我单位施工的一项电渗析水处理工程,其管路为硬聚氯乙烯管,管路连接为法兰和焊接两种方式。作水压试验时,压力只升到0.2MPa 便发现管接头处漏水。法兰接头漏水是因法兰连接螺栓过少,致使法兰盘连接强度不足,后增加到8个即解决了漏水问题。管焊接接头漏水的原因较多,具体分析如下:1.焊接设备不干净。如风管随处乱放,管中有灰土等污物,焊接时污染焊条及硬塑管,使焊缝处焊接不牢。塑料管本身不干净,管口不加保护,使管 An electrodialysis water treatment project constructed by our company consists of a rigid PVC pipe and flange connection and welding. For the hydrostatic test, the pressure rose only to 0.2 MPa and leakage at the joint was found. Flange joint leakage is due to too few flanged bolts, resulting in insufficient flange connection strength, and then increased to 8 to solve the leakage problem. There are many reasons for leakage of welded joints in pipes. The specific analysis is as follows: 1. The welding equipment is not clean. If the air ducts are thrown everywhere, there are dirt and other dirt in the pipes. Contaminated electrodes and hard plastic pipes during welding make the welding seams not securely welded. The plastic pipe itself is not clean, the nozzle is not protected, so that the pipe