The outstanding advantages of UPVC pipe are corrosion resistance and non-fouling, which can inhibit the growth of bacteria, improve the water quality of the pipe network, and avoid secondary pollution of pipe network water quality. The government's technical guidelines on the uniformity of UPVC pipes in the relevant rules, construction and engineering quality inspection departments are issued in the form of documents. For the installation and construction of UPVC pipes smaller than DN200, because the interface connection method is more than steel pipes and cast iron pipes, it is necessary to adopt correct and reasonable methods for different interface modes, which is an important aspect to ensure the success of UPVC pipeline engineering. The following points should be noted when installing UPVC. 1. Apron interface (RR interface). Use gauze or cloth to clean the joints, sockets and aprons, so that the joints are clean and free of water and water. After cutting the pipe, the cut end must be chamfered as required. The lubricant is forbidden to be replaced by oil or butter. Generally, the V-type fatty acid salt is used. After the pipe is joined, use a tool such as a feeler gauge to check the apron for misalignment along the interface ring. 2. Glue adhesive interface (TS interface). Wipe the contents of the joint and the outer end of the tube with a cleaning agent. Apply a special glue to the joint and insert it into place once and hold it for a certain period of time. Gluing work cannot be done in rainy days. The glue can not be brushed with a synthetic material, and a natural brush must be used. The tubing, parts and glue are preferably placed at the same temperature for 1 hour before use. 3. Flange connection. In pipeline engineering, UPVC pipes are bound to encounter connections with steel pipes (or cast iron pipes), connections to valves, and so on. At present, many UPVC pipe production plants have proposed various construction methods for flange connection. There are inclined ring flat connection; flat connection; plus pressure ring flange connection. In these methods, it is necessary to pay attention to the difference in thermal expansion coefficient between UPVC and metal pipe fittings. The thermal expansion coefficient of UPVC is much larger, and secondly, it should be considered that it is convenient to disassemble during maintenance. 4. Precautions for the construction of outdoor buried UPVC pipes. The trench trench width is generally required to be not less than 50 cm in width. See also the following: UPVC pipe diameter (MM) 5075100125150200 pipe trench width (CM) 657075758085 pipe trench base to meet the requirements of uniform pipe body force, when trench trenching, generally can design the ditch bottom elevation over 10-15 cm, and then fill As the cushion layer, the bottom of the trench must be leveled according to the design before treatment, and the convex and concave debris and sharp-angled blocks are removed, and the pipeline is backfilled after the pressure test. The sand was backfilled in the chest and the tube about 20 cm, and the cushion was hand-filled with 15 cm of each layer. If the bottom of the ditch is not in the undisturbed soil layer, the silt and soft layer soil should be treated as the foundation, and the soil should be replaced with gravel to make the foundation hard and stable. The laying of UPVC pipes is stricter than that of steel pipes and cast pipes. 5. The UPVC pipe pressure test for the pressure test shall comply with the relevant regulations in the “Construction and Acceptance Procedures for Outdoor Hard Polyethylene Water Supply Pipeline Engineering†(CECS18:90). Its prescribed standard is much higher than the test standard for cast iron pipes. UPVC pipe test pipe section requires strength test and tightness test. The leakage amount is higher than other pipes. 6. The pipeline direction of the UPVC pipe should avoid the urban oil station as far as possible. The oil station will inevitably have gasoline dripping into the soil layer. The UPVC pipe has low resistance to gasoline. If it cannot be avoided, it should take protective measures. Indoor Growing Lights,Pendant Lighting,Motion Lights Indoor,Solar Lamps Indoor Foshan Nanhai Pinming Electrical Appliance Co.,Ltd , https://www.mavcadonf.com