Orbital TIG system for stainless-steel heat-exchanger U-tube welding. Select the U-Series welding head for the actual tube dimensions and joint. The family covers tube OD 12.7-25 mm; each selected head has its own size. Socket joints require combined wall thickness at most 1.6 mm; butt joints require wall thickness at most 1.6 mm. Minimum thickness and weld suitability require trial-weld confirmation. Autogenous TIG process without filler wire. Suitable materials include 304, 316L and duplex 2205 stainless steel, subject to procedure confirmation. Standard preparation: 5-10 working days, subject to stock and factory schedule. Custom lead time after technical review; shipping time additional. Packaging: two aviation aluminum cases. Trade unit: one configured system; confirm configuration and order quantity with sales. Price on request. Reference official storefront price: USD 7600 per selected configured system, EXW; freight, taxes and duties additional. Confirm final configuration and quotation with sales. Payment: T/T, 100% in advance or 50% deposit with balance before shipment. Website: https://fyid-feiyide.com/.