... : ERW Pipe Production Line/ERW Pipe Mill/ERW Pipe Making MachineExternal diameter: Max.Φ508mm(20inch)Steel grade: Max X80Steel ... FF/FFX/Roller row Foming machine, Squeeze roller unit, HF welder, internal and external burr removing unit, Polisher unit, Pipe (online) ultrasonic tester, ... controller, meet with DIN, JIS and GBERW Pipe Mill type (Only for reference, can be desiged according to your ...