塑料排水排污管道属于非承压管道,一般是埋地铺设。由子管材成型工艺的不同,管壁结构也不尽相同。本文对双壁波纹管、聚乙烯缠绕增强管(克拉管)、中空壁缠绕管、玻璃夹砂管等非承压管道做了初步的介绍,并对各种管道的特点进行了比较。文章从国内外各种塑料管材的应用情况、生产工艺特点、生产设备,以及投资回报等方面进行了分析。 Plastic drainage sewer pipes are non-pressure pipe, usually buried laying. Sub-pipe molding process by the different wall structure is not the same. This paper introduces the non-pressure-bearing pipes such as double-wall corrugated pipe, polyethylene entangled reinforced pipe (carat pipe), hollow-wall winding pipe and glass sand pipe, and compares the characteristics of various pipes. The article analyzes the application of various plastic pipes at home and abroad, the characteristics of production technology, production equipment, and return on investment.