API 5L Carbon steel welded pipe ERW 1.steel grade: Q195-Q345 2. ... ,GB 4.best price API 5L Carbon steel welded pipe ERWMaterial:Q195,Q215,Q235,Q345 Size: OD16-1420mm , ... and reducing tee.6)Plate and butt welded steel pipe flange. Material:10#,20#,45#,A106,A53,Q195, ... and the mechanical and construction industries, used in chemical industry, heating, road marking, piling, machine-processing, etc. API 5L/ ...