1/4''-24'',13mm-610mm,carbon steel pipe welded pipe ... pipe StandardASTM A106 GRB/API5LGRB/ASTMA53GRB DIN ANSI GB SH HG APIMaterialGRB20#STEEL,A3,A234,ASTM,Q235,Q345,10 ... #,45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1/4''-24'',13mm-610mmWTSCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXSUsagePetroleum ... high security, highly pressurized, widely usedMin order3 tons 1/4''-24'' carbon steel pipe