HDPE管的使用 Use of HDPE pipe


High-density polyethylene pipes, such as HDPE double-wall corrugated pipes, are generally used in low-pressure water pipelines in reuse projects. From an economic point of view, high-density polyethylene pipes with a nominal diameter of 400mm are generally used in reclamation projects. High-density polyethylene (HDPE) pipe is a new type of pipe with a ring-shaped corrugated outer wall and a smooth inner wall. The production line was introduced from Canada in the early 1980s. High-density polyethylene pipes are divided into HDPE double-wall corrugated pipes, HDPz large-caliber wound reinforced pipes, and HDPE smooth pipes. As a new type of lightweight pipe, high density polyethylene pipe has the characteristics of light weight, resistance to external pressure, good sanitary performance, fast construction and long life. When the nominal outside diameter is below DN400, there is still a certain price advantage compared with ductile iron pipes. The foundation of the high-density polyethylene pipeline adopts a sandstone cushion foundation. For a general soil foundation, the foundation only needs to be laid with a sand cushion layer with a thickness of 0.1m. For soft ground, when the bottom of the trough is below the groundwater level, gravel sand or crushed stone should be laid, with a thickness of 0.15m.

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