Size: 1/2" - 72" Thickness: SCH20-XXS Material: carbon steel (seam ,seamless helical, galvanized) Qualification: ISO9001, API Size:from 1/2" to 72" Thickness:SCH20, SCH30, SCH40, STD, SCH80, SCH100. SCH120, SCH160. XXSMaterial:carbon steel (seam ,seamless helical, galvanized)Qualification: ISO9001, API, CE,Packing:in bundleSpecial design available as the requirements of customer steel pipe