Large diameter HDPE hollow wind pipe production line: HDPE plastic pipe extrusion line, plastic pipe extrusion production line, plastic pipe machinery, plastic pipe equipment, HDPE pipe screw extruder, plastic pipe extrusion machinery Large diameter HDPE hollow wind pipe production line: 1. In the country, drainage pipes almost adopt cements ones. Because its chemical characteristics are not steady, its joint is not tight, is easy to leak and pollutes the environment. 2. It has become a main pollution for citizens of modern cities. The cast pipes has shortcoming of construction fee is high, not easy to be built and others. Now it has been forbidden. 3. In recent years, plastics pipe has taken the place of cement ones. The new large-diameter hollow twisted pipes are paid high attention. It is a renewal product and is widely used in drainage, expressway, exhausting rain the stadium, field irrigating and others.