20# carbon steel pipe 1.Standard:ASTM,AISI,EN,DIN,BS 2 ... :1mm~50mm 4.fast delivery.superior quality About the Products: Descriptioncarbon steel pipe,seamless steel pipe,steel pipe StandardGB5310-95,GB8087-1999,GB8162,GB8163- ... ,CE,APITechniqueHot rolled,cold rolledSurfacePolished,black,bright ApplicationPetroleum and Oil,Chemical Industry, Energy sources, Metallurgy, ContructionPackageIn Bulk Woven ...