PE pipe is made of polyethylene as the main raw material, adding antioxidant, carbon black and coloring materials. It is characterized by low density, high specific strength, low temperature resistance and toughness, and an embrittlement temperature of -80 °C.
PE pipe plastic can be processed by various methods to make various products such as film, sheet, pipe, profile, etc.; and it is easy to cut, bond and "weld". The plastic is easy to color and can be made into a variety of bright colors. It can also be processed by printing, electroplating, printing and embossing, so that the plastic has a rich decorative effect.
Most plastics are more resistant to acids, alkalis, salts, etc. than metal materials and some inorganic materials. They are especially suitable for doors, windows, floors, walls, etc. in chemical plants; thermoplastics can be dissolved by certain organic solvents, and thermosetting plastics are used. Can not be dissolved, only a certain amount of swelling may occur. Plastics also have good resistance to environmental water and have low water absorption. They can be widely used in waterproof and moisture-proof projects.
The heat resistance of PE pipe plastics is generally not high. When subjected to load at high temperatures, it tends to soften and deform, and even decompose and deteriorate. The ordinary thermoplastics have a heat distortion temperature of 60-120 ° C, and only a small number of varieties can be used at around 200 ° C for a long time. . Some plastics are prone to fire or slow burning, and a large amount of toxic fumes are generated when burned, causing casualties in the event of a fire in a building. The linear expansion coefficient of plastics is larger, 3-10 times larger than metal. Therefore, the temperature deformation is large, and the material is easily broken due to the accumulation of thermal stress.
Because of its excellent low temperature performance and toughness, it can resist the damage of vehicle and mechanical vibration, freezing and thawing, and sudden changes in pressure. Therefore, coils can be used for insertion or plowing construction, which is convenient for construction and low engineering cost; The wall is smooth, the medium flow resistance is small, the energy consumption of the transport medium is low, and it is not subject to the chemical corrosion of liquid hydrocarbons in the transport medium. Medium and high density PE pipes are suitable for urban gas and natural gas pipelines. Low-density PE pipes are suitable for use as drinking water pipes, cable ducts, agricultural sprinkler pipes, pumping station pipes, etc. PE pipes can also be used in the water supply, drain pipes and ducts of the mining industry.