FYID CM Series Planetary Pipe Cutting Machine — Cold Saw for Stainless Steel & Carbon Pipe, Φ6–330 mm

Planetary Cold Saw Pipe Cutting Machine for Orbital Welding Pre-Processing — Φ6 mm to Φ330 mm, Stainless Steel, Carbon Steel, Titanium, and Plastic Pipe

The FYID-Feiyide CM Series is a range of portable planetary pipe cutting machines for cold-process circumferential cutting of stainless steel, carbon steel, copper, aluminium, titanium alloy, and thermoplastic pipe. Five models — CM3, CM4, CM6, CM8, and CM12 — cover pipe outer diameters from Φ6 mm (¼") to Φ330 mm (13"), wall thicknesses from 1 mm to 5 mm, with machine weights starting at 20 kg for the CM3.

The planetary cutting mechanism rotates the blade circumferentially around the stationary pipe — the pipe does not rotate, the cutting head orbits. This configuration produces a pipe end face with perpendicularity error controlled within industry standards for automatic welding fit-up, a surface finish ready for direct orbital TIG welding without secondary grinding, and zero heat-affected zone. No thermal distortion, no oxidation scale on the cut face, no hardened edge layer that would interfere with weld penetration — all three are failure modes of angle grinder and thermal cutting methods that the CM Series eliminates.

The CM Series is the upstream pre-processing tool in the FYID orbital welding system chain: CM cuts the pipe to length with a qualified end face → split-frame beveling machine prepares the groove for heavy-wall joints → FXT20 closed-head orbital welder or FXT40 Pro open-head orbital welder completes the girth weld. End-face quality from the CM directly determines first-pass weld quality from the orbital system downstream.

CM Series Specifications — Five Models Covering Φ6 mm to Φ330 mm

Model range and pipe diameter coverage

Common specifications across all CM models

Compatible pipe materials

The CM Series cuts all common pipe materials used in industrial and sanitary piping without blade changeover for most transitions between material groups: stainless steel (304, 316L), carbon steel, galvanised steel, copper, aluminium, titanium alloy (special coated blade required), cast iron, and thermoplastics (PE, PP, PVDF, PVC). For titanium alloy, a special coated blade must be specified at time of order — the standard Type 6872 blade is not rated for titanium cutting speeds and hardness.

Blade selection by wall thickness

Industry Applications for the CM Series Planetary Pipe Cutting Machine

Semiconductor and Electronic Clean Piping — Burr-Free End Face for UHP Orbital Welding Fit-Up

Semiconductor UHP gas delivery piping in 316L EP-grade stainless steel uses tube OD from Φ6.35 mm (¼") to Φ38.1 mm (1½"), with wall thicknesses from 0.65 mm to 2.0 mm. At these dimensions, the end face quality after cutting is the single most important variable that determines whether the orbital weld achieves SEMI F20-compliant internal cleanliness. An end face cut by an angle grinder introduces three failure modes for the downstream orbital weld: angular misalignment (perpendicularity error) that creates an asymmetric root gap; grinding debris contamination of the tube bore that cannot be fully removed by pre-weld purging; and work-hardening of the cut face surface that causes inconsistent arc initiation on the first segment of the weld cycle.

The CM3 planetary cold cut eliminates all three. The blade orbits the stationary tube at controlled speed matched to the 316L wall thickness, producing an end face perpendicular within the tight tolerance required for zero-gap orbital TIG fit-up, with no debris generation inside the tube bore and no thermal or mechanical surface hardening. For semiconductor gas cabinet (BCU) prefabrication and UHP gas line installation where every joint is inspected to SEMI F20 particle counts, the CM3's 20 kg portable weight allows it to be positioned at the gas cabinet assembly bench alongside the FXT20 orbital welding system as a continuous pre-processing station.

Compatible tube: EP-grade 316L stainless steel, Φ6 mm – Φ80 mm OD (CM3), wall 0.65 mm – 2.0 mm. Relevant standards: SEMI F20, SEMI F57, SEMI C10.

Pharmaceutical and Food-Grade Sanitary Piping — GMP-Compatible Cold Cutting on 316L Stainless

Pharmaceutical and food-grade sanitary piping systems in 316L stainless steel require end faces prepared to ASME BPE fit-up tolerances: square, burr-free, with an internal bore edge that will not trap particles or create a crevice when the orbital weld joins the two tube ends. Thermal cutting methods — angle grinder, plasma, or saw — produce end face conditions that require secondary grinding and deburring before orbital welding fit-up, adding process steps and introducing contamination risk in a GMP environment where particulate control is a regulatory requirement.

The CM Series cold cutting process produces a GMP-ready end face in a single operation. No secondary grinding is required before fit-up for the FXT20 enclosed orbital welder on tube wall thicknesses up to 3 mm. For larger-diameter sanitary headers — Φ50.8 mm (2") to Φ114.3 mm (4.5") — the CM4 and CM6 cover the full range used in CIP/SIP piping, WFI distribution loops, and product transfer lines. The absence of thermal input in cold cutting means no heat-affected zone and no carbon migration at the cut face, maintaining the corrosion resistance of 316L stainless steel that GMP stainless piping specifications require.

Compatible tube: 316L, 304L stainless steel. CM3: Φ6 – 80 mm; CM4: Φ12 – 120 mm; CM6: Φ16 – 171 mm. Relevant standards: ASME BPE, 3-A Sanitary Standard No. 63-03, FDA 21 CFR Part 177, EHEDG.

Petrochemical and Industrial Pipeline Installation — On-Site Portable Cold Cutting for Carbon Steel

Petrochemical pipeline installation and maintenance projects require pipe cutting on-site — in pipe alleys, in equipment rooms, at elevated working platforms, and in confined spaces where fixed pipe saws and lathes cannot be positioned. Angle grinder cutting is the default field method, producing end faces that require manual grinding to achieve the perpendicularity and surface finish needed for automatic orbital welding fit-up, adding 15 to 30 minutes of secondary preparation per joint on a project schedule where joint count determines project duration.

The CM Series portable design — CM3 at 20 kg, CM6 at 56 kg on an optional tripod-and-lifting-platform setup — enables cold cutting at the installation point without pipe removal or secondary surface preparation. For carbon steel pipe in ASME B31.3 process piping service where 100% radiographic inspection applies, the end face perpendicularity from CM planetary cutting directly reduces the risk of incomplete fusion at the root pass that an angular misaligned fit-up produces. The CM6 detachable front guard supports cutting of pipe fittings — elbows and tees — in addition to straight pipe, without requiring the fitting to be removed from the spool assembly. The CM6 auxiliary claw quick-detach design eliminates complex adjustment for beveling operations following the cut.

Compatible materials: carbon steel (A106, API 5L), galvanised steel, stainless steel. CM6: Φ16 – 171 mm; CM8: Φ55 – 228 mm; CM12: Φ140 – 330 mm. Relevant standards: ASME B31.3, ASME B31.4, EN 13480.

Shipbuilding and Marine Piping — Non-Ferrous and Mixed-Material Pipe Cutting in Confined Spaces

Shipbuilding pipe fabrication involves mixed material schedules — carbon steel, copper-nickel (Cu-Ni 90/10, 70/30), aluminium, and stainless steel — in OD ranges from Φ20 mm to Φ228 mm for ballast, fuel, seawater cooling, and machinery space piping systems. Ship hull geometry creates confined spaces where fixed pipe saws cannot be positioned and where angle grinder use generates spark and fire risk near flammable materials in the ship's fuel and paint environment. Planetary cold cutting produces no sparks and no open flame, meeting the fire prevention requirements for cutting operations in ship compartments during new construction and in-service maintenance.

The CM Series' non-ferrous blade compatibility — copper, aluminium, Cu-Ni alloys all cut with the standard Type 6872 blade — eliminates the need for separate cutting equipment for different pipe materials on a mixed shipbuilding pipe schedule. The CM8 (56 mm – 228 mm) covers the primary pipe diameter range for ship power plant and ballast system piping. At 75 kg net weight with optional tripod support, the CM8 is repositionable between pipe bays by a two-person crew without lifting equipment. For the orbital TIG girth welds following CM8 cutting on ship piping, the FXT40 Pro with K219 or K273 open-head clamps covers the Φ114 mm – Φ273 mm range.

Compatible materials: carbon steel, copper, copper-nickel, aluminium, stainless steel. CM8: Φ55 – 228 mm. Application: shipbuilding new construction, in-service maintenance, naval pipe fabrication.

HVAC and Municipal Infrastructure — Plastic, Copper, and Cast Iron Pipe Cutting

HVAC system installation and municipal water/drainage infrastructure involve plastic pipe (PE, PP, PVDF, PVC) and copper pipe in OD ranges from Φ20 mm to Φ171 mm, alongside carbon steel and cast iron. Plastic pipe cutting with angle grinders or handsaws produces irregular end faces with edge deformation that causes misalignment at fused or welded joints. Cast iron cutting requires a blade that can handle hard, brittle material without chipping — the CM Series planetary mechanism applies controlled radial blade force at low rotational speed, cutting cast iron without the edge chipping and blade deflection that angle grinders cause at higher peripheral speeds.

The CM3 (Φ6 – 80 mm, 20 kg) and CM4 (Φ12 – 120 mm, 46 kg) cover the standard copper pipe and small-bore PE ranges used in HVAC refrigerant and chilled water systems. The CM6 (Φ16 – 171 mm) covers the municipal PE and PVC ranges for water main connections and drainage piping. The 6-speed electronic speed regulation on all CM models allows the operator to select the correct rotational speed for the pipe material — lower speeds for hard materials like cast iron, higher speeds for soft materials like PE — without blade or equipment changeover. For HVAC copper pipe that will be TIG-welded rather than brazed at the joint, the CM3 end-face quality eliminates the pre-weld deburring step that copper brazing typically requires.

Compatible materials: PE, PP, PVDF, PVC, copper, cast iron, carbon steel. CM3: Φ6 – 80 mm; CM4: Φ12 – 120 mm; CM6: Φ16 – 171 mm.

CM Series Planetary Pipe Cutting Machine — Frequently Asked Questions

What is the difference between planetary cold cutting and angle grinder cutting for orbital welding pre-processing?

An angle grinder cuts by abrasive contact at high peripheral speed, generating heat that creates a heat-affected zone (HAZ) at the cut face, oxidation scale on stainless steel, and mechanical surface hardening that interferes with arc initiation in orbital TIG welding. End face perpendicularity from angle grinding depends on the operator's technique and varies joint to joint. Secondary grinding and deburring are always required before orbital welding fit-up.

The CM Series planetary mechanism rotates the blade circumferentially at 85 – 210 RPM around the stationary pipe, producing no heat-affected zone, no oxidation, and no surface hardening. End face perpendicularity is controlled by the machine geometry, not operator skill. No secondary preparation is required before orbital welding fit-up on wall thicknesses up to 5 mm. This eliminates 15 – 30 minutes of secondary preparation per joint that angle grinder cutting adds to a pipe fabrication schedule.

Which CM model do I need for my pipe OD?

CM3 covers Φ6 mm – Φ80 mm (¼" – 3") and is the correct model for semiconductor instrument tubing, small-bore pharmaceutical sanitary tube, and HVAC copper pipe up to 3". CM4 covers Φ12 mm – Φ120 mm (½" – 4.5") for pharmaceutical process piping and small industrial pipe. CM6 covers Φ16 mm – Φ171 mm (⅝" – 6.5") and is the most versatile model for general industrial piping, including the front guard removal option for elbow and tee cutting. CM8 covers Φ55 mm – Φ228 mm (2" – 9") for shipbuilding and large industrial pipe. CM12 covers Φ140 mm – Φ330 mm (5.5" – 13") for large-diameter transmission and structural pipe. If your pipe OD falls in an overlap zone (e.g., Φ80 mm – Φ120 mm), the CM4 is the lower-weight option; if portability is the priority, choose the smaller model.

Does the CM Series cut titanium alloy pipe?

Yes, but a special coated blade must be specified at time of order. The standard Type 6872 blade is rated for stainless steel, carbon steel, copper, aluminium, cast iron, and thermoplastics. Titanium alloy requires a special blade matched to titanium's hardness and cutting heat characteristics. Specify the pipe material as titanium at time of order so the correct blade is included in the standard packing list. For titanium tube welding after cutting, the FXT20 enclosed orbital welder provides the full inert gas coverage that titanium welding requires.

How long does blade replacement take, and what blade is included?

Blade replacement takes under 3 minutes using the included 22 mm open-end wrench — no disassembly of the cutting head is required. Each CM unit ships with 2 standard Type 6872 blades. For high-production environments, FYID-Feiyide recommends stocking 5 – 10 additional blades indexed to the primary pipe material in use. Blade consumption rate depends on pipe material and wall thickness: stainless steel and carbon steel in the 3 – 5 mm wall range consume blades faster than thin-wall or soft materials.

Can the CM Series cut pipe fittings — elbows and tees — in addition to straight pipe?

The CM6 model includes a detachable front guard that allows the cutting head to access pipe fittings including elbows and tees without removing the fitting from the spool assembly. The CM4 to CM12 range also supports auxiliary claw configurations for fitting cutting — these must be selected according to the fitting OD at time of order. The CM3 is optimised for straight pipe cutting only in its standard configuration.

What is included in the standard packing list, and what does the customer need to supply?

Each CM unit ships with: main unit with base and clamping mechanism, motor assembly (separate box packaging), 2× Type 6872 cutting blades, hex key set, and user manual with certificate and warranty card. Customer-supplied items: power connection (220 V, 50/60 Hz), safety glasses and work gloves (mandatory during operation), hearing protection, and additional blades indexed to production volume. Optional accessories ordered separately: tripod and lifting platform for field use without a fixed bench; special material blades for titanium or high-hardness pipe; auxiliary claw kit for CM4 – CM12 fitting cutting.

The CM Series is available as standalone units or as part of the FYID one-stop pipeline pre-processing and orbital welding system: CM pipe cutting machine + split-frame pipe beveling machine + FXT20 or FXT40 Pro orbital welding system. Contact FYID-Feiyide's applications engineering team to specify the correct CM model for your pipe OD range and production volume.