... X56, X60, X65, X70, St37,ST52Transmission of the petroleum, natural gas and waterCylinder PipeGB1824834Mn2V, 37Mn, 30CrMo, 34CrMo4Raw material for producing ... GB3087, GB5310A, B, V, T11, T12, T22, T91, St35.8, St45.8, 20#, 20G, 20MnG, 20MoG, 15CrMoG, 12Cr1MoVGLow & medium & high ... dimensional and wall thickness specifications in sizes from 1/8'' to 36'' OD. Models of steel pipesTensile strengthMPaYield ...