API 5L Carbon steel welded pipe ERW 1.steel grade: Q195-Q345 2.OD:20mm- ... ,JIS,GB 4.best price API 5L Carbon steel welded pipe ERWMaterial:Q195,Q215,Q235,Q345 Size: OD16-1420mm ,thickness: ... Straight and reducing tee.6)Plate and butt welded steel pipe flange. Material:10#,20#,45#,A106,A53,Q195,Q215,Q235 ... ,Q345,ST37,ST37.4,ST52,16Mn Standard:ASTM,API,DIN,JIS,GB/T Outer diameter ...