... .more grades of material 3.professional for years Carbon Steel seamless PipeStandardANSI,ASTM ,API.DIN,GB.JISMaterialA106 Gr A,B,A53 ... .0309,OD1/4"-40",13mm-1000mmWTSCH5,SCH10,SCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXSUsageStructure Use,water transport,Building,Machinery,Traffic ... steel strip,bundles,Caps , plastic wrap,loading belt ASTM A106 seamless steel pipe