in-position welding.\u003c\/p\u003e\n\n\u003ch3\u003eWhat workpiece diameters and joint types does the HFZB50 cover?\u003c\/h3\u003e\n\u003cp\u003eThe self-centering three-jaw chuck accommodates workpiece outer diameters from Φ20 mm to Φ400 mm. Maximum workpiece length is 800 mm; the 365 mm headstock through-hole allows longer pipe to extend beyond the chuck. Maximum workpiece weight is 200 kg. Joint types covered: pipe-to-pipe butt welds (square butt and V-groove), pipe-to-flange welds, pipe-to-elbow welds, and cylindrical shell circumferential seams. The system is not suited to non-round or non-cylindrical workpieces.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the HFZB50 support multi-pass welding on heavy-wall pipe with groove preparation?\u003c\/h3\u003e\n\u003cp\u003eYes. The JJ-KZ01 control system divides the weld sequence into up to 4 zones per program, each with independent current (peak and base in pulse mode), wire feed speed, OSC oscillation parameters, and AVC arc voltage tracking. A typical heavy-wall V-groove program uses Zone 1 for the root pass (no wire feed, lower current), Zones 2 and 3 for fill passes (wire feed active, increased current and OSC width), and Zone 4 for the cap pass (widest OSC, reduced travel speed, adjusted dwell times). All zones execute sequentially in a single program run. 200 programs are stored for recall without re-entry.\u003c\/p\u003e\n\n\u003ch3\u003eWhat groove preparation is required, and can the pipe end be ground rather than machined?\u003c\/h3\u003e\n\u003cp\u003eWall thickness below 3 mm requires no groove — square butt fit-up with gap less than 2% of wall thickness. Wall thickness above 3 mm requires V-groove: single bevel angle 30° – 37.5° for standard carbon and stainless steel; U-groove optional for heavy-wall multi-pass. Double V-groove for pipe-to-pipe heavy-wall joints. End faces must be machined with a pipe beveling machine — hand grinding does not produce the perpendicularity and surface finish uniformity required for automatic TIG with consistent penetration and cap weld profile. FYID-Feiyide's \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/split-frame-pipe-cutting-beveling-machine-clamshell-cold-cutter\" title=\"Split Frame Pipe Beveling Machine\"\u003esplit-frame pipe cutting and beveling machines\u003c\/a\u003e are designed to prepare these joint faces before lathe welding.\u003c\/p\u003e\n\n\u003ch3\u003eWhat documentation does the HFZB50 control system produce for quality records?\u003c\/h3\u003e\n\u003cp\u003eThe JJ-KZ01 control system displays real-time welding current, arc voltage, and travel speed (rotation speed in degrees\/min and linear mm\/min) during each weld cycle. Stored program parameters — all zone settings, pulse parameters, gas timing, wire feed settings — are exportable via the control system's data interface for inclusion in weld procedure documentation, ASME Section VIII Manufacturer's Data Report, or EN pressure vessel quality records. For applications requiring per-weld printed records, an optional printer interface is available.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the lead time for the HFZB50, and is customisation available?\u003c\/h3\u003e\n\u003cp\u003eStandard configuration lead time: contract confirmation plus 1–2 days technical review, then 5–10 working days production scheduling, plus 3–5 working days factory test. Domestic delivery 3–5 days; international sea freight 30–45 days, air freight 10–15 days. Custom configurations — extended workpiece length, non-standard chuck range, alternative control PLC brand (Siemens, Omron, Schneider), or custom machine colour — are available with extended lead times. Pre-delivery factory acceptance testing by the customer is standard practice; FYID-Feiyide notifies the customer upon completion for on-site pre-acceptance inspection. On-site installation, commissioning, and operator training (2–3 persons) are included in the standard delivery scope.\u003c\/p\u003e\n\n\n\u003c!-- 5. CTA (no heading) --\u003e\n\u003cp\u003eFor workpiece dimension confirmation, groove design review, or weld procedure support for ASME Section VIII or EN 13445 compliance, contact FYID-Feiyide's applications engineering team with your workpiece drawing and production volume requirements. Custom chuck configurations for workpiece OD above Φ400 mm or weight above 200 kg are available on request.\u003c\/p\u003e\n\n\u003c\/article\u003e\n\n\n\u003c!-- ============================================================\n     FAQPage JSON-LD Schema\n     Add to theme\/layout\/theme.liquid before \u003c\/head\u003e,\n     or via a Script Tag app scoped to this product URL only.\n     ============================================================ --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the HFZB50 circumferential seam welding lathe and an orbital welding machine?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The HFZB50 lathe rotates the workpiece past a stationary torch — correct for shop fabrication of pipe spools, flange assemblies, and pressure vessel shells where the workpiece can be moved to the machine. The FXT40 Pro orbital welder rotates the torch around a stationary pipe — correct for in-situ welds on installed piping, skid manifolds, or shipboard piping where the workpiece cannot be moved. The two systems are complementary.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What workpiece diameters and joint types does the HFZB50 circumferential seam welder cover?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The self-centering three-jaw chuck covers workpiece outer diameters from 20 mm to 400 mm, maximum workpiece length 800 mm, maximum weight 200 kg. The 365 mm headstock through-hole allows longer pipe to extend beyond the chuck. Joint types: pipe-to-pipe butt welds, pipe-to-flange, pipe-to-elbow, and cylindrical shell circumferential seams.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the HFZB50 support multi-pass welding on heavy-wall pipe with groove preparation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The control system divides the weld sequence into up to 4 zones per program, each with independent current, wire feed, oscillation, and arc voltage tracking parameters. A typical heavy-wall V-groove program sequences root pass, fill passes, and cap pass automatically. 200 programs are stored for recall without re-entry.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What groove preparation is required for the HFZB50?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Wall thickness below 3 mm: no groove required, square butt fit-up, gap less than 2% of wall thickness. Wall thickness above 3 mm: V-groove at 30 to 37.5 degrees single bevel for carbon and stainless steel. End faces must be machined with a pipe beveling machine — hand grinding does not produce the perpendicularity required for consistent automatic TIG penetration.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What documentation does the HFZB50 produce for quality records?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The control system displays real-time current, arc voltage, and travel speed during welding. Stored program parameters are exportable for ASME Section VIII Manufacturer's Data Report, EN pressure vessel quality records, and weld procedure documentation. An optional printer interface is available for per-weld printed records.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the lead time for the HFZB50 and is customisation available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard lead time: 5-10 working days production after contract confirmation, plus 3-5 days factory testing. International sea freight 30-45 days, air freight 10-15 days. Custom configurations including extended workpiece range, alternative PLC brands (Siemens, Omron, Schneider), and non-standard chuck ranges are available with extended lead times. On-site installation and operator training for 2-3 persons is included in the standard delivery scope.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"FYID-Feiyide","offers":[{"title":"Default Title","offer_id":50581311127834,"sku":"FYID-LARGE-PIPE-WELDER","price":18246.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/7071\/6698\/files\/fyid-horizontal-circular-seam-welding-lathe.jpg?v=1776154878"},{"product_id":"u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling","title":"FYID C12–C25 Automated U-Bend Tube Orbital Welding Machine (For AI Data Center Cooling \u0026 Heat Exchanger)","description":"\u003carticle\u003e\u003c!-- ── 1. PRODUCT DEFINITION ─────────────────────────────────\n     H2: what the machine is + primary use case + tube range\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eU-Bend Tube Orbital TIG Welder for AI Data Center Liquid Cooling and Heat Exchanger Tube Bundles — Φ9 mm to Φ25 mm Socket Welds on Combined Wall Thickness ≤1.6 mm\u003c\/h2\u003e\n\u003cp\u003eThe FYID-Feiyide FXT20 Pro-C series is an automated orbital GTAW (TIG) welding system purpose-built for circumferential fillet welds between U-bend tubes and straight tubes — the \"tube-in-tube\" socket joint geometry found in heat exchanger U-tube bundles, AI data center liquid cooling modules, and pharmaceutical double-tube heat exchangers.\u003c\/p\u003e\n\u003cp\u003eThe system pairs the FXT20 Pro programmable power source (5 A – 200 A DC, pulse mode) with the C12, C16, C20, or C25 U-bend welding heads, covering straight tube outer diameters up to Φ12, 16, 20, or 25 mm respectively, with combined socket wall thickness ≤1.6 mm. The welding head's horseshoe-shaped structure requires a minimum tube center spacing of 38 mm (C12\/C16) to 60 mm (C25), fitting within the standard equilateral triangle tube pitch of most shell-and-tube and printed circuit heat exchangers used in data center cooling infrastructure.\u003c\/p\u003e\n\u003cp\u003eThis is not a general-purpose orbital welder adapted for U-bend joints. The FXT20 Pro-C series was designed from the ground up for three failure modes unique to this joint geometry: arc length instability on the inner tube surface during rotation, burn-through on thin combined wall thickness at the socket, and insufficient argon protection of the 316L stainless steel inner wall during overhead passes. Each is addressed by a specific design feature — full closed-loop servo rotation, 5 A minimum arc initiation, and dual-channel integrated argon protection — described in the specifications below.\u003c\/p\u003e\n\u003cp\u003eFor straight-tube girth welds in data center liquid cooling loop piping (not U-bend socket joints), see the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt20-high-purity-closed-chamber-orbital-welding-system-c-series\"\u003eFXT20 with C-Series enclosed heads\u003c\/a\u003e, which covers Φ6.35 mm – Φ168 mm tube OD in thin-wall applications.\u003c\/p\u003e\n\u003c!-- ── 2. CORE SPECIFICATIONS ─────────────────────────────────\n     H2: specs + model + joint geometry\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eFXT20 Pro-C System Specifications — Power Source and U-Bend Welding Head Models\u003c\/h2\u003e\n\u003ch3\u003eFXT20 Pro Power Source\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding process\u003c\/td\u003e\n\u003ctd\u003eAutogenous GTAW (TIG) — DC and Pulse modes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current range\u003c\/td\u003e\n\u003ctd\u003e5 A – 200 A DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum arc initiation current\u003c\/td\u003e\n\u003ctd\u003e5 A (prevents burn-through on ≤1.6 mm combined wall)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent type\u003c\/td\u003e\n\u003ctd\u003eDC \/ Pulse — peak and base current independently adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003e220 V AC ±10% or 110 V AC (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz auto-adaptation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e4.5 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHMI display\u003c\/td\u003e\n\u003ctd\u003e10-inch color touchscreen, Chinese\/English\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding zones\u003c\/td\u003e\n\u003ctd\u003eUp to 8 independent zones per circumferential weld\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStored programs\u003c\/td\u003e\n\u003ctd\u003e200 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData output\u003c\/td\u003e\n\u003ctd\u003eBuilt-in weld parameter printer; USB export\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotation drive\u003c\/td\u003e\n\u003ctd\u003eFull closed-loop servo motor with high-resolution encoder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive response time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;1 ms (eliminates step-loss risk vs. stepper motors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorch cooling\u003c\/td\u003e\n\u003ctd\u003eCirculating water (flow ≥600 ml\/min, 0.3 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard cable length\u003c\/td\u003e\n\u003ctd\u003e8 metres flexible cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, ISO 9001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eC-Series U-Bend Welding Heads — Joint Geometry Requirements\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eHead model\u003c\/th\u003e\n\u003cth\u003eMax straight tube OD\u003c\/th\u003e\n\u003cth\u003eCombined wall thickness\u003c\/th\u003e\n\u003cth\u003eMin tube center spacing\u003c\/th\u003e\n\u003cth\u003eMin straight tube extension\u003c\/th\u003e\n\u003cth\u003eHead weight\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eC12\u003c\/td\u003e\n\u003ctd\u003e≤ Φ12 mm\u003c\/td\u003e\n\u003ctd\u003e≤ 1.6 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 38 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 36 mm from tubesheet face\u003c\/td\u003e\n\u003ctd\u003e1.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC16\u003c\/td\u003e\n\u003ctd\u003e≤ Φ16 mm\u003c\/td\u003e\n\u003ctd\u003e≤ 1.6 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 38 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 36 mm from tubesheet face\u003c\/td\u003e\n\u003ctd\u003e2.0 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC20\u003c\/td\u003e\n\u003ctd\u003e≤ Φ20 mm\u003c\/td\u003e\n\u003ctd\u003e≤ 1.6 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 54 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 36 mm from tubesheet face\u003c\/td\u003e\n\u003ctd\u003e3.0 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC25\u003c\/td\u003e\n\u003ctd\u003e≤ Φ25 mm\u003c\/td\u003e\n\u003ctd\u003e≤ 1.6 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 60 mm\u003c\/td\u003e\n\u003ctd\u003e≥ 36 mm from tubesheet face\u003c\/td\u003e\n\u003ctd\u003e3.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eU-bend insertion and fit-up requirements\u003c\/h3\u003e\n\u003cp\u003eThe U-bend tube is inserted into the straight tube to a depth of ≥8 mm (measured from the straight tube end face). Socket insertion gap is ≤10% of the thinner wall thickness — for most applications, zero gap is the target. Straight tube out-of-roundness must be ≤5% to maintain consistent arc length during rotation. Perpendicularity deviation of the tube axis relative to the welding head axis must be ≤5°. These tolerances are not conservative: arc length is fixed by head geometry, so tube roundness and perpendicularity directly determine arc stability throughout the 360° rotation. Prior to ordering, FYID-Feiyide recommends customers submit actual tubesheet drawings for welding accessibility confirmation, as tube pitch and straight tube extension height must be verified against the specific head model geometry.\u003c\/p\u003e\n\u003ch3\u003eWeld-before-expand process compatibility\u003c\/h3\u003e\n\u003cp\u003eThe FXT20 Pro-C series is designed for the weld-before-expand sequence required by ASME Section VIII, GB\/T 151, and other heat exchanger fabrication standards. The low heat input of pulse TIG at 5 A – 200 A range, combined with precise zone-by-zone current control, produces a weld with minimal heat-affected zone. The joint does not crack during subsequent tube expansion. If expansion is performed before welding — trapping air in the tube-tubesheet annular gap — thermal expansion of that trapped gas during welding produces porosity in the weld root. The FXT20 Pro-C's documentation output supports compliance with standards that mandate the weld-then-expand sequence.\u003c\/p\u003e\n\u003c!-- ── 3. INDUSTRY APPLICATIONS ───────────────────────────────\n     H2: industries + U-bend orbital welding\n     H3 per industry, ~280 words each\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eIndustry Applications for the FXT20 Pro-C U-Bend Orbital Welding System\u003c\/h2\u003e\n\u003ch3\u003eAI Data Center Direct Liquid Cooling — GPU Cluster Cold Plate Loop Manifolds\u003c\/h3\u003e\n\u003cp\u003eHigh-density AI GPU clusters — NVIDIA H100, H200, and successor architectures operating at 300 W to 700 W per chip in rack densities of 40 kW to 120 kW — cannot be adequately cooled by air. Direct liquid cooling (DLC) systems circulate deionized water or dielectric fluid through server-mounted cold plates and connect to facility cooling distribution units (CDUs) via stainless steel tube manifolds. The manifold assembly at the server rack or CDU level consists of U-bend tube connections between the supply and return headers — exactly the joint geometry the FXT20 Pro-C is designed to weld.\u003c\/p\u003e\n\u003cp\u003eThe specific technical requirement in AI data center liquid cooling is leak-zero performance: a single weld failure in a rack-level cooling manifold causes coolant contact with live GPU hardware, resulting in immediate rack shutdown and potential permanent hardware damage. Manual TIG on Φ12 mm – Φ16 mm 316L stainless tube at 0.8 mm – 1.0 mm wall thickness in a production environment produces insufficient repeatability for leak-zero standards. The FXT20 Pro-C's 5 A arc initiation and full closed-loop servo rotation deliver consistent heat input and arc length on every joint in a production batch, with per-weld parameter logging that supports quality inspection traceability for rack-level cooling system commissioning.\u003c\/p\u003e\n\u003cp\u003eThe dual-channel integrated argon protection — external weld pool and internal tube simultaneously — produces silver-white oxide-free weld interiors on 316L stainless steel, preventing iron oxide particulate from entering the cooling loop and reaching GPU cold plate micro-channels. Compatible tube: 316L stainless steel, Φ9 mm – Φ25 mm OD, wall 0.5 mm – 1.0 mm. Application: CDU manifold prefabrication, rack-level cooling loop assembly, DLC retrofit installations.\u003c\/p\u003e\n\u003ch3\u003eShell-and-Tube Heat Exchangers — U-Tube Bundle Fabrication for Industrial and HVAC Applications\u003c\/h3\u003e\n\u003cp\u003eShell-and-tube heat exchangers in HVAC, refrigeration, and industrial process service use U-tube bundle configurations where hairpin-bent tubes are inserted into a tubesheet and seal-welded at the tube end. In a standard U-tube bundle for a 500 kW to 2000 kW chiller or process cooler, the tubesheet may contain 200 to 800 tube penetrations. Each tube requires a circumferential fillet weld between the inserted U-bend and the straight tube stub — a repetitive, high-count welding operation where weld quality variance across hundreds of joints in a single bundle determines the assembly's leak test result.\u003c\/p\u003e\n\u003cp\u003eManual tube-to-tubesheet welding inside a dense bundle requires the welder to reach into the tube array with a TIG torch, maintaining consistent arc length and torch angle in positions constrained by adjacent tubes. In standard equilateral triangle pitch layouts at 38 mm – 54 mm center spacing, the manual welder's access deteriorates as tube count increases and the bundle interior becomes inaccessible without removing outer tubes. The FXT20 Pro-C's horseshoe-shaped welding head requires only 38 mm tube center spacing (C12\/C16 models) to access and weld each joint — matching the minimum pitch of most commercial heat exchanger tubesheet layouts. One operator manages head insertion, clamping (30 seconds per joint with the elastic collet mechanism), weld cycle execution, and head removal without assistance.\u003c\/p\u003e\n\u003cp\u003eCompatible standards: ASME Section VIII Div. 1, GB\/T 151, TEMA. Compatible tube: stainless steel (304, 316L), carbon steel, titanium alloy. Tube OD Φ9 mm – Φ25 mm, combined wall ≤1.6 mm.\u003c\/p\u003e\n\u003ch3\u003eCentral Air Conditioning — Evaporator and Condenser U-Tube Prefabrication\u003c\/h3\u003e\n\u003cp\u003eCentral air conditioning units — water-cooled chillers, cooling towers, and precision air conditioning units in commercial and industrial buildings — use evaporator and condenser heat exchangers where stainless steel or copper-alloy U-tubes connect to straight tube headers. In high-efficiency chiller designs using stainless steel for corrosion resistance and system longevity, the U-bend-to-straight-tube joint must withstand refrigerant pressures of 2 MPa – 6 MPa and thermal cycling across the full operating range without leak initiation at the weld.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 Pro-C replaces traditional silver brazing at these joints with orbital TIG welding, which produces a metallurgically bonded joint with significantly higher pressure capacity than a brazed joint (brazed joint strength depends on braze alloy and flux coverage uniformity; TIG weld strength equals base metal). For stainless steel tube in refrigerant service, the elimination of flux residue — a corrosion initiation site inside refrigerant circuits — is an additional quality argument for TIG over brazing. The 8-zone independent programming compensates for gravitational effects on the weld pool as the head rotates through the overhead position, producing uniform bead geometry at 6 o'clock (overhead) and 12 o'clock (flat) that brazing cannot match on small-diameter tube.\u003c\/p\u003e\n\u003cp\u003eFor precision air conditioning units serving semiconductor fabs or pharmaceutical cleanrooms — where coolant loop contamination from flux or braze particulate is a process risk — the FXT20 Pro-C's oxide-free weld interior is the technically correct specification. Compatible tube: 316L stainless steel, copper-nickel alloys. Tube OD Φ9 mm – Φ25 mm.\u003c\/p\u003e\n\u003ch3\u003ePharmaceutical Double-Tube Heat Exchangers — GMP Hygienic U-Bend Welding on 316L Stainless\u003c\/h3\u003e\n\u003cp\u003eDouble-tube heat exchangers in pharmaceutical manufacturing — used for product heating and cooling in API synthesis, fermentation, and WFI generation — consist of an inner product-contact tube and an outer utility-fluid tube, connected at the return end by a U-bend. The inner tube inner surface is a GMP product-contact surface subject to ASME BPE SF1 surface finish requirements (Ra ≤ 0.51 µm) and visual inspection for weld bead uniformity, oxidation, and crevice formation. The U-bend-to-inner-tube joint is the most difficult surface to inspect and the most likely location for bacterial harbourage if the weld is oxidized, pitted, or geometrically irregular.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 Pro-C's dual-channel argon protection — external weld pool and internal tube inner wall simultaneously — produces the silver-white, oxide-free weld interior required by ASME BPE on 316L stainless steel without pickling or passivation in the completed assembly. The 5 A minimum arc initiation current handles the thin combined wall thickness (≤1.6 mm) of pharmaceutical-grade heat exchanger tube without burn-through, which is a rejection criterion on GMP product-contact surfaces regardless of whether the perforation causes a process leak. The built-in weld parameter printer produces per-joint documentation supporting the weld map and IQ\/OQ\/PQ validation records required for pharmaceutical heat exchanger qualification. Compatible standards: ASME BPE, FDA 21 CFR Part 11, EHEDG. Compatible tube: 316L stainless steel, Φ9 mm – Φ16 mm OD.\u003c\/p\u003e\n\u003c!-- ── 4. FAQ ──────────────────────────────────────────────────\n     H2: U-Bend orbital welder common questions\n     ──────────────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eFXT20 Pro-C U-Bend Orbital Welder — Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between the FXT20 Pro-C U-bend welder and the standard FXT20 with C-Series heads?\u003c\/h3\u003e\n\u003cp\u003eThe standard \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt20-high-purity-closed-chamber-orbital-welding-system-c-series\"\u003eFXT20 with C5–C170 enclosed heads\u003c\/a\u003e performs circumferential girth welds on straight tube-to-tube butt joints. The tube joint is enclosed inside the welding head, and both tube ends must be accessible for head installation.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 Pro-C with C12–C25 U-bend heads performs circumferential fillet welds on the socket joint between an inserted U-bend tube and a straight tube — the specific \"tube-in-tube\" geometry of heat exchanger U-tube bundles and liquid cooling manifold return bends. The horseshoe-shaped head clamps over the straight tube from outside the tube bundle, requiring only 38 mm tube center spacing to access each joint. These are two different machines for two different joint geometries; they are not interchangeable.\u003c\/p\u003e\n\u003ch3\u003eWhy does the FXT20 Pro-C use full closed-loop servo drive rather than a stepper motor?\u003c\/h3\u003e\n\u003cp\u003eDuring 360° rotation of the welding head around a U-bend socket joint, two forces act against uniform rotation speed: gravity (the weld pool tends to sag in the overhead position) and cable drag (the 8-metre flexible cable creates variable torque resistance as it wraps during rotation). A stepper motor runs open-loop — it commands position but cannot detect or correct speed deviation caused by these forces. A stepper motor in this application will produce measurable travel speed variation between the 12 o'clock (flat) and 6 o'clock (overhead) positions, resulting in different heat input and bead geometry at each position.\u003c\/p\u003e\n\u003cp\u003eThe FXT20 Pro-C's full closed-loop servo drive with high-resolution encoder detects speed deviation in real time and corrects within \u0026lt;1 ms. The result is uniform travel speed — and therefore uniform heat input — throughout the full rotation, ensuring consistent weld bead width and penetration at every clock position on the joint.\u003c\/p\u003e\n\u003ch3\u003eHow does the dual-channel argon protection work, and why is it necessary for 316L stainless steel U-bend joints?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20 Pro-C welding torch integrates two independent argon channels: one for external weld pool shielding (standard for all TIG welding) and one that delivers argon inside the straight tube to protect the inner wall of the weld zone during the weld cycle. Pre-flow time, post-flow time, and flow rate for each channel are independently programmable.\u003c\/p\u003e\n\u003cp\u003eAustenitic stainless steel (304, 316L) oxidizes rapidly above approximately 400°C. At weld temperatures (1400°C+), any atmospheric oxygen contact with the inner wall surface produces iron oxide scale — visible as blue, brown, or black discolouration — that is mechanically weaker than the base metal, creates a surface roughness incompatible with ASME BPE SF1 requirements, and in liquid cooling applications, generates particulate that can block GPU cold plate micro-channels. The integrated inner argon channel displaces oxygen from the tube interior during the weld cycle without requiring a separate back-purge setup from the tube end.\u003c\/p\u003e\n\u003ch3\u003eWhat tube center spacing does the welding head require, and how do I know if my tubesheet layout is compatible?\u003c\/h3\u003e\n\u003cp\u003eThe minimum tube center spacing requirements are: C12 and C16 heads require ≥38 mm center-to-center; C20 heads require ≥54 mm; C25 heads require ≥60 mm. These dimensions are determined by the physical housing of the horseshoe-shaped welding head — if the tube pitch is tighter than the minimum, the head will contact adjacent tubes during the rotation weld cycle.\u003c\/p\u003e\n\u003cp\u003eStandard equilateral triangle pitch heat exchanger tubesheets at 1.25× to 1.5× tube OD pitch will typically be compatible with the C12 and C16 heads for Φ12 mm and Φ16 mm tube. Before ordering, FYID-Feiyide recommends supplying the actual tubesheet drawing (tube OD, pitch, arrangement pattern, and straight tube extension height from the tubesheet face) for a free accessibility confirmation. Tubesheet layouts that do not meet minimum spacing can be evaluated for custom head configurations on request.\u003c\/p\u003e\n\u003ch3\u003eCan the FXT20 Pro-C weld copper-alloy tube in addition to stainless steel?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20 Pro-C is optimized for austenitic stainless steel (304, 316L) and duplex stainless steel (2205). Titanium alloy tube is also compatible with parameter adjustment. Copper and copper-nickel alloys have significantly different thermal conductivity and melting behavior from stainless steel — copper's thermal conductivity is approximately 25× that of 316L — requiring different current, pulse parameters, and argon flow rates. While the hardware is not prevented from running copper programs, FYID-Feiyide does not supply pre-qualified Expert Parameter Library programs for copper alloys in the standard configuration. Contact the applications engineering team for copper-alloy project assessment.\u003c\/p\u003e\n\u003ch3\u003eWhat documentation does the FXT20 Pro-C produce for heat exchanger quality records and pressure vessel inspection?\u003c\/h3\u003e\n\u003cp\u003eThe FXT20 Pro-C logs current (peak and base), arc voltage, rotation speed, zone index, and timestamp for every weld cycle. The built-in printer generates a printed weld report per joint on demand. USB export enables unlimited data archiving. This output supports: ASME Section VIII Div. 1 weld procedure documentation, GB\/T 151 heat exchanger fabrication records, ASME BPE IQ\/OQ\/PQ weld parameter traceability for pharmaceutical heat exchangers, and per-joint records for pressure test correlation in high-pressure cooling system commissioning.\u003c\/p\u003e\n\u003c!-- ── 5. CTA (no heading) ─────────────────────────────────── --\u003e\n\u003cp\u003eFor tubesheet accessibility confirmation, tube OD and pitch verification, or project-specific U-bend joint assessment, contact FYID-Feiyide's applications engineering team with your tubesheet drawing. C12, C16, C20, and C25 welding heads are available individually for operations already running the FXT20 Pro power source. Custom head geometries for non-standard tube pitch are available on request with a 20–30 working day lead time.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"FYID-Feiyide","offers":[{"title":"FXT20 Pro + C12","offer_id":51647234244890,"sku":"FYID-FXT-FXT20 Pro-C12","price":16560.0,"currency_code":"USD","in_stock":true},{"title":"FXT20 Pro + C16","offer_id":51647793791258,"sku":"FYID-FXT-FXT20 Pro-C16","price":16560.0,"currency_code":"USD","in_stock":true},{"title":"FXT20 Pro + C20","offer_id":51647793824026,"sku":"FYID-FXT-FXT20 Pro-C20","price":16560.0,"currency_code":"USD","in_stock":true},{"title":"FXT20 Pro + C25","offer_id":51647793856794,"sku":"FYID-FXT-FXT20 Pro-C25","price":16560.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/7071\/6698\/files\/fyid-c16-u-bend-tube-orbital-welding-machine.jpg?v=1775981870"},{"product_id":"benchtop-micro-orbital-welding-system-semiconductor","title":"FYID Benchtop Micro Orbital TIG Welder for Semiconductor and Lab Tubing — Φ3 mm to Φ12 mm","description":"\u003c!-- ============================================================\n     FYID-Feiyide Product Page Description\n     Product: Benchtop Micro Orbital Welding System (M12 + FXT20)\n\n     IMPORTANT: ALSO CHANGE the Shopify product title to:\n         FYID Benchtop Micro Orbital TIG Welder for Semiconductor\n         and Lab Tubing — Ph3 mm to Ph12 mm Tube OD\n     The current title is keyword-stuffed and will be penalised\n     by Google. Change it in Products \u003e Edit \u003e Title field BEFORE\n     publishing this description.\n\n     Paste everything inside \u003carticle\u003e...\u003c\/article\u003e into Shopify\n     product description HTML editor.\n     The FAQPage JSON-LD goes into theme\/layout\/theme.liquid before\n     \u003c\/head\u003e, or via a Script Tag app scoped to this product URL.\n     ============================================================ --\u003e\n\n\u003carticle\u003e\n\n\u003c!-- 1. PRODUCT DEFINITION --\u003e\n\u003ch2\u003eBenchtop Micro Orbital TIG Welder for Semiconductor Gas Lines, Lab Instrumentation, and Biopharma Tubing — Φ3 mm to Φ12 mm, All-in-One Integrated Design\u003c\/h2\u003e\n\n\u003cp\u003eThe FYID-Feiyide M12 Benchtop Micro Orbital Welding System is a fully integrated automatic orbital GTAW (TIG) welding station for thin-wall stainless steel, titanium, and high-purity alloy tube in the Φ3 mm to Φ12 mm outer diameter range. The power source, control system, and 2.2 L water-cooling tank are integrated into a single unit measuring 500 × 380 × 300 mm — a footprint that fits on a standard lab bench, inside a cleanroom equipment bay, or at a gas cabinet fabrication bench without a dedicated equipment layout.\u003c\/p\u003e\n\n\u003cp\u003eThis system addresses the specific welding challenge of micro-bore tube joints where manual TIG is technically impractical: at Φ3 mm to Φ6 mm tube OD with wall thicknesses below 0.5 mm, the heat input window between insufficient penetration and burn-through is too narrow to control manually with consistency. The M12 orbital head's pulse TIG control — with independently adjustable peak current, base current, frequency, and duty cycle — keeps heat input within the required window on every joint, producing repeatable silver-white oxidation-free welds that manual TIG cannot match at this scale.\u003c\/p\u003e\n\n\u003cp\u003eFor larger-diameter semiconductor UHP and pharmaceutical tubing from Φ6.35 mm to Φ168 mm, the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt20-high-purity-closed-chamber-orbital-welding-system-c-series\" title=\"FXT20 Closed Orbital Welder C5-C170 Weld Heads\"\u003eFXT20 with C5–C170 enclosed heads\u003c\/a\u003e covers the full range on the same power source platform.\u003c\/p\u003e\n\n\n\u003c!-- 2. CORE SPECIFICATIONS --\u003e\n\u003ch2\u003eM12 Benchtop System Specifications — Integrated Power Source and Micro Orbital Welding Head\u003c\/h2\u003e\n\n\u003ch3\u003eIntegrated unit and welding head\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTube OD range\u003c\/td\u003e\n\u003ctd\u003eΦ3 mm – Φ12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWelding process\u003c\/td\u003e\n\u003ctd\u003eAutogenous orbital GTAW (TIG) — DC Pulse mode\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum average weld current\u003c\/td\u003e\n\u003ctd\u003e30 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003e220 V AC ±20%, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCooling system\u003c\/td\u003e\n\u003ctd\u003eIntegrated 2.2 L water-cooling tank (built-in, no external chiller required)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUnit footprint (L×W×H)\u003c\/td\u003e\n\u003ctd\u003e500 × 380 × 300 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHMI display\u003c\/td\u003e\n\u003ctd\u003e10-inch color touchscreen, Chinese\/English\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStored programs\u003c\/td\u003e\n\u003ctd\u003e200 groups (Expert Parameter Library)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eData output\u003c\/td\u003e\n\u003ctd\u003eBuilt-in maintenance-free thermal printer; USB export\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGrid tolerance\u003c\/td\u003e\n\u003ctd\u003e±20% input voltage fluctuation protection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSafety protections\u003c\/td\u003e\n\u003ctd\u003eOver-voltage, overload, tungsten short-circuit, defect detection, weld anomaly alarm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOptional integration\u003c\/td\u003e\n\u003ctd\u003eRobotic arm interface for automated production line\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, ISO 9001\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eM12 welding head — tube diameter to axial clearance reference\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eTube OD\u003c\/th\u003e\n\u003cth\u003eMin. axial net space required\u003c\/th\u003e\n\u003cth\u003eTypical application\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eΦ3 mm\u003c\/td\u003e\n\u003ctd\u003e12.2 mm\u003c\/td\u003e\n\u003ctd\u003eMicro UHP instrumentation lines, analytical instrument tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eΦ6.8 mm\u003c\/td\u003e\n\u003ctd\u003e12.2 mm\u003c\/td\u003e\n\u003ctd\u003eSemiconductor sub-fab gas distribution, lab gas manifolds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eΦ10 mm\u003c\/td\u003e\n\u003ctd\u003e26.4 mm\u003c\/td\u003e\n\u003ctd\u003eProcess gas instrument tubing, small-bore biopharma lines\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eΦ12 mm\u003c\/td\u003e\n\u003ctd\u003e26.4 mm\u003c\/td\u003e\n\u003ctd\u003eSemiconductor BCU lines, photovoltaic process gas, nuclear I\u0026amp;C tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePulse TIG parameter control for micro-bore tube\u003c\/h3\u003e\n\u003cp\u003eAt tube OD below Φ6 mm and wall thickness below 0.5 mm, DC pulse TIG is the only GTAW mode that provides sufficient heat input control to weld consistently without burn-through. The M12 system's pulse parameters — peak current, base current, pulse frequency (Hz), and pulse duty cycle (%) — are independently programmable per welding segment. The peak current melts the base metal; the base current allows partial solidification before the next peak, preventing heat accumulation. This on\/off thermal cycling makes autogenous welding on Φ3 mm tube at 0.2 mm wall thickness achievable without filler wire and without the burn-through that a continuous DC arc produces at the same average current.\u003c\/p\u003e\n\u003cp\u003eThe Expert Parameter Library stores pre-qualified pulse programs indexed by tube OD and wall thickness. For tube dimensions already in the library, the operator selects the program and begins welding — no manual pulse parameter calculation is required.\u003c\/p\u003e\n\n\n\u003c!-- 3. INDUSTRY APPLICATIONS --\u003e\n\u003ch2\u003eIndustry Applications for the M12 Benchtop Micro Orbital Welding System\u003c\/h2\u003e\n\n\u003ch3\u003eSemiconductor Fabrication — Sub-Fab Gas Distribution and Instrument Tubing\u003c\/h3\u003e\n\u003cp\u003eSemiconductor fab gas delivery infrastructure operates on two scales: the primary UHP distribution system from the gas farm to the process tool, which uses Φ6.35 mm to Φ38 mm tube covered by the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt20-high-purity-closed-chamber-orbital-welding-system-c-series\" title=\"FXT20 Closed Orbital Welder C5-C170 Weld Heads\"\u003eFXT20 C-Series enclosed heads\u003c\/a\u003e; and the instrument tubing and sub-fab sampling lines, which use Φ3 mm to Φ12 mm tube connecting pressure transducers, mass flow controllers (MFCs), and valve manifold blocks (VMBs) to the gas distribution network. This instrument tubing carries the same purity requirements as the main gas lines — SEMI F20 particle and contamination limits apply at every joint — but joint count per tool bay is higher and physical access is more constrained.\u003c\/p\u003e\n\u003cp\u003eManual TIG welding on Φ3 mm to Φ6 mm 316L EP-grade stainless steel instrument tube is not consistently achievable at the tolerances SEMI F20 requires: arc length variation at this scale produces joint-to-joint surface finish variation that no manual welder can control. The M12 system's fixed head geometry and pulse TIG control eliminate the arc length variable entirely, producing SEMI-compliant silver-white weld interiors on every joint in the batch. The 500 × 380 × 300 mm integrated footprint allows the unit to be positioned at the gas cabinet assembly bench without dedicated floor space. The 200-group parameter library stores qualified programs for every instrument tubing specification across a fab gas system, recallable in a single touchscreen step between jobs.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: EP-grade 316L stainless steel, Φ3 mm – Φ12 mm OD, wall 0.2 mm – 1.5 mm. Relevant standards: SEMI F20, SEMI F57, SEMI C10.\u003c\/p\u003e\n\n\u003ch3\u003eBiopharmaceutical and Laboratory — Small-Bore Process Tubing and Analytical Instrument Lines\u003c\/h3\u003e\n\u003cp\u003eBiopharmaceutical manufacturing and research facilities use small-bore stainless steel tubing in two contexts suited to the M12 system. First, analytical instrument sampling lines — connecting inline process analyzers (UV, Raman, pH, dissolved oxygen sensors) to process streams in bioreactors and chromatography systems — typically use Φ3 mm to Φ6 mm 316L tube with surface finish requirements matching the ASME BPE process-contact surface specification. These lines are welded in small quantities per project but require the same weld documentation as main process piping because they are product-contact surfaces under GMP.\u003c\/p\u003e\n\u003cp\u003eSecond, R\u0026amp;D laboratories building custom fluid handling systems for cell culture, fermentation, or API synthesis development require reliable autogenous welds on small-diameter stainless and titanium tube that lab technicians cannot produce manually. The M12 system's benchtop form factor, one-day operator training requirement, and pre-loaded parameter library make it deployable in an R\u0026amp;D environment without a dedicated welding technician or facility modification. The built-in thermal printer generates per-weld documentation satisfying FDA 21 CFR Part 11 requirements for laboratory instrument qualification. For larger-diameter process piping in the same facility — CIP\/SIP headers, WFI loops, product transfer lines — the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt20-high-purity-closed-chamber-orbital-welding-system-c-series\" title=\"FXT20 Closed Orbital Welder C5-C170 Weld Heads\"\u003eFXT20 with C40–C120 enclosed heads\u003c\/a\u003e handles Φ25 mm to Φ114 mm tube on the same power source architecture.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: 316L stainless steel, titanium Grade 2. Tube OD Φ3 mm – Φ12 mm. Relevant standards: ASME BPE, FDA 21 CFR Part 11, ISO 14644.\u003c\/p\u003e\n\n\u003ch3\u003ePhotovoltaic Manufacturing — High-Purity Process Gas and Chemical Delivery Lines\u003c\/h3\u003e\n\u003cp\u003ePhotovoltaic cell manufacturing uses CVD, PECVD, and diffusion furnace processes that require high-purity delivery of silane (SiH₄), ammonia (NH₃), phosphine (PH₃), and specialty dopant gases through stainless steel instrument tubing in the Φ3 mm to Φ12 mm range. Weld quality directly affects process gas purity: oxidized or porous weld interiors generate particle contamination and moisture outgassing that affect cell efficiency and process repeatability across a production run.\u003c\/p\u003e\n\u003cp\u003ePV manufacturing facilities are large-footprint, high-throughput environments where instrument tubing installation is performed by facility contractors rather than specialized semiconductor piping crews. The M12 system's one-day operator training requirement, integrated design requiring no external cooling unit, and ±20% grid voltage tolerance make it deployable by instrument technicians in the production facility without the infrastructure support that conventional split-type orbital systems require. The robotic arm integration option supports automated tubing sub-assembly production for high-volume PV module manufacturing lines where instrument tubing harness fabrication is a throughput bottleneck.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: 316L stainless steel, Φ3 mm – Φ12 mm OD. Application: CVD\/PECVD process gas instrument lines, chemical delivery tubing, diffusion furnace gas manifolds.\u003c\/p\u003e\n\n\u003ch3\u003eNuclear Power — Instrumentation and Control System Tubing in Safety-Related Service\u003c\/h3\u003e\n\u003cp\u003eNuclear power plant I\u0026amp;C systems use small-bore stainless steel tubing — typically Φ6 mm to Φ12 mm in 316L or 304L — for pressure, temperature, and flow measurement impulse lines connecting primary-system instruments to I\u0026amp;C panels. These joints are classified as safety-related components under 10 CFR 50 Appendix B and must be fabricated under a nuclear quality assurance program: WPS\/PQR qualification under ASME Section IX, per-weld parameter records, and material traceability from heat number to installed location.\u003c\/p\u003e\n\u003cp\u003eThe M12 system's FXT20 power source logs current, arc voltage, rotation speed, and timestamp for every weld cycle, with printed weld reports on demand and USB data export for archiving. This per-weld documentation chain satisfies 10 CFR 50 Appendix B and NQA-1 traceability requirements for safety-related small-bore tubing fabrication. The ±20% grid voltage tolerance addresses a specific operational requirement for nuclear plant environments where power quality at the instrument installation location may not meet the tighter tolerance of conventional orbital welding supplies. For nuclear auxiliary piping in larger diameters, the \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt40-pro-industrial-open-head-orbital-welding-system-k-series\" title=\"FXT40 Pro Open-Head Orbital Welder Industrial Tube TIG\"\u003eFXT40 Pro with K-series heads\u003c\/a\u003e covers Φ20 mm to Φ325 mm pipe in the same documentation framework.\u003c\/p\u003e\n\u003cp\u003eCompatible tube: 316L, 304L stainless steel. Tube OD Φ6 mm – Φ12 mm. Relevant standards: ASME Section IX, 10 CFR 50 Appendix B, NQA-1, RCC-M (French nuclear).\u003c\/p\u003e\n\n\n\u003c!-- 4. FAQ --\u003e\n\u003ch2\u003eM12 Benchtop Micro Orbital Welder — Frequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat tube diameter range does the M12 system cover, and how does it differ from the FXT20 C-Series?\u003c\/h3\u003e\n\u003cp\u003eThe M12 benchtop system covers tube outer diameters from Φ3 mm to Φ12 mm — the micro-bore instrument tubing range used in semiconductor sub-fab gas distribution, analytical instrument lines, laboratory fluid handling, and nuclear I\u0026amp;C impulse tubing. The integrated 500 × 380 × 300 mm unit with built-in 2.2 L water cooling is optimized for bench-mounted operation at maximum 30 A average weld current.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/fyid-feiyide.com\/products\/fxt20-high-purity-closed-chamber-orbital-welding-system-c-series\" title=\"FXT20 Closed Orbital Welder C5-C170 Weld Heads\"\u003eFXT20 with C5–C170 enclosed heads\u003c\/a\u003e covers Φ6.35 mm to Φ168 mm tube at up to 200 A output, using a separate power source and welding head for on-site cleanroom and field installation work. For tube OD above Φ12 mm in UHP, pharmaceutical, and food applications, the FXT20 C-Series is the correct system.\u003c\/p\u003e\n\n\u003ch3\u003eWhy is pulse TIG necessary for Φ3 mm to Φ6 mm micro-bore tube welding?\u003c\/h3\u003e\n\u003cp\u003eAt Φ3 mm to Φ6 mm OD with wall thickness below 0.5 mm, continuous DC TIG arc causes heat accumulation and burn-through before the weld reaches full circumference. Pulse TIG alternates between a high peak current (melting) and a low base current (partial solidification), controlling average heat input per unit weld length. The M12 system's pulse parameters — peak current, base current, frequency (Hz), and duty cycle (%) — are independently programmable per weld segment and stored in the 200-group Expert Parameter Library indexed by tube OD and wall thickness.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the M12 system require an external water chiller or cooling unit?\u003c\/h3\u003e\n\u003cp\u003eNo. The 2.2 L water-cooling tank is integrated inside the 500 × 380 × 300 mm enclosure. The M12 deploys with a single 220 V AC single-phase power connection and an argon supply — no external chiller, cooling tower, or separate water circulation unit is required. This is the primary practical difference from split-type micro orbital welding configurations, which require separate power source, head, and cooling units.\u003c\/p\u003e\n\n\u003ch3\u003eWhat weld documentation does the M12 produce for SEMI, GMP, and nuclear audits?\u003c\/h3\u003e\n\u003cp\u003eThe built-in maintenance-free thermal printer generates a weld report per joint on demand or automatically after each cycle, including: program number, tube OD, current profile (peak and base values per segment), pulse parameters, arc voltage, rotation speed, pre-flow and post-flow times, and timestamp. USB export enables unlimited archiving. This output satisfies: SEMI F20 weld traceability for semiconductor UHP instrument lines, ASME BPE and FDA 21 CFR Part 11 records for pharmaceutical analytical tubing, and 10 CFR 50 Appendix B \/ NQA-1 per-weld documentation for nuclear I\u0026amp;C safety-related tubing.\u003c\/p\u003e\n\n\u003ch3\u003eCan the M12 system be integrated into an automated production line?\u003c\/h3\u003e\n\u003cp\u003eYes. The M12 includes a robotic arm integration interface allowing the welding head to be mounted on a robotic arm for automated tube sub-assembly production. The robot positions tube joints sequentially and triggers the weld cycle; the FXT20 control system manages all parameters and documentation. This configuration is used in high-volume photovoltaic instrument tubing harness fabrication and semiconductor gas cabinet sub-assembly production where manual repositioning between joints is a throughput bottleneck. Contact FYID-Feiyide's applications engineering team for robotic arm integration specifications and communication protocol details.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the minimum axial clearance the M12 welding head requires to access a joint?\u003c\/h3\u003e\n\u003cp\u003eMinimum axial net space (clearance along the tube axis between the joint and the nearest adjacent component): 12.2 mm for tube OD up to Φ6.8 mm; 26.4 mm for tube OD from Φ10 mm to Φ12 mm. For instrument tubing in gas cabinets or VMB assemblies where axial clearance is constrained, provide the layout drawing to FYID-Feiyide's applications team for accessibility confirmation before ordering.\u003c\/p\u003e\n\n\n\u003c!-- 5. CTA (no heading) --\u003e\n\u003cp\u003eFor tube OD and wall thickness confirmation, Expert Parameter Library coverage verification, or robotic arm integration specifications, contact FYID-Feiyide's applications engineering team. The M12 welding head is available as part of the complete integrated benchtop system — it is not offered separately from the FXT20 integrated power source in this configuration.\u003c\/p\u003e\n\n\u003c\/article\u003e\n\n\n\u003c!-- ============================================================\n     FAQPage JSON-LD Schema\n     Add to theme\/layout\/theme.liquid before \u003c\/head\u003e,\n     or via a Script Tag app scoped to this product URL only.\n     ============================================================ --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What tube diameter range does the M12 benchtop micro orbital welder cover?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The M12 benchtop system covers tube outer diameters from 3 mm to 12 mm for semiconductor sub-fab gas distribution, analytical instrument lines, laboratory fluid handling, and nuclear instrumentation. The integrated 500 x 380 x 300 mm unit with built-in 2.2 L water cooling operates at maximum 30 A average weld current. For tube OD above 12 mm up to 168 mm, the FXT20 with C5-C170 enclosed heads is the correct system.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why is pulse TIG necessary for 3 mm to 6 mm micro-bore tube welding?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"At 3 mm to 6 mm OD with wall thickness below 0.5 mm, continuous DC TIG arc causes heat accumulation and burn-through before the weld reaches full circumference. Pulse TIG alternates between peak current (melting) and base current (partial solidification), controlling average heat input per unit weld length. The M12 system stores pre-qualified pulse programs in a 200-group Expert Parameter Library indexed by tube OD and wall thickness.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the M12 micro orbital welding system require an external water chiller?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. The 2.2 L water-cooling tank is integrated inside the 500 x 380 x 300 mm enclosure. The M12 deploys with only a 220V AC single-phase power connection and argon supply. No external chiller, cooling tower, or separate water circulation unit is required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What weld documentation does the M12 produce for SEMI, GMP, and nuclear audits?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The built-in thermal printer generates a weld report per joint including program number, tube OD, current profile per segment, pulse parameters, arc voltage, rotation speed, pre-flow and post-flow times, and timestamp. USB export supports unlimited archiving. Output satisfies SEMI F20 traceability, ASME BPE and FDA 21 CFR Part 11 pharmaceutical records, and 10 CFR 50 Appendix B and NQA-1 nuclear documentation requirements.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can the M12 benchtop orbital welder be integrated into an automated production line?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The M12 includes a robotic arm integration interface for automated tube sub-assembly production. The robot positions joints and triggers the weld cycle; the control system manages all parameters and documentation. Used in photovoltaic instrument tubing harness fabrication and semiconductor gas cabinet sub-assembly production.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the minimum axial clearance the M12 welding head requires?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Minimum axial net space: 12.2 mm for tube OD up to 6.8 mm; 26.4 mm for tube OD from 10 mm to 12 mm. For constrained installations in gas cabinets or VMB assemblies, provide the layout drawing to FYID-Feiyide's applications team for accessibility confirmation before ordering.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"FYID-Feiyide","offers":[{"title":"M12+FXT20","offer_id":52082618138906,"sku":"FYID-FXT-FXT20-M12","price":13553.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/7071\/6698\/files\/fyid-integrated-benchtop-micro-orbital-welderjpg.jpg?v=1776244148"},{"product_id":"fyid-g168-industrial-open-head-orbital-welding-system-500a-heavy-duty-tig-welder-for-φ219mm-to-unlimited-pipes-5-100mm-wall-thickness","title":"G168 Track-Type Intelligent Automatic Orbital Welding Machine — MIG\/MAG\/FCAW All-Position Pipe Welder ≥Φ219mm, 5–100mm Wall","description":"\u003c!-- ============================================================\n     FYID-Feiyide Product Page Description\n     Product: G168 Track-Type Intelligent Automatic Orbital Welding Machine\n     GEO-Optimized | H2 Structure | FAQ Included\n     ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ── 1. PRODUCT DEFINITION ─────────────────────────────────── --\u003e\n\u003ch2\u003eG168 Track-Type Intelligent Orbital Welding Machine — MIG\/MAG\/FCAW All-Position Automatic Pipe Welder for Pipe Diameter ≥ Φ219 mm, Wall Thickness 5 mm to 100 mm\u003c\/h2\u003e\n\u003cp\u003eThe FYID-Feiyide G168 is a track-mounted intelligent automatic orbital welding system designed for all-position girth welding on large-diameter industrial pipe with wall thicknesses from 5 mm to 100 mm. The system supports MIG, MAG, FCAW (Flux-Cored Arc Welding), GMAW, standard pulse, and double-pulse welding processes — making it one of the most process-versatile automatic pipe welding systems available for carbon steel, stainless steel, alloy steel, and low-temperature steel applications.\u003c\/p\u003e\n\u003cp\u003eUnlike clamp-type orbital welding heads that require a fixed mounting interface, the G168 travels along a customized spring-steel track that is installed directly onto the pipe. The track system accommodates pipe diameters from Φ219 mm upward with no upper diameter limit, covering large-bore transmission pipelines, offshore riser piping, structural pipe piles, and large-diameter pressure vessels that fall outside the range of conventional orbital welding clamps.\u003c\/p\u003e\n\u003cp\u003eThe G168 integrates dozens of patented technologies across automatic welding control, multi-axis electronic servo drive, intelligent zone-based parameter control, and electronic fault detection. The power control system is built around a Finland KEMPPI full-digital gas-shielded welding power source — a globally recognized industrial-grade platform specified for low-spatter, high-deposition, high duty cycle production welding. Wireless WiFi remote control via a 5-inch color touchscreen allows complete weld parameter adjustment from a safe distance during the weld cycle, without operator proximity to the arc.\u003c\/p\u003e\n\u003cp\u003eWelding efficiency with the G168 is 3 to 4 times higher than manual SMAW (Stick welding) on equivalent pipe joints, with consistent, repeatable weld properties across every joint in the production run — independent of operator skill variability or fatigue.\u003c\/p\u003e\n\u003c!-- ── 2. SYSTEM COMPOSITION ──────────────────────────────────── --\u003e\n\u003ch2\u003eG168 System Composition — Welding Head, Power Control System, and Remote Control Unit\u003c\/h2\u003e\n\u003cp\u003eThe G168 automatic orbital welding system consists of three integrated subsystems that operate together as a complete production welding platform:\u003c\/p\u003e\n\u003ch3\u003eG168 Welding Head — Track-Mounted All-Position Orbital Drive Unit\u003c\/h3\u003e\n\u003cp\u003eThe G168 welding head is the orbital drive and torch positioning unit that travels along the pipe-mounted track. It houses the constant-torque drive motor, stepper motor X\/Y oscillation axes, AVC (Arc Voltage Control) vertical motion system, integrated wire feeder, and the angle sensor that provides positional feedback for the 12-zone or 24-zone automatic parameter control system. The welding head mounts to the track via the quick-buckle interface and can be installed and removed in under 1 minute. Head dimensions are 231 × 306 × 230 mm (436 × 306 × 239 mm with wire feeder system); head weight is 11 kg.\u003c\/p\u003e\n\u003ch3\u003eKEMPPI Full-Digital Power Control System — MIG\/MAG\/Pulse\/Double-Pulse\u003c\/h3\u003e\n\u003cp\u003eThe G168 power control system is built around a Finland KEMPPI full-digital gas-shielded welding power source. KEMPPI power sources are specified for industrial production welding applications requiring low spatter, fast welding speed, high duty cycle, and arc waveform stability across the full current and voltage range. The integrated structure houses all components — power source, wire drive, cooling system, and control electronics — in a single mobile unit on universal wheels, suitable for on-site movement in harsh field welding environments.\u003c\/p\u003e\n\u003ch3\u003e5-Inch Wireless WiFi Remote Control Unit — Hand-Held Touchscreen Interface\u003c\/h3\u003e\n\u003cp\u003eThe G168 remote control unit is a hand-held 5-inch high-definition color touchscreen that communicates with the welding head and power source via wireless WiFi. The remote allows the operator to adjust all weld parameters in real time during the weld cycle — welding bead selection, welding speed, wire feeding speed, oscillation action, vertical (AVC) motion, and arc length correction — without approaching the arc. Manual and automatic operating modes can be switched directly from the touchscreen. The remote fits in one hand and is ergonomically designed for field use in all weather conditions.\u003c\/p\u003e\n\u003c!-- ── 3. CORE PATENTED TECHNOLOGIES ─────────────────────────── --\u003e\n\u003ch2\u003eCore Patented Technologies in the G168 Track-Type Orbital Welding System\u003c\/h2\u003e\n\u003ch3\u003eConstant-Torque Drive Motor — Precise All-Position Travel Speed\u003c\/h3\u003e\n\u003cp\u003eThe G168 welding head is driven by a constant-torque motor that maintains precise rotational positioning and constant travel speed from flat (0°) through vertical (90°) to overhead (180°) and back through the full 360° circumference. In track-type orbital welding on large-diameter pipe, the drive motor must overcome varying gravitational load as the head traverses overhead and vertical positions on a large-radius track. The constant-torque design compensates for this load variation, maintaining the programmed travel speed without deviation at any position — ensuring consistent heat input per unit length and uniform bead geometry throughout the full joint.\u003c\/p\u003e\n\u003ch3\u003eLightweight Head with Ultra-Narrow Body — Confined-Space Access and Reduced Operator Fatigue\u003c\/h3\u003e\n\u003cp\u003eThe G168 welding head is designed with a lightweight body (11 kg) and ultra-narrow profile (306 mm width). The compact geometry allows the head to be installed and operated in confined pipeline trenches, offshore platform pipe decks, ship compartments, and industrial plant piping corridors where large welding head assemblies cannot fit. The lightweight body significantly reduces operator fatigue during installation, repositioning, and removal across high–joint-count production runs — particularly on cross-country pipeline projects where the system may be repositioned dozens of times per day.\u003c\/p\u003e\n\u003ch3\u003eFully Enclosed Bottom Structure — Debris Exclusion (Exclusive Patent)\u003c\/h3\u003e\n\u003cp\u003eThe G168 welding head incorporates a fully enclosed bottom structure, an exclusive FYID-Feiyide patent. The enclosed base prevents iron filings, weld spatter, grinding debris, and pipe scale from entering the mechanical drive components of the welding head during fabrication. In field pipeline welding environments — where grinding of weld caps, removal of tack welds, and thermal cutting operations occur in close proximity to the welding equipment — debris ingress is a primary cause of premature drive mechanism wear and electronic control failures. The enclosed bottom structure significantly extends service life and reduces unplanned maintenance compared to open-base track welding head designs.\u003c\/p\u003e\n\u003ch3\u003eHigh Dynamic Performance and Output Torque — Weld Quality Stability on Large-Radius Tracks\u003c\/h3\u003e\n\u003cp\u003eThe G168 drive system is engineered for high dynamic performance and high output torque throughout the rotational cycle. On large-diameter pipe (Φ500 mm, Φ1000 mm, and above), the track radius is large and the gravitational load vector acting on the drive motor changes significantly between flat, vertical, and overhead positions. High dynamic torque output ensures that travel speed deviations caused by these gravitational load changes are corrected within milliseconds, maintaining the programmed travel speed specified in each zone of the weld program. This mechanical stability is the primary factor ensuring consistent bead width, penetration, and fusion characteristics from root pass to cap pass on large-bore heavy-wall pipe.\u003c\/p\u003e\n\u003ch3\u003eStepper Motor X\/Y Axis Control — Precision Oscillation Positioning\u003c\/h3\u003e\n\u003cp\u003eTransverse oscillation (weaving) of the welding torch is controlled by stepper motors on the X and Y axes. Stepper motor control provides closed-loop positioning accuracy in fractions of a millimeter, ensuring that oscillation width (2 mm – 30 mm, continuously adjustable), left dwell time (0 – 2 s), right dwell time (0 – 2 s), and oscillation speed (0 – 50, continuously adjustable) are executed to the programmed values at every position in the rotation cycle. In all-position welding on heavy-wall pipe, precise oscillation control is critical for consistent edge tie-in and inter-pass bead placement across 5 mm to 100 mm wall thicknesses. The stepper motor architecture eliminates the positioning drift that characterizes DC motor oscillation systems.\u003c\/p\u003e\n\u003ch3\u003eIntelligent Pendulum Oscillation — Up to 100 mm Wall Thickness Capability\u003c\/h3\u003e\n\u003cp\u003eThe G168's intelligent pendulum oscillation (OSC) function dynamically adjusts oscillation parameters — width, frequency, and dwell — based on the programmed weld zone and layer, enabling consistent multi-pass fill welding in deep V-groove and U-groove joints on pipe walls up to 100 mm thick. This 100 mm wall capability is a globally significant breakthrough in all-position automatic orbital welding, extending machine welding into the territory of the heaviest pipeline, offshore riser, and structural pile specifications previously accessible only to semi-automatic or manual GMAW. Layer thickness per pass is recommended at ≤ 5 mm; for a 10 mm wall pipe, a 2-layer sequence is the standard setup.\u003c\/p\u003e\n\u003ch3\u003e12-Zone and 24-Zone Intelligent Partition Control — Automatic Parameter Adjustment by Position\u003c\/h3\u003e\n\u003cp\u003eThe G168's automatic welding control system divides the 360° pipe circumference into either 12 zones (30° each) or 24 zones (15° each), with each zone carrying independent welding parameters. An internal angle sensor provides real-time positional feedback to the control system, triggering automatic parameter transitions as the welding head crosses zone boundaries. This zone-based architecture replicates the positional parameter adjustments that a certified manual welder makes instinctively — increasing current and reducing travel speed at overhead, adjusting oscillation dwell for horizontal — but executing these adjustments consistently, zone-by-zone, weld-by-weld, without operator intervention or fatigue effects. The 24-zone configuration provides finer positional control for critical applications where parameter transitions must be closely managed.\u003c\/p\u003e\n\u003ch3\u003eKEMPPI Intelligent Fusion Expert Program — Arc Waveform Control and Short-Circuit Stabilization\u003c\/h3\u003e\n\u003cp\u003eThe KEMPPI power source integrated into the G168 includes an intelligent fusion expert program that adds controlled short-circuit characteristics to both standard GMAW and pulsed GMAW modes. The computer-controlled arc waveform tracking system monitors and adjusts the arc waveform in real time to keep the molten pool in the optimum position throughout each zone — enabling flat-characteristic GMAW and pulsed GMAW with reliable arc stability and minimal spatter. This arc waveform management is particularly important in all-position welding where the weld pool behavior changes significantly between flat, vertical, and overhead positions due to gravitational effects on the liquid metal.\u003c\/p\u003e\n\u003ch3\u003eExclusive Quick-Buckle Track System — 1-Minute Installation\u003c\/h3\u003e\n\u003cp\u003eThe G168 operates on a customized track equipped with an exclusive FYID-Feiyide patented quick-buckle system. The track can be fully assembled and disassembled on the pipe in 1 minute, enabling rapid repositioning between joints on a production run — a critical efficiency factor on cross-country pipeline projects where hundreds of joints must be welded in sequence. The track features a retractable support block design for self-adaptive stability on varying pipe surface conditions, and a gear-type occlusal engagement system that provides high-precision head travel with zero backlash — directly contributing to bead geometry accuracy and weld quality. The track material is high-quality spring steel with outstanding wear resistance, low-temperature resistance (to −40°C), oxidation resistance, and corrosion resistance, with high yield strength, high fatigue strength, and sufficient toughness for repeated field use.\u003c\/p\u003e\n\u003cp\u003eTrack width is only 110 mm. For thermal insulated pipe, the track can be installed and operated without cutting the insulation layer — a significant practical advantage for in-service piping rehabilitation and hot-tap welding applications that eliminates insulation removal and replacement costs.\u003c\/p\u003e\n\u003c!-- ── 4. FULL SPECIFICATIONS ──────────────────────────────────── --\u003e\n\u003ch2\u003eG168 System Technical Specifications — Welding Head and Power Control System\u003c\/h2\u003e\n\u003ch3\u003eG168 Welding Head — Full Technical Parameters\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eG168\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\n\u003ctd\u003eDC 12 V – 35 V; typical DC 24 V; rated power \u0026lt; 100 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding current range\u003c\/td\u003e\n\u003ctd\u003e80 A – 500 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding voltage range\u003c\/td\u003e\n\u003ctd\u003e16 V – 35 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding speed\u003c\/td\u003e\n\u003ctd\u003e50 – 900 mm\/min, continuously adjustable (unlimited)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire feeding speed\u003c\/td\u003e\n\u003ctd\u003e0 – 2500 mm\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOscillation speed\u003c\/td\u003e\n\u003ctd\u003e0 – 50 (continuously adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOscillation width\u003c\/td\u003e\n\u003ctd\u003e2 mm – 30 mm, continuously adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDwell time (left\/right, independent)\u003c\/td\u003e\n\u003ctd\u003e0 – 2 s, continuously adjustable per side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead angle adjustment\u003c\/td\u003e\n\u003ctd\u003e± 15°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable pipe diameter\u003c\/td\u003e\n\u003ctd\u003e≥ Φ219 mm (no upper limit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable wall thickness\u003c\/td\u003e\n\u003ctd\u003e5 mm – 100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding wire diameter\u003c\/td\u003e\n\u003ctd\u003eΦ1.0 mm – Φ1.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding zone control\u003c\/td\u003e\n\u003ctd\u003e12-zone or 24-zone automatic partition control (internal angle sensor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive motor\u003c\/td\u003e\n\u003ctd\u003eConstant-torque motor (all-position travel speed stability)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOscillation axis control\u003c\/td\u003e\n\u003ctd\u003eStepper motor, X\/Y dual-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrack installation time\u003c\/td\u003e\n\u003ctd\u003e≤ 1 minute (exclusive quick-buckle patent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrack width\u003c\/td\u003e\n\u003ctd\u003e110 mm (fits over thermal insulation without cutting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrack material\u003c\/td\u003e\n\u003ctd\u003eHigh-quality spring steel (wear, low-temp, oxidation, and corrosion resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote control\u003c\/td\u003e\n\u003ctd\u003eWireless WiFi; 5-inch HD color touchscreen; single-hand operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e−20°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temperature\u003c\/td\u003e\n\u003ctd\u003e−20°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient temperature range (site)\u003c\/td\u003e\n\u003ctd\u003e−40°C to +75°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient humidity\u003c\/td\u003e\n\u003ctd\u003e20% – 90% (no condensation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (welding head)\u003c\/td\u003e\n\u003ctd\u003e231 × 306 × 230 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with wire feeder)\u003c\/td\u003e\n\u003ctd\u003e436 × 306 × 239 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (welding head)\u003c\/td\u003e\n\u003ctd\u003e11 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePower Control System (KEMPPI Full-Digital) — Full Technical Parameters\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding processes\u003c\/td\u003e\n\u003ctd\u003eMIG, MAG, FCAW, GMAW, Pulse GMAW, Double-Pulse GMAW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower voltage input\u003c\/td\u003e\n\u003ctd\u003e3-phase, 50\/60 Hz, 400 V (−15% \/ +20%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated power at 60% ED\u003c\/td\u003e\n\u003ctd\u003e22.1 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated power at 100% ED\u003c\/td\u003e\n\u003ctd\u003e16.0 KVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current at 60% ED\u003c\/td\u003e\n\u003ctd\u003e500 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current at 100% ED\u003c\/td\u003e\n\u003ctd\u003e390 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding current range (MIG)\u003c\/td\u003e\n\u003ctd\u003e10 A – 500 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding voltage range (MIG)\u003c\/td\u003e\n\u003ctd\u003e10 V – 50 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load voltage (MIG\/MAG\/Pulse)\u003c\/td\u003e\n\u003ctd\u003e80 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load power\u003c\/td\u003e\n\u003ctd\u003e100 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower factor (at max current)\u003c\/td\u003e\n\u003ctd\u003e0.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency (at max current)\u003c\/td\u003e\n\u003ctd\u003e88%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse (delayed)\u003c\/td\u003e\n\u003ctd\u003e35 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin. short-circuit capacity (Ssc)\u003c\/td\u003e\n\u003ctd\u003e5.5 MVA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMC level\u003c\/td\u003e\n\u003ctd\u003eClass A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection grade\u003c\/td\u003e\n\u003ctd\u003eIP23S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary device supply\u003c\/td\u003e\n\u003ctd\u003e50 V DC \/ 100 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling device supply\u003c\/td\u003e\n\u003ctd\u003e24 V DC \/ 50 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temperature range\u003c\/td\u003e\n\u003ctd\u003e−40°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e690 × 320 × 830 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMobility\u003c\/td\u003e\n\u003ctd\u003eUniversal wheels on base; integrated structure; field-portable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWelding Process Parameters — Consumables and Shielding Gas\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eShielding gas options\u003c\/td\u003e\n\u003ctd\u003eCO₂ (100%) or mixed gas (80% Ar + 20% CO₂)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding wire type\u003c\/td\u003e\n\u003ctd\u003eSolid wire or flux-cored wire (FCAW)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding wire diameter\u003c\/td\u003e\n\u003ctd\u003eΦ1.0 mm – Φ1.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended layer thickness per pass\u003c\/td\u003e\n\u003ctd\u003e≤ 5 mm per layer (e.g., 2 layers for 10 mm wall; up to ~20 layers for 100 mm wall)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible materials\u003c\/td\u003e\n\u003ctd\u003eCarbon steel, stainless steel, alloy steel, low-temperature steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eG168 vs. Manual SMAW — Efficiency Comparison\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCriterion\u003c\/th\u003e\n\u003cth\u003eG168 Automatic Orbital MIG\/MAG\u003c\/th\u003e\n\u003cth\u003eManual SMAW (Stick Welding)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding speed\u003c\/td\u003e\n\u003ctd\u003e50 – 900 mm\/min (programmable)\u003c\/td\u003e\n\u003ctd\u003eTypically 80 – 200 mm\/min (welder dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeposition rate\u003c\/td\u003e\n\u003ctd\u003eHigh (GMAW continuous wire; up to 500 A)\u003c\/td\u003e\n\u003ctd\u003eLow (electrode changes; 60–80% arc-on time typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative efficiency\u003c\/td\u003e\n\u003ctd\u003e3–4× higher than manual SMAW\u003c\/td\u003e\n\u003ctd\u003eBaseline reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeld consistency\u003c\/td\u003e\n\u003ctd\u003eProgram-controlled; operator-independent\u003c\/td\u003e\n\u003ctd\u003eWelder skill and fatigue dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpatter level\u003c\/td\u003e\n\u003ctd\u003eLow (KEMPPI arc waveform control)\u003c\/td\u003e\n\u003ctd\u003eHigher (process dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll-position capability\u003c\/td\u003e\n\u003ctd\u003eYes — 12\/24-zone automatic parameter control\u003c\/td\u003e\n\u003ctd\u003eYes — certified welder required per position\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumentation\u003c\/td\u003e\n\u003ctd\u003eDigital parameter storage and recall; WiFi remote logging\u003c\/td\u003e\n\u003ctd\u003eManual WPS compliance only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- ── 5. INDUSTRY APPLICATIONS ───────────────────────────────── --\u003e\n\u003ch2\u003eIndustry Applications for the G168 Track-Type Intelligent Orbital Welding System\u003c\/h2\u003e\n\u003ch3\u003eCross-Country Gas, Oil, and Water Transmission Pipeline Construction\u003c\/h3\u003e\n\u003cp\u003eCross-country pipeline construction represents the highest-volume application for track-type orbital welding systems. Pipelines for natural gas, crude oil, refined products, and water transmission are typically constructed in API 5L grades (Grade B through X80) with pipe diameters from Φ219 mm to Φ1422 mm and wall thicknesses from 6 mm to 25 mm or more. Each joint must meet API 1104 or equivalent standard, with 100% radiographic or AUT inspection on high-consequence segments.\u003c\/p\u003e\n\u003cp\u003eThe G168's quick-buckle track system (1-minute installation) enables rapid head repositioning along the right-of-way as construction advances — a critical production factor when a pipeline spread must complete 40 to 80 joints per day. The 12-zone automatic parameter control ensures consistent all-position weld quality on each joint without requiring a certified welder to monitor every pass. Efficiency 3–4× higher than manual SMAW directly translates to reduced project schedule and labor cost per kilometer of installed pipe.\u003c\/p\u003e\n\u003ch3\u003eOffshore Platform Piping, Flowlines, and Risers\u003c\/h3\u003e\n\u003cp\u003eOffshore platform structural piping, topside process piping, flowlines, and riser systems present the most demanding combination of requirements for automatic orbital welding: all-position welding in all attitudes (5G fixed-position), high-wind and high-humidity environments, saltwater corrosion exposure, and structural certification requirements from classification societies (DNV GL, Bureau Veritas, Lloyd's Register, ABS). The G168's IP23S-rated power control system and −40°C to +75°C site operating temperature range meet offshore environmental requirements. The 24-zone parameter control provides the fine positional resolution required for riser and flowline joints where specification-compliant weld profiles must be achieved at every position.\u003c\/p\u003e\n\u003ch3\u003eSteam Piping and District Heating Networks\u003c\/h3\u003e\n\u003cp\u003eSteam piping for power plants, industrial facilities, and district heating networks involves large-diameter heavy-wall carbon steel pipe welded to ASME B31.1 or EN 13480 standards, with alloy steel grades (P11, P22, P91) on high-temperature and high-pressure systems. The G168's 110 mm narrow track design is particularly advantageous for pre-insulated district heating pipe: the track installs over the existing insulation without cutting, enabling girth weld completion without insulation removal and replacement — reducing both project cost and thermal performance disruption on in-service network extensions.\u003c\/p\u003e\n\u003ch3\u003eChemical Process Piping and Petrochemical Plants\u003c\/h3\u003e\n\u003cp\u003eChemical process piping systems involve multi-material specifications — carbon steel, stainless steel, alloy steel, and low-temperature steel — often in close-coupled manifold configurations within plant structures. The G168 supports all four material groups with appropriate shielding gas selection (CO₂ for carbon steel; Ar\/CO₂ mix for stainless and alloy steel). The 24-zone automatic parameter control accommodates the position-specific welding challenges of piping joints within plant pipe racks, where structural steel obstructs manual welder access but the track-mounted G168 head can traverse the full circumference without obstruction.\u003c\/p\u003e\n\u003ch3\u003eLarge-Diameter Pressure Vessels, Tanks, and Pipe Piles\u003c\/h3\u003e\n\u003cp\u003eHorizontal and vertical seam welding on large-diameter pressure vessels, storage tanks, and structural pipe piles (Φ219 mm and above, including pile diameters exceeding Φ1000 mm) is a direct application for the G168's unlimited upper pipe diameter capability. The track-based system accommodates any pipe or vessel OD by adjusting track segment count, making it the only type of orbital welding system that scales to vessel and pile diameters beyond the range of all clamp-type heads. For tubular structure pile welding in marine and civil construction, the G168's outdoor operation capability (−40°C to +75°C ambient) and IP23S protection enable continuous production in exposed construction site conditions.\u003c\/p\u003e\n\u003ch3\u003eBuried Pipeline Rehabilitation and In-Trench Welding\u003c\/h3\u003e\n\u003cp\u003eBuried pipeline rehabilitation — hot-tap fitting installation, sleeve welding, and joint repair on in-service pipes — requires welding in confined trench conditions in all positions. The G168's 11 kg lightweight head and ultra-narrow 110 mm track profile enable installation and operation in trench widths that cannot accommodate manual welding equipment with equivalent output. For insulated buried pipelines, the narrow track eliminates the requirement to excavate and remove insulation over the joint area before welding — a significant cost and schedule benefit on rehabilitation projects.\u003c\/p\u003e\n\u003c!-- ── 6. FEATURES AND BENEFITS SUMMARY ───────────────────────── --\u003e\n\u003ch2\u003eG168 Key Features and Production Benefits Summary\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eProduction Benefit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eKEMPPI full-digital MIG\/MAG\/Pulse\/Double-Pulse power source\u003c\/td\u003e\n\u003ctd\u003eLow spatter, fast welding, ultra-high duty cycle, arc stability in all positions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12-zone \/ 24-zone intelligent partition control (angle sensor)\u003c\/td\u003e\n\u003ctd\u003eAutomatic parameter adjustment by position — consistent all-position weld quality without operator intervention\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExclusive quick-buckle spring-steel track (1-minute installation)\u003c\/td\u003e\n\u003ctd\u003eRapid repositioning between joints; high joint-count production efficiency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e110 mm narrow track — installs over pipe insulation\u003c\/td\u003e\n\u003ctd\u003eNo insulation removal required on thermal or buried pipe — reduced project cost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless WiFi 5-inch touchscreen remote control\u003c\/td\u003e\n\u003ctd\u003eReal-time parameter adjustment from safe distance; one-hand operation; no arc proximity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStepper motor X\/Y oscillation (2–30 mm width, 0–2 s dwell)\u003c\/td\u003e\n\u003ctd\u003eWide groove capability — suitable for narrow gap, wide gap, thin and thick pipe; precise edge tie-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntelligent pendulum oscillation — up to 100 mm wall\u003c\/td\u003e\n\u003ctd\u003eMachine welding on the heaviest wall specifications — replaces manual SMAW\/FCAW on thick-wall joints\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLightweight head 11 kg, ultra-narrow body\u003c\/td\u003e\n\u003ctd\u003eConfined-space access; reduced operator fatigue; rapid installation on high–joint-count projects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFully enclosed bottom structure (exclusive patent)\u003c\/td\u003e\n\u003ctd\u003eDebris exclusion — extended service life; reduced maintenance in field environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital parameter storage, recall, and self-diagnosis\u003c\/td\u003e\n\u003ctd\u003eWPS-compliant program recall; eliminates operator-to-operator quality variability; supports audit documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency 3–4× higher than manual SMAW\u003c\/td\u003e\n\u003ctd\u003eShorter project schedule; lower labor cost per joint; higher daily joint count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e−40°C to +75°C site operating range; indoor and outdoor\u003c\/td\u003e\n\u003ctd\u003eUnrestricted field deployment — Arctic pipelines, offshore platforms, desert petrochemical plants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- ── 7. FAQ ──────────────────────────────────────────────────── --\u003e\n\u003ch2\u003eG168 Orbital Welding Machine — Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the minimum pipe diameter the G168 can weld, and is there a maximum?\u003c\/h3\u003e\n\u003cp\u003eThe G168 is rated for pipe outer diameters of Φ219 mm and above. There is no specified upper diameter limit — the track system is assembled from segments that can be configured for any pipe OD, including large-diameter transmission pipelines (Φ610 mm, Φ914 mm, Φ1067 mm, Φ1422 mm) and very large pressure vessels or pipe piles. This unlimited upper diameter capability is a fundamental advantage of track-type orbital systems over clamp-type heads, which are constrained by their fixed mechanical geometry. For pipe diameters below Φ219 mm, FYID-Feiyide offers alternative orbital welding systems (FXT40 Pro K-Series for open-head TIG down to Φ20 mm; FXT20 C-Series for enclosed-head TIG on thin-wall tube).\u003c\/p\u003e\n\u003ch3\u003eWhat welding processes does the G168 support, and which is recommended for carbon steel pipeline welding?\u003c\/h3\u003e\n\u003cp\u003eThe G168 supports MIG, MAG, FCAW (Flux-Cored Arc Welding), GMAW, standard pulse GMAW, and double-pulse GMAW — all driven by the KEMPPI full-digital power source. For carbon steel transmission pipeline welding (API 5L Grade B through X70), MAG with CO₂ or Ar\/CO₂ mixed shielding gas (80% Ar + 20% CO₂) is the standard process. Ar\/CO₂ mixed gas is generally preferred for its lower spatter level and better arc stability compared to 100% CO₂, particularly in pulse and double-pulse modes where arc waveform control is critical. FCAW (flux-cored wire) is recommended for high-deposition fill passes on heavy-wall pipe where increased deposition rate is a priority over minimal spatter.\u003c\/p\u003e\n\u003ch3\u003eHow does the 12-zone vs. 24-zone partition control system work, and when should 24 zones be used?\u003c\/h3\u003e\n\u003cp\u003eThe G168 divides the 360° pipe circumference into either 12 zones (30° each) or 24 zones (15° each). An internal angle sensor provides real-time positional feedback, and the control system automatically applies the programmed parameters for each zone as the welding head crosses zone boundaries. In 12-zone mode, parameter transitions occur every 30° — adequate for most standard pipeline and process pipe applications. In 24-zone mode, transitions occur every 15°, providing finer positional control. 24-zone mode is recommended for: heavy-wall pipe (above 25 mm) where transitional parameter management between flat and overhead is critical; high-specification applications requiring tight control of bead geometry at overhead; and offshore or nuclear-adjacent applications where the welding procedure specification defines closely spaced positional parameter zones.\u003c\/p\u003e\n\u003ch3\u003eHow long does it take to install the G168 track on a pipe joint, and what tools are required?\u003c\/h3\u003e\n\u003cp\u003eThe G168 track system is designed for installation in under 1 minute using the exclusive patented quick-buckle mechanism. No special tools are required — the track segments snap and lock onto the pipe using the quick-buckle interface, and the retractable support blocks self-adapt to the pipe surface for stable contact. The gear-type occlusal track engagement with the welding head drive gear is established when the head is mounted onto the installed track. Total setup time from arriving at the joint to arc start — including track installation, head mounting, program recall, and pre-weld inspection — is typically 5 to 10 minutes on a previously qualified joint size. This rapid setup is a primary efficiency driver on high–joint-count pipeline construction projects.\u003c\/p\u003e\n\u003ch3\u003eCan the G168 weld stainless steel and low-temperature steel in addition to carbon steel?\u003c\/h3\u003e\n\u003cp\u003eYes. The G168 is compatible with carbon steel, stainless steel, alloy steel, and low-temperature steel. For stainless steel, Ar\/CO₂ mixed gas (80% Ar + 20% CO₂) or pure argon (depending on the specification) is used as shielding gas. For low-temperature steel grades (e.g., API 5L PSL2 at −40°C service, ASTM A333 grades for cryogenic applications), the KEMPPI power source's low-spatter arc waveform control and pulse capability enable weld heat input management to meet the impact toughness requirements of low-temperature service specifications. For alloy steel grades (Cr-Mo steels P11, P22), appropriate filler wire selection and preheat\/interpass temperature control are required as specified in the applicable WPS.\u003c\/p\u003e\n\u003ch3\u003eWhat documentation and parameter traceability does the G168 provide for quality and inspection records?\u003c\/h3\u003e\n\u003cp\u003eThe G168's 5-inch touchscreen remote control provides digital setting, modification, storage, and recall of all process parameters — enabling pre-weld qualification testing to establish the welding procedure, and then exact recall of those parameters for every production weld. Stored programs ensure that every weld in a production run is executed to the same parameter set as the qualified procedure, eliminating operator-to-operator variability. The self-diagnosis function logs system status and fault events. For projects requiring WPS\/PQR documentation under ASME Section IX, API 1104, or classification society approval, the G168's program storage provides the parameter traceability basis for the weld record. Wireless WiFi communication logs real-time parameter data during welding for post-weld record correlation.\u003c\/p\u003e\n\u003ch3\u003eWhat is the G168's ambient operating temperature range, and is it suitable for Arctic or desert pipeline projects?\u003c\/h3\u003e\n\u003cp\u003eThe G168 welding head operates from −20°C to +60°C; the site ambient temperature range is −40°C to +75°C. The track material (high-quality spring steel) maintains its mechanical properties — yield strength, fatigue strength, and toughness — throughout the full ambient range, including Arctic field conditions. The power control system stores and operates from −40°C to +60°C. This temperature range covers the full spectrum of international pipeline construction environments: Arctic permafrost pipelines, Northern European and Canadian winter construction, Middle Eastern desert petrochemical plants, and Southeast Asian tropical offshore platforms. For Arctic deployments, the Ar\/CO₂ shielding gas mixture and enclosed bottom structure provide additional protection against the effects of extreme cold on arc stability and equipment longevity.\u003c\/p\u003e\n\u003ch3\u003eHow does the G168 compare to semi-automatic FCAW (flux-cored arc welding) for pipeline construction?\u003c\/h3\u003e\n\u003cp\u003eSemi-automatic FCAW — where a welder manually guides the torch around the joint — is the dominant competing process for large-diameter heavy-wall pipeline welding. The G168 delivers three key advantages over semi-automatic FCAW: (1) Consistency — the 12\/24-zone automatic parameter control eliminates positional parameter variation caused by individual welder skill and fatigue, producing consistent bead geometry and mechanical properties from the first joint to the hundredth; (2) Efficiency — at equivalent wire feed speeds and current levels, the G168's programmed travel speed optimization and continuous arc-on time produce 3–4× higher productivity than manual SMAW and measurably higher than semi-automatic FCAW where arc interruptions for welder repositioning reduce effective arc-on time; (3) Documentation — stored digital programs provide the parameter traceability required for modern pipeline QA documentation, whereas semi-automatic FCAW relies on welder compliance with the written WPS. The trade-off is that the G168 requires track installation time (≤1 minute per joint) and initial program qualification, which are offset by production efficiency gains on joint counts above 20–30 joints of the same specification.\u003c\/p\u003e\n\u003c!-- ── 8. CTA ───────────────────────────────────────────────────── --\u003e\n\u003cp\u003eFor project-specific configuration, groove design consultation, welding procedure development, or quotation on the G168 welding head with KEMPPI power control system, track sets, and wireless remote control unit, contact FYID-Feiyide's applications engineering team. On-site commissioning and operator training support are available for all G168 deployments.\u003c\/p\u003e\n\u003c!-- ── 9. 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