Automatic Elbow Welding Machine 1)Zero-balance weight design 2)Automatic root pass, fill, ... &T, PEC, Rotary Engineering, Petrol Steel, JSL, ETC.Automatic Elbow Welding MachineFeatures: 1Zero-balance weight design2Suitable for pipes from O. D ... . 2" to 48"3TIG/MIG/SAW are optional4Automatic root pass, fill, and cap pass5PLC system ...