... .Good abrasion resistance 3.Widely used in the drainage of railway,highway ,tunnel HDPE double-wall corrugated pipe using HDPE ... abrasion resistance 4.longevityApplication Field :Widely used in the drainage of railway ,highway ,tunnel , waste landfill, green belts ,sports ground ... at 40%,unloading immediately, it no crack, no separation of layersHammer falling impact testIt should be no cracks, under ...