PE is polyethylene plastic, the most basic plastic. Plastic bags, plastic wrap, etc. are all PE. HDPE is a highly crystalline, non-polar thermoplastic resin. The appearance of original HDPE is milky white, and it is translucent to a certain extent in thin sections. PE has excellent resistance to most domestic and industrial chemicals. Welding of PE pipes, PE pipe butt welds, this method provides the highest reliability and within a range of diameters and pressures Process: Heating the end of the pipe, using a tool called a "mirror" under the definition of pressure and temperature ". The ends are contacted quickly and kept under pressure during the cooling process. PE pipes include medium density polyethylene pipes and high density polyethylene pipes. According to the wall thickness, it is divided into SDR11 and SDR17.6 series. The former is suitable for transporting gaseous artificial coal gas, natural gas, and liquefied petroleum gas, while the latter is mainly used for transporting natural gas. Compared with steel pipes, the construction process is simple and has a certain degree of flexibility. More importantly, it does not need to be used for anti-corrosion treatment, which will save a lot of processes. The disadvantage is that the mechanical properties are not as good as those of steel pipes. During construction, special attention should be paid to the safety distance of thermal heating, and they cannot be exposed to the air and sunlight. They are also sensitive to chemicals to prevent damage from leakage of sewage pipes. PE is polyethylene plastic, the most basic plastic. Plastic bags, plastic wrap, etc. are all PE. HDPE is a highly crystalline, non-polar thermoplastic resin. The appearance of original HDPE is milky white, and it is translucent to a certain extent in thin sections. PE has excellent resistance to most domestic and industrial chemicals. [1] Welding of PE pipes, PE pipe butt welds: This is a method that provides the highest reliability and range of diameters and pressure processes: Heating the end of the pipe, using a tool called a contact "Mirror image" under the definition of pressure and temperature. The ends are contacted quickly and kept under pressure during the cooling process.