The composition and advantages of PE pipe

PE is the abbreviation of polyethylene, its chemical structure is simple, it is a high molecular organic compound, which is polymerized by ethylene. According to the different density, PE is divided into high, medium and low density polyethylene. According to the process, polyethylene can be divided into three types: high pressure method, low pressure method and medium pressure method. The high-pressure method is used to produce low-density polyethylene. This method was developed early. The polyethylene produced by this method has so far accounted for about 2/3 of the total polyethylene output. However, with the development of production technology and catalysts, its growth rate has increased. It lags far behind the low-pressure law. The low pressure method includes slurry method, solution method and gas phase method. The slurry method is mainly used to produce high-density polyethylene, while the solution method and gas phase method can not only produce high-density polyethylene, but also produce medium and low-density polyethylene by adding comonomers, which is also called linear low-density polyethylene. Vinyl. In recent years, various low-pressure processes have developed rapidly. The medium-pressure method is still used by Philips only, and it mainly produces high-density polyethylene.

　　 Compared with traditional pipes, PE pipe has the characteristics of good toughness, low density, high strength, good corrosion resistance and insulation performance, and easy construction and installation. Therefore, PE pipes are widely used in various fields such as municipal construction, water supply and drainage engineering, agricultural water-saving irrigation, industrial sewage, heating and heating, wire and cable threading, and mineral transportation. Compared with steel pipes, the cost of PE pipes is lower than can be reduced by 12%, and the working life is longer, up to 5Oa (steel pipes are generally 20a), not only that, its maintenance costs are also lower. However, in our country, the pipe standards and specifications in some fields are not perfect, which has a certain impact on the application and development of PE pipes. On the other hand, as galvanized pipes are gradually being banned, PE pipes have shown their advantages in the fields of building water supply and other fields. PE pipes also present irreplaceable advantages in the fields of gas, industrial water supply and drainage, communications, and agricultural irrigation. However, in developed areas abroad, PE pipes account for up to 60% of the market share of water supply pipes, and more than 90% of buried gas pipes. Not only that, foreign countries have established a very mature PE pipe. Construction specifications.

　　PE pipe has very good advantages: ① Good flexibility. The elongation at break of the PE pipe can reach twice, and it will not break easily. ②The low density and light weight make transportation, construction and installation convenient. The construction time is reduced, and the construction target is completed in a short time. ③Corrosion resistance, not easy to scale, especially suitable for conveying media containing sulfur, calcium, and magnesium ions downhole, which greatly saves the cost of anti-corrosion and descaling, and its service life is much longer than other pipe materials. ④The inner wall of the PE pipe is very smooth and has excellent self-lubricating properties, and its relative roughness is roughly 17% of that of ordinary steel pipes.