External diameter: Max.508mm(20inch), Steel grade: Max X80 Meet with ... 5L, API 5CT,ASTM A53 Grade A&B standardRange of external diameter: 60mm-610 mm FF forming/roller row forming/FFX ... row Foming machine, Squeeze roller unit, HF welder, internal and external burr removing unit, Polisher unit, Pipe (online) ultrasonic tester, IF ...