1.Thickness:SCH10-XXS 2.Qualification:ISO9001,CE,API 3.Material:Carbon Steel,Alloy Steel,Stainless 4.Certificate:CE API 4 inch seamless stainless steel pipe SpecificationsChina StandardSteel GradeStandardseamless steel tubesGB/T8162-199910, 20, 35, 45, 40Mn2, 45Mn2, 27SiMn, 20Cr, 40Cr, 20CrMo, 35CrMo, 38CrMoA1, 50CrV, 30CrMnSiASTM A500-98and pipesASTM A501-98for structural purposeASTN A519-98 JIS ...