PE pipe (HDPE pipe) is made of polyethylene as the main raw material, adding antioxidants, carbon black and coloring materials. It is characterized by low density, high specific strength, good low temperature resistance and toughness, and the embrittlement temperature can reach -80 °C.
PE pipe plastic can be processed and formed by various methods to make various products such as films, sheets, pipes, profiles, etc.; and it is convenient for cutting, bonding and “welding” processing. Plastic is easy to color and can be made into bright colors; it can also be processed by printing, electroplating, printing and embossing, making plastics rich in decorative effects.
Most plastics have stronger corrosion resistance to acid, alkali, salt, etc. than metal materials and some inorganic materials, and are especially suitable for doors and windows, floors, walls, etc. in chemical plants; thermoplastics can be dissolved by some organic solvents, while thermosetting plastics are It cannot be dissolved, only some swelling may occur. Plastics also have good corrosion resistance to environmental water, low water absorption, and can be widely used in waterproof and moisture-proof projects.
The heat resistance of PE pipe plastics is generally not high. When subjected to loads at high temperatures, it tends to soften and deform, or even decompose and deteriorate. The heat deformation temperature of ordinary thermoplastics is 60-120 °C, and only a few varieties can be used for a long time at around 200 °C. . Some plastics are easy to catch fire or burn slowly, and a large amount of toxic fumes will be produced when burning, causing casualties when buildings catch fire. The coefficient of linear expansion of plastic is larger, which is 3-10 times larger than that of metal. Therefore, the temperature deformation is large, and the material is easily damaged 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, freeze-thaw action and sudden changes in operating pressure. Therefore, coiled pipes can be used for insertion or ploughing construction, which is convenient for construction and low in engineering cost; The pipe wall is smooth, the medium flow resistance is small, the energy consumption of the conveying medium is low, and it is not chemically corroded by the liquid hydrocarbons in the conveying medium. Medium and high density PE pipes are suitable for urban gas and natural gas pipelines. Low-density PE pipes are suitable for drinking water pipes, cable conduits, agricultural spraying pipes, pumping station pipes, etc. PE pipes can also be used in water supply, drainage and air ducts in the mining industry.
Post time: Feb-23-2022
