Double wall corrugation pipe machine 1.Max diameter: 800mm 2.Mateial:PE 3.Certificate:CE,ISO 4.Extruder: single screw As a new type of holed material, pre-stress double wall corrugated pipe has many advantages compared with metallic corrugated pipe. It is acid resistant, alkali resistant, it has good sealing property, there is no seepage for water or paste, its rigidity is rather high. Its ...