The difference between HDPE pipe and ordinary PE pipe

April 27, 2023

HDPE pipe and PE pipe must bear a certain pressure

Usually, PE resins with large molecular weight and good mechanical properties should be selected, such as HDPE resins. The strength is 9 times that of ordinary polyethylene pipe (PE pipe); Among all engineering plastics, HDPE has the highest wear resistance of plastics. The higher the molecular weight, the more wear-resistant the material is, even more than many metal materials (such as carbon steel, stainless steel, bronze, etc.), ordinary PE does not have this feature; HDPE pipes are replacement products of traditional steel pipes and PVC drinking water pipes. Ordinary PE pipes will not work.

HDPE pipe and PE pipe are mainly used in

municipal engineering water supply systems, building indoor water supply systems, outdoor buried water supply systems, residential quarters, factory buried water supply systems, old pipeline repairs, water treatment engineering piping systems, gardens, irrigation and other fields industrial water pipes, etc. Medium-density polyethylene pipes are only suitable for transporting gaseous artificial gas, natural gas, and liquefied petroleum gas. LDPE pipe is the hose.

[HDPE pipe and PE pipe ] High-density polyethylene pipe

the material is "HDPE", the abbreviation of "High Density Polyethylene". HDPE is a highly crystalline, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. [PE pipe] is a polyethylene plastic pipe. PE is a basic plastic with excellent resistance to most domestic and industrial chemicals. PE pipes can be divided into low-density polyethylene pipes, medium-density polyethylene pipes and high-density polyethylene pipes. HDPE is a highly crystalline, non-polar thermoplastic resin,High-density polyethylene is non-toxic, tasteless and odorless white particles with a melting point of about 130°C and a relative density of 0.941~0.960. It has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, and good mechanical strength. Dielectric properties, environmental stress cracking resistance is also good. The melting temperature is 120~160°C. For materials with larger molecules, the recommended melting temperature range is between 200 and 250 °C. High-density polyethylene is a white powder granular product, non-toxic, tasteless, density in the range of 0.940-0.976 g/cm3; crystallinity of 80%-90%, softening point of 125-135°C, and service temperature up to 100 ℃; Hardness, tensile strength and creep are better than low-density polyethylene; wear resistance, electrical insulation, toughness and cold resistance are better, but slightly worse than low-density insulation; Chemical stability is good, At room temperature, it is insoluble in any organic solvent, resistant to acid, alkali and various salts; the film has low permeability to water vapor and air, and low water absorption; poor aging resistance, environmental cracking resistance is not as good as low-density polyethylene Ethylene, especially thermal oxidation will reduce its performance, so the resin needs to be added with antioxidants and ultraviolet absorbers to improve this deficiency. High-density polyethylene film has a low heat distortion temperature under stress. HDPE pipe and PE pipe HDPE pipe and PE pipe


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