the HDPE Large Diameter Winding Pipe Extrusion Line base on high density polythene (PE) as main material. The rectangle pipes are extruded by the first extruder and then enter into the twine form machine, at the same time, the second extruder spray the rubber strips and then squeeze to reunite it, Its outside wall is neat and smooth. Specification is 400-2200mm. According to different usage term, the hardness degree of ring is divided into four grades and the Max can reach 16KN/m2. It is suitable for the sour alkali liquid below 10%. This kind of pipe has many extremely excellent characteristics, such as, corrosion resistant light, easy installation, long working life (50years), etc. It can substitute the pipes made of high energy consumption material (cement, cast iron, porcelain and ceramics, etc. It is widely used for sewer in superhighway, municipal construction, flats, athletic field, square, mine agriculture, and bridges etc |