{"product_id":"u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling","title":"FYID U12-U25 自動 U ベンドチューブ軌道溶接機 (AI データセンター冷却および熱交換器用)","description":"AI データセンター用の U ベンドチューブ軌道 TIG 溶接機 液冷および熱交換器チューブバンドル — Φ9 mm ～ Φ25 mm 合計肉厚 ≤1.6 mm のソケット溶接\nFYID-Feiyide FXT20 Pro + U シリーズは、U ベンド管と直管の間の円周すみ肉溶接、つまり熱交換器の U 字管バンドル、AI データセンター液冷モジュール、製薬用二重管熱交換器に見られる「チューブインチューブ」ソケット ジョイントの形状を目的として構築された自動軌道 GTAW (TIG) 溶接システムです。\nこのシステムは、FXT20 Pro プログラマブル電源 (5 A ～ 200 A DC、パルス モード) と C12、C16、C20、または C25 U ベンド溶接ヘッドを組み合わせて、それぞれ最大 Φ12、16、20、または 25 mm の直管外径をカバーし、ソケットの合計壁厚 ≤ 1.6 mm をカバーします。溶接ヘッドの馬蹄形の構造には、38 mm (C12\/C16) ～ 60 mm (C25) の最小チューブ中心間隔が必要で、データセンターの冷却インフラストラクチャで使用されるほとんどのシェルアンドチューブおよびプリント回路熱交換器の標準正三角形チューブ ピッチ内に収まります。\nUベンド継手に対応した汎用の軌道溶接機ではありません。 FXT20 Pro + U シリーズは、このジョイント形状に特有の 3 つの故障モードに向けてゼロから設計されました。回転中のチューブ内表面のアーク長の不安定性、ソケットの薄い組み合わせ壁厚による焼き付き、オーバーヘッド通過中の 316L ステンレス鋼内壁のアルゴン保護が不十分です。それぞれは、以下の仕様で説明されている特定の設計機能 (完全な閉ループ サーボ回転、最小 5 A のアーク開始、デュアル チャネル統合アルゴン保護) によって対処されます。\nデータセンター液冷ループ配管の直管ガース溶接 (U ベンドソケットジョイントではない) については、薄肉アプリケーションで Φ6.35 mm ～ Φ168 mm のチューブ外径をカバーする C シリーズ密閉型ヘッドを備えた FXT20 を参照してください。\n\nFXT20 Pro + U シリーズ システム仕様 — 電源および U ベンド溶接ヘッド モデル\nFXT20 プロ電源\n\nパラメータ\n仕様\n\n\n溶接工程\n自己生成 GTAW (TIG) — DC およびパルス モード\n\n\n出力電流範囲\nDC5A～200A\n\n\n最小アーク開始電流\n5 A (≤1.6 mm の結合壁でのバーンスルーを防止)\n\n\n電流の種類\nDC \/ パルス — ピーク電流とベース電流を個別に調整可能\n\n\n入力電圧\nAC220V±10%またはAC110V（選択可能）\n\n\n周波数\n50\/60 Hz 自動適応\n\n\n消費電力\n4.5KVA\n\n\nHMIディスプレイ\n10 インチ カラー タッチスクリーン、中国語\/英語\n\n\n溶接ゾーン\n円周溶接ごとに最大 8 つの独立したゾーン\n\n\nストアドプログラム\n200グループ\n\n\nデータ出力\n溶接パラメータプリンタを内蔵。 USBエクスポート\n\n\n回転駆動\n高分解能エンコーダを備えたフルクローズドループサーボモーター\n\n\nドライブの応答時間\n\u003c1 ms (ステッピング モーターと比較して、ステップ損失のリスクを排除)\n\n\nトーチの冷却\n循環水（流量≧600ml\/min、0.3MPa）\n\n\n標準ケーブル長さ\n8メートルのフレキシブルケーブル\n\n\n認証\nCE、ISO 9001\n\nC シリーズ U ベンド溶接ヘッド — 接合部の形状要件\n\n頭部モデル\n直管最大外径\n合計壁厚\n最小チューブ中心間隔\n最小直管延長量\nヘッド重量\n\n\nC12\n≤ Φ12mm\n≤ 1.6 mm\n≧38mm\n管板面から ≥ 36 mm\n1.5kg\n\n\nC16\n≤ Φ16mm\n≤ 1.6 mm\n≧38mm\n管板面から ≥ 36 mm\n2.0kg\n\n\nC20\n≤ Φ20mm\n≤ 1.6 mm\n≧54mm\n管板面から ≥ 36 mm\n3.0kg\n\n\nC25\n≤ Φ25mm\n≤ 1.6 mm\n≧60mm\n管板面から ≥ 36 mm\n3.5kg\n\nU ベンドの挿入と取り付けの要件\nUベンド管は直管内に8mm以上挿入します（直管端面から測定）。ソケットの挿入ギャップは、薄い壁の厚さの 10% 以下です。ほとんどの用途では、ギャップゼロが目標です。回転中に一定の円弧長を維持するには、直管の真円度が 5% 以下である必要があります。溶接ヘッド軸に対するチューブ軸の直角度偏差は 5°以下でなければなりません。これらの公差は保守的なものではありません。アークの長さはヘッドの形状によって決まるため、チューブの真円度と直角度が 360° 回転全体にわたるアークの安定性を直接決定します。チューブのピッチと直管の延長高さを特定のヘッドモデルの形状に照らして検証する必要があるため、FYID-Feiyide では、注文前に、溶接のアクセス性を確認するために実際のチューブシートの図面を提出することを顧客に推奨しています。\n溶接前拡張プロセスの互換性\nFXT20 Pro + U シリーズは、ASME セクション VIII、GB\/T 151、およびその他の熱交換器製造規格で要求される溶接前拡張シーケンス向けに設計されています。 5 A ～ 200 A の範囲のパルス TIG の低入熱とゾーンごとの正確な電流制御を組み合わせて、熱の影響を受けるゾーンを最小限に抑えた溶接を生成します。その後のチューブ拡張時にジョイントに亀裂が入りません。溶接前に膨張が行われると、管と管板の環状隙間に空気が閉じ込められますが、溶接中の閉じ込められたガスの熱膨張により溶接ルートに気孔が発生します。 FXT20 Pro + U シリーズのドキュメント出力は、溶接してから拡張するシーケンスを義務付ける規格への準拠をサポートします。\n\nIndustry Applications for the FXT20 Pro + U-series U-Bend Orbital Welding System\nAI Data Center Direct Liquid Cooling — GPU Cluster Cold Plate Loop Manifolds\nHigh-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 + U-series is designed to weld.\nThe 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 + U-series'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.\nThe 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.\nShell-and-Tube Heat Exchangers — U-Tube Bundle Fabrication for Industrial and HVAC Applications\nShell-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.\nManual 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 + U-series'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.\nCompatible 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.\nCentral Air Conditioning — Evaporator and Condenser U-Tube Prefabrication\nCentral 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.\nThe FXT20 Pro + U-series 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.\nFor 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 + U-series's oxide-free weld interior is the technically correct specification. Compatible tube: 316L stainless steel, copper-nickel alloys. Tube OD Φ9 mm – Φ25 mm.\nPharmaceutical Double-Tube Heat Exchangers — GMP Hygienic U-Bend Welding on 316L Stainless\nDouble-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.\nThe FXT20 Pro + U-series'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.\n\nFXT20 Pro + U-series U-Bend Orbital Welder — Frequently Asked Questions\nWhat is the difference between the FXT20 Pro + U-series U-bend welder and the standard FXT20 with C-Series heads?\nThe standard FXT20 with C5–C170 enclosed heads 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.\nThe FXT20 Pro + U-series 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.\nWhy does the FXT20 Pro + U-series use full closed-loop servo drive rather than a stepper motor?\nDuring 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.\nThe FXT20 Pro + U-series'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.\nHow does the dual-channel argon protection work, and why is it necessary for 316L stainless steel U-bend joints?\nThe FXT20 Pro + U-series 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.\nAustenitic 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.\nWhat tube center spacing does the welding head require, and how do I know if my tubesheet layout is compatible?\nThe 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.\nStandard 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.\nCan the FXT20 Pro + U-series weld copper-alloy tube in addition to stainless steel?\nThe FXT20 Pro + U-series 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.\nWhat documentation does the FXT20 Pro + U-series produce for heat exchanger quality records and pressure vessel inspection?\nThe FXT20 Pro + U-series 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.\n\n管板のアクセス可能性の確認、管の外径とピッチの検証、またはプロジェクト固有の U ベンド接合部の評価については、管板の図面を添えて、FYID-Feiyide のアプリケーション エンジニアリング チームにお問い合わせください。 C12、C16、C20、および C25 溶接ヘッドは、すでに FXT20 Pro 電源を使用している操作に個別に使用できます。ご要望に応じて、標準以外のチューブピッチ用のカスタムヘッド形状も 20 ～ 30 営業日のリードタイムでご利用いただけます。","brand":"FYID-Feiyide","offers":[{"title":"FXT20 Pro \/ U12","offer_id":51647234244890,"sku":"FYID-FXT-FXT20PRO-U12","price":16560.0,"currency_code":"USD","in_stock":true},{"title":"FXT20 Pro \/ U16","offer_id":51647793791258,"sku":"FYID-FXT-FXT20PRO-U16","price":16560.0,"currency_code":"USD","in_stock":true},{"title":"FXT20 Pro \/ U20","offer_id":51647793824026,"sku":"FYID-FXT-FXT20PRO-U20","price":16560.0,"currency_code":"USD","in_stock":true},{"title":"FXT20 Pro \/ U25","offer_id":51647793856794,"sku":"FYID-FXT-FXT20PRO-U25","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","url":"https:\/\/fyid-feiyide.com\/ja\/products\/u-bend-tube-orbital-welding-machine-c12-c25-ai-cooling","provider":"FYID-Feiyide","version":"1.0","type":"link"}