A, use Used for exhaust pipe of the girth welding, through the simple adjustment and fast changing the fixture and can adapt to the similar product girth welding. Second, the way to work The control system adopts imported PLC programmable controller, all welding procedure of automatic control. The melting extremely rich oxygen gas shielded welding technology to artificial stevedore parts, welding torch fixed and workpiece rotary way of working, automatic complete workpiece welding. Three, safety protection Special plane USES the steel plate fully enclosed structure form, manual operation area using screen monitor safety protection. Adopt the hands start button, make the front door is fully closed, the special plane can run welding. Special maintenance door and electrical control cabinet with safety interlocking device, make the special plane in completely cut off power supply open, to ensure safety. Welding power source in special plane top, welding power source current, voltage and regulation can be in the operation of the special control panel convenient adjustment and display, make the special plane totalization, save covers an area of space