hs code carbon steel pipe OD: 21.3 to 610mm WT: 0.8 -14.27mm standard:API steel grade:X60 Product namehs code carbon ... X70CertificateAPI5LEndPlain end,bevele,etc.SurfaceBare, varnished, black lacquer, Bitumen Coating, zinc coating, anti-corrosion coating, 3PE,FBE,Epoxy, Cement Mortar, as ...