This system is a special system designed for TIG welding of pipe/pipe flanges,and is suitable for automatic welding in the form of general pipe flanges.According to the needs of the welding process,single-position or all-position welding can be achieved;butt welds can be welded,and fillet welds can be welded;self-fusion,wire filling,or self-fusion and wire filling can be selected,which is convenient,fast and labor-saving.It can be placed vertically or horizontally.This machine can be used together with iArc400,408 programmable welding power source,and is suitable for automatic welding of special pipes,pipes and pipe flanges in locomotives,construction machinery and other industries.