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近年来,对聚氯乙烯塑料管在给排水工程中的应用已见多次报导,但对聚乙烯塑料管的推广应用仍不够普遍,究其原因除对该管材性能缺乏足够的认识以外,主要是对接管方法缺少较好的办法。我们在工程实践中,共铺设低密度聚乙烯塑料管588 km,占管道总长度的91％,实践证明聚乙烯管比聚氯乙烯管具有韧性好、运输安装方便、连续长度长,配件少、单位长度比重轻,造价低、安全可靠等优点。与金属管相比除具有以上优点外,还具有施工速度快、粗糙系数(n值)小,耐腐蚀性好等优点。现将我们在使用中的一些情况简介如下。
In recent years, the application of polyvinyl chloride plastic pipes in water supply and drainage projects has been reported several times, but the promotion and application of polyethylene plastic pipes is still not universal. The reason is that in addition to the lack of sufficient understanding of the performance of the pipe, the main It is the lack of a better approach to the takeover method. In our engineering practice, a total of 588 km of low-density polyethylene plastic pipes were laid, accounting for 91% of the total length of the pipeline. Practice has proved that polyethylene pipes have better ductility than PVC pipes, convenient transportation and installation, long continuous length, and fewer accessories. The unit has light weight, low cost, safety and reliability. In addition to the above advantages compared with metal pipes, it also has the advantages of quick construction, low roughness coefficient (n value), and good corrosion resistance. Now we introduce some of the situations in use as follows.