1/4''-24'',13mm-610mm,carbon steel pipe welded pipe galvanized pipe, seamless steel pipe spiral steel pipe alloy pipe Typecarbon steel pipe welded pipe galvanized pipe, seamless steel pipe spiral steel pipe alloy pipe StandardASTM A106 GRB/API5LGRB/ASTMA53GRB DIN ... APIMaterialGRB20#STEEL,A3,A234,ASTM,Q235,Q345,10#,45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1/4''-24'',13mm-610mmWTSCH20,SCH40,SCH60,SCH80, ...