塑料管道连接方式及连接件朱之南，刘英群发达国家在五十年代．就开始使用塑料管代替钢管、尤其在化工工程、煤气天然气，城建部门中广泛使用。因为塑料管具有众多的优点、如耐压性和气密性良好、抗腐蚀能力强．在施工中接口少、工程量小、施工方便等．因而工程造价较钢管... Plastic pipe connections and connections Zhu Zhinan, Liu Yingqun developed countries in the fifties. Began to use plastic pipe instead of steel pipe, especially in chemical engineering, gas natural gas, urban construction sector widely used. Because plastic pipe has many advantages, such as pressure and air tightness, corrosion resistance. Less interface in the construction, the project is small, convenient construction and so on. Thus the project cost more than steel ...