1). Outer diameter: 219-1620mm 2). Wall thickness: sch5, sch10, sch20, sch40, sch80, sch160, schxx4 3). Standard: api5ct, api5l, gb/t13793-1992 4). Packing: as per customerf+s requests Application: crude oil, pipelines, natural gas pipelines, water supply lines, foundation piles, industrial pipeline networks, steel constructors, etc. Painting black, cap, in bundle.