1/4''-24'',13mm-610mm,carbon steel pipe welded pipe galvanized pipe, seamless ... ,Q235,Q345,10#,45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1/4''-24'',13mm-610mmWTSCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXSUsagePetroleum, Smelting ... :<0.30%,SI:>0.10%,MN:0.29-1.06%,P:<0.035%,S:<0.035%,Cu:<0.40%,Ni<0 ... , high security, highly pressurized, widely usedMin order3 tons 1/4''-24'' carbon steel pipe