... Pipe Product NameBrief IntroductionMaterialModel NumberBrand NameMinimum Order QuantityUnitAdditional Description 4 1/2" oil casingCasing and Tubing Standard: API 5CT, ... ,T1a,T1bASTM A519 Gr. 1020,1030,1045,1513,1524,4130,4135,4142DIN17204 Gr. C22,Ck22,Cm22,C35,Ck35,C45,Ck45EN10208 ... for petroleum 20, 12 CrMo,15 CrMoGB9948-8810-530*1.5-36Boiler pipes for refinery,heatexchangeing pipes,seamless steel ...