Carbon Steel seamless pipeStandardANSI,ISO,API.DIN,GB.MaterialA106 Gr A,B,A53 Gr B,A333 Gr 6,A335 P11,A335 P22,TP304,TP321,TP316,TP304L,TP316L,A335 P5,ST37,ST35.8,ST52,1.0309,OD1/4"-80",13mm-2000mmWTCCH5,SCH10,SCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXSUsageStructure Use,water transport,Building,Machinery,Traffic,Aviation,Oil..