API 5L Carbon steel welded pipe ERW 1.steel grade: Q195-Q345 2.OD:20mm-329mm 3. ... ASTM,DIN,JIS,GB 4.best price API 5L Carbon steel welded pipe ERWMaterial:Q195,Q215,Q235,Q345 Size: OD16-1420mm , ... 6)Plate and butt welded steel pipe flange. Material:10#,20#,45#,A106,A53,Q195,Q215,Q235,Q345,ST37,ST37.4,ST52,16Mn Standard ... , road marking, piling, machine-processing, etc. API 5L/A53 welded steel pipe