... PN4~PN16 3.Quality raw material HDPE Pipe Performance: 1.Non-toxic, health: PE pipe material non-toxic, tasteless, through the ... materials, can resistance to various chemical media. 3.Noleakage, : PE pipe is connected by electric melting, its interface strength higher than ... tube itself . 4.High toughness: fracture extension rate of PE pipe, commonly more than 500%. .As to the uneven settlement ...