... :seamless pipe for structure,seamless steel pipe for fluid,petroleum casing pipe and oil pipe,steel rolling etc. table1 production cross ... pipe 20,Q3453Billet of the boiler pipe20G,12Cr1MoVG,15CrMoG4Billet of petroleum cracking pipe 20,12CrMo,1Cr5Mo5Billet of the hydraulic prop ... equipment pipe 20,16Mn,12CrMO,12Cr2mo7Billet of the oil casing and tubing 37Mn,34Mn2V,35CrMo8Billet of the gas bottle ...