Polyethylene, abbreviated as PE in English, is a thermoplastic resin produced by the polymerization of ethylene monomers. PE pipes for gas distribution represent a replacement for traditional steel and polyvinyl chloride (PVC) gas pipes. PE resin is synthesized through the polymerization of ethylene monomers. Depending on the polymerization conditions—such as pressure and temperature—the density of the resulting resin varies, leading to distinctions among high-density polyethylene, medium-density polyethylene, and low-density polyethylene. When processing different types of PE pipes, it is essential to select the appropriate resin grade based on the specific application conditions. Moreover, the requirements for extruders and molds also differ accordingly. In the plastic pipe industry: PE pipe 、 PP-R pipe 、 UPVC pipe All have their own place; in contrast, PE pipes are used in a wider range of applications, among which... PE water supply pipe and PE gas pipe These are its two largest application markets.

Next, let me briefly explain the main differences between HDPE pipes and PE pipes: HDPE stands for high-density polyethylene. Compared to conventional PE pipes, HDPE is a highly crystalline, non-polar thermoplastic resin. In its raw state, HDPE has a milky-white appearance and exhibits a certain degree of transparency in thin cross-sections. HDPE pipes boast superior performance and are also used in a wider range of applications.
        

• HDPE pipes must be able to withstand a certain level of pressure; therefore, PE resins with high molecular weights and excellent mechanical properties—such as HDPE resin—are typically selected. The strength of HDPE resin is nine times that of ordinary polyethylene.

• Among all engineering plastic materials, HDPE boasts the highest wear resistance among plastics. The higher the molecular weight, the more wear-resistant the material becomes—so much so that it even surpasses many metallic materials (such as carbon steel, stainless steel, and bronze). Under normal circumstances, conventional low-density polyethylene does not possess this characteristic.

• HDPE pipes are a replacement for traditional steel pipes and polyvinyl chloride potable water pipes.

• In addition, HDPE pipes are primarily used for: municipal water supply systems, indoor water supply systems in buildings, underground outdoor water supply systems, underground water supply systems in residential communities and industrial parks, rehabilitation of existing pipelines, pipeline systems for water treatment projects, as well as industrial water pipes for landscaping, irrigation, and other applications.

• Medium-density polyethylene pipes are suitable only for conveying gaseous synthetic gas, natural gas, and liquefied petroleum gas.

• Low-density polyethylene pipes are of the hose type;

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