... with API 5L, API 5CT ,ASTM A53 Grade A&B Description: ERW Pipe Production Line/ERW Pipe Mill/ERW Pipe Making ... MachineExternal diameter: Max.Φ508mm(20inch) Steel grade: Max X80Steel material: Carbon steelMeet with API 5L, API ... , internal and external burr removing unit, Polisher unit, Pipe (online) ultrasonic tester, IF annealing unit, Air coolant ...