hollow intertwine pipe production line

We use HDPE as main material, passing first extrusion rectangular pipe to enter into winding form machine, simultaneously the second extruder sprays rubber strip, by extruding and compounding, the pipe is formed. The inner and outer surface of pipe is smooth. Specifications are φ400-φ2200mm. According to different usage condition, the round hardness can be divided into four grades, the max one if 16KN/m2, which can suit acid and alkali liquid under 10%. This kind of pipes have many extremely excellent characteristics, such as, corrosion resistant, light, easy to be fixed, long usage time (50 years),etc. The pipes can be instead of other ones made of high energy consumption materials such as cement, casting iron, ceramic, etc. They can be widely applied in drainage pipelines of high way, housing, playground, square, mine, agriculture, culvert, bridge, etc.