... /2" to 24"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 ,etcmaterialCarbon ... Steel :ASTM A106/ A53 ASTM A 179 Gr.A/B, API5L Grade X42/X46 ...