The torch is designed for the pipe and the pipe plate automatic TIG welding hole design, suitable for the inner hole of the tube plate form Automatic welding . Can tubesheet joint welding of carbon steel, stainless steel and so on various forms of pipe / filler wire. The diameter range of the pipe hole to more than o 19mm. With iOrbital5000 controlled welding power supporting the use of precision for all position TIG inner hole welding, welding results in high repeatability and can achieve ideal welding effect. Mainly used in petrochemical, boiler, military and nuclear power industries.