PE pipes are currently in China's municipal pipe market. Plastic pipes are developing steadily. PE pipes, PP-R pipes and UPVC pipes all occupy a place. Among them, the strong development momentum of PE pipes is the most eye-catching. PE pipes are used in a wide range of fields. Among them, water supply pipes and gas pipes are its two largest application markets. PE resin is polymerized by monomer ethylene. Due to different polymerization conditions such as pressure and temperature during polymerization, resins of different densities can be obtained. Therefore, there are high-density polyethylene, medium-density polyethylene and low-density polyethylene. The point of ethylene. When processing different types of PE pipes, according to the different application conditions, select the corresponding resin grades, and the requirements for the extruder and mold are also different.
■ Good hygiene performance: no heavy metal salt stabilizer is added during PE pipe processing, the material is non-toxic, no scaling layer, no bacteria breeding, and it solves the secondary pollution of urban drinking water.
■Good corrosion resistance: Except for a few strong oxidants, it can withstand the erosion of a variety of chemical media; no electrochemical corrosion.
■ Long service life: PE pipes can be used safely for more than 50 years under rated temperature and pressure conditions.
■ Good impact resistance: PE pipe has good toughness and high impact resistance, and heavy objects directly press through the pipe, which will not cause the pipe to rupture.
■ Reliable connection performance: The strength of the PE pipe hot-melt or electric-melt interface is higher than that of the pipe body, and the joint will not be disconnected due to soil movement or live load.
■ Good construction performance: the pipeline is light in weight, the welding process is simple, the construction is convenient, and the overall project cost is low.
Pipe connection:
■ Electrothermal welding: use a special electric welding machine to connect the straight pipe and the straight pipe, and the straight pipe and the pipe fittings. Generally used for tubes below 160mm.
■ Hot melt butt connection: use dedicated butt welder pipes to connect, generally used for pipes above 160mm.
■ Steel-plastic connection: It can be connected by flanges, threaded threads and other methods.
■ To facilitate construction and ensure construction quality, corresponding tools should be prepared.
