... Standard: BS,GB,ASTM Welding steel pipe Production Round shape Welded Pipe/Tube Specification andWall Thickness 281.0- ... GB/T8162,GB/8163,ASTM A106-2006 Grade 10#,20#,45#,Q235,Q195,Q215Length1-6m, or as customers ... steel pipeSteel casingTubingHot-rolled steel pipeHot-galvanized steel pipe Advantages of our company in the industry:1 ... Hign-frequency longitudinal welded steel tube,oil and gas pipe welding