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广泛应用于建筑工程的水煤气管道系统,经过几代更新,从生产到应用技术已经成熟。管道系统第一代为黑钢管,第二代为镀锌钢管,第三代为铜或塑料管,第四代即为铝塑复合管。铝塑复合管是80年代欧美等工业发达国家相继研制开发的一种新型管材,它集金属与塑料的优点于一体,克服了以往许多管材的缺点,在很多领域可取代金属管并优于
The water gas pipeline system, which is widely used in construction projects, has been updated over several generations and has matured from production to application technology. The first generation of the pipeline system is a black steel pipe, the second generation is a galvanized steel pipe, the third generation is a copper or plastic pipe, and the fourth generation is an aluminum-plastic composite pipe. Aluminum-plastic composite pipe is a new type of pipe developed successively in Europe and America and other industrialized countries in the 1980s. It combines the advantages of metal and plastic. It overcomes the shortcomings of many pipes in the past and can replace metal pipes in many fields and is superior to