1) Type: ERW 2) Material: Q195, Q215, Q235, Q345, X52, ... certificate and the right to use the logo ERW steel pipe:1) Type: ERW2) Material: Q195, Q215, Q235, Q345, X52, ... : ANSI,ASME, ASTM,JIS,DIN,GB4) Pipe end: A) Threaded and coupling B) Plain end C)Both inner or outer welded stab can ... be removed5) Dimension of the pipe: A)Outside diameter: ...