Polyethylene composite pipe refers to two kinds of polyethylene resins of different densities, which are simultaneously plasticized and melted by two extruders, and then the molten material is simultaneously extruded into a mold capable of forming a composite pipe, and the formed pipe is aggregated. Ethylene composite pipe. The composite pipe can be extruded and compounded by various plastics. The pipe formed by combining high-density polyethylene and low-density polyethylene material has the characteristics of two kinds of raw materials, and its pressure resistance and corrosion resistance are better than ordinary polyethylene pipes. it is good. In industrial and mining enterprises, such composite pipes can be used instead of steel pipes for pipes with corrosive media such as oil and gas, or pipes for mine ventilation.