... Wall thicknessSCH5S to SCH160, XS, XXSThickness ToleranceInternational standards : +-12.5% ,If the customer must shrink tolerance, we can do ... according to customer's requirements.standardsANSI ,ASTM, API ,DIN ,JIS ,BS ,ISO ,GB, SH, AND, SH ... 450C) etcSteel gradeQ195,Q195L,Q235 and so on PackingPlastic steel pipe cap ,plastic bag, steel strip bundledCertificateAPI, CCS, ISO9001: ...