... fittings.Advantage:High mechanical strength,anti-corrosion, rust-proof, no fouling, smooth wall,clean non-toxic ... 13665394058 Composition: Steel pipe, inner and outer PE coating (or EP coating) Usage: Fire and water ... building. Excellent anti-erosion: coating material is PE or EP Can be used for 70 years. ... liquid run quickly and largely Environment friendly, complied with GB/T17219-1998 (API, ASTM, JIS, ...