... )standard :GB,ASTM ,DIN, 2)grade:10#,20#,45#,16Mn,Q345,Q195,Q215 3)outer diameter :21.3-219mm thickness:0.9 ... thickness:0.9-8.5mmLength:6meter or customized.Steel Grade:ST37/2,Q195,Q215,20#,Q345 etrc.STANDARD:ASTM A53GrA,GrB,BS1987-1985 ... id: lctrgg_exporting(at)lchzgg(dot)com Welcome you inquire in steel pipe and discuss with you together!! ERW Q345 sch30 seamless carbon steel pipe