Abstract: The super duplex stainless steel pipe UNS S32750 was used Jumper material from the umbilical termination head to the subsea tree for water injection in the subsea wellhead project of a offshore platform. In order to ensure product performance, the appropriate welding parameters of GTAW were used to conduct experimental research on single-sided welding and double-sided forming welding process before the production of the product by analyzing the welding characteristics of the material. The experimental results show that when the diameters of the welding material ER2594 was 2.0mm, the shielding gas was 99.99% Ar, the flow rate of protective gas on the front of the weld seam was 8～12L/min, the flow rate of protective gas on the back of the weld seam was 10～15L/min, as well as the welding current of 65～80A, the welding voltage of 12～13V, the welding speed of 65～70mm/min, the heat input of 0.67～1.08kJ/mm, and the maximum interlayer temperature of 150℃, the mechanical properties, metallographic structure, ferrite phase ratio, and pitting corrosion resistance of welded joints all meet the requirements of relevant standards. The GTAW welding process developed through research was also successfully applied in the on-site welding construction of jumper.