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安装前检验管槽是否达到安装要求。然后查看管材外观有无明显凹陷、裂痕、擦伤、划伤、发现质量隐患及时更换。在管道弯头、三通、渐缩接头、消防栓等处均用C20混砼设置砼支墩,法兰阀门用砖砌支墩加固,PE给水管与金属管道、阀门、消防栓连接时,必须采用钢塑过渡接头或专门的法兰接头。在管道隆起部位或上坡地均应设置排气伐,以减少气、水混压对管道的冲击。管道安装敷设完毕,待隐蔽工程验收后,应立即回填。回填必须从管道两侧同时回填,回填一层夯实一层。管道试压前,一般情况下回填不宜少于500MM,管道试压后的大面积回填,宜在管道内充满水的情况下进行,管道敷设后不宜长时间处于空管状态。
Before installation, check whether the pipe slot meets the installation requirements. Then check whether the appearance of the pipe has obvious dents, cracks, scratches, scratches, and find the quality risks in time and replace them. In the pipe elbows, tees, taper joints, fire hydrants, etc., C20 concrete mixing piers are used to set up the piers. The flange valves are reinforced with brick support piers, and the PE water supply pipes are connected with metal pipes, valves, and fire hydrants. Must use steel plastic transition joints or special flange joints. Exhaust cuts shall be installed at the uplifted areas or uphill areas of the pipeline to reduce the impact of mixed gas and water pressure on the pipeline. After the installation of the pipeline is completed, it shall be backfilled immediately after acceptance of the concealed project. The backfill must be backfilled from both sides of the pipeline at the same time and backfilled with a compact layer. Prior to pipeline pressure test, under normal circumstances, backfilling should not be less than 500 MM. After large-area backfilling after pipeline pressure testing, the pipeline should be filled with water. It is not advisable to leave the pipeline for a long time after the pipeline is laid.