The 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, C10, C40, C80, C120, C170 - covering tube outer diameters from OD 3.175 mm to OD 168 mm and wall thicknesses from 0.5 mm to 3 mm.
The C-Series welding head encloses the full tube joint inside a sealed argon chamber during welding. The 360 deg argon atmosphere helps limit 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 - with reduced post-weld cleaning needs when purge and acceptance criteria are confirmed.
One FXT20 power source drives all six C-Series head models interchangeably. A fabrication shop handling multiple tube specifications - from 1/4" instrument tubing to 6" process headers - operates the full diameter range from a single power source, switching heads in under 10 minutes between jobs. The 200-group recipe library on the 10-inch industrial PLC + touchscreen interface stores every validated procedure for instant operator recall.
Built-in micro printer for compliance
The FXT20 includes a built-in micro printer and USB port is treated as firmware/update only per KB; data output should be confirmed by configuration for per-weld documentation - current, speed, duration, and timestamp per FXT20 KB that supports ASME BPE, FDA cGMP, GMP, and EHEDG audit traceability. The 12-segment programmable per-zone current control allows precise heat-input shaping through pre-flow, arc initiation, steady-state, decay, and post-flow phases - the parameter resolution required by titanium and Alloy 600/690 high-purity work.
Why it pairs with C-series and PT40 (but not K-series)
The FXT20 is engineered for thin-wall enclosed welding regimes - 0.5-3 mm wall, 5-200A current, autogenous (no filler wire), single-phase 220V. It drives the six closed-chamber C-Series heads and the PT40 tube-to-tubesheet head for boiler and heat exchanger work. K-series open-head clamps and PT80 tube-to-tubesheet heads run on the separate FXT40 Pro industrial power source (three-phase 380V, 5-400A, with filler wire feeder) - required for the 2-13 mm wall industrial pipe these heads address.