... water pipes dn20-1600mm 2.High Corrosion resistance 3.High impact strength 4.BV,ISO certificate HDPE High density Polyethylene Dredging Pipes ISO,BV ... in the seas, lakes and all other water bodies. Our high density PE pipes are fitted with welded stub-ends & steel flanges ... wear-resistance, it is 4-8 times of steel pipe, use longer, Piping material of corrosion resistance is strong, can soak ...