... 2. Pressure rating: PN4~PN16 3.Quality raw material Plumbing tube/pe pipe dn20, HDPE80HDPE Pipe Performance: 1.Non- ... through the strict health monitoring ,it belongs to green building materials, never scaling, which can effectively improve the water quality. ... 2.Corrosion resistance: PE belongs to inert materials, can resistance to various chemical media. 3.Noleakage, : PE ...