... require 4.Grade:10#-45#,Q195-Q345 5.Standard: BS,GB,ASTM welded steel pipe Production Round welded tube Specification andWall Thickness 401 ... 10217,GB/T8162,GB/8163,ASTM A106-2006 Grade10#,20#,45#,Q235,Q195,Q215Length1-6m, or as customers requestmentsToleranceA)Outer diameter ... . We look forward to working with you. Cold rolled round seamless steel tube&pipe in 100 diameter