Automatic Pipe Welding Machine, Pipe automatic welder 1)Automatic root pass, fill, and cap pass Automatic Pipe Welding MachineSuitable for industries of: OIL AND GAS, REFINERY FACILITIES, ... , Rotary Engineering, Petrol Steel, CNPC, SINOPEC, CNOOC, CNCEC, etc.Automatic small pipe welding station consists of welding manipulator, elbow welding machine, power source, self ...