HDPE pipe is a pipe made of high-density polyethylene (English name "High Density Polyethylene", abbreviated as "HDPE").
HDPE pipe is a replacement product of traditional steel pipes and PVC drinking water pipes.
HDPE pipes must bear a certain pressure. PE resins with high molecular weight and good mechanical properties are usually used, such as HDPE resins.
High-density polyethylene (HDPE) pipes are ideal for many applications such as oil and gas collection, drinking water, wastewater, mining and industrial systems, power and communications, and natural gas distribution. HDPE piping is resistant to chemicals, corrosion, physical damage, etc. to provide a long-term, cost-effective piping system.
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HDPE Pipe Characteristics
HDPE is a good pipeline. It should not only have good economy, but also have a series of advantages such as stable and reliable interface, anti-impact, anti-cracking, anti-aging, and corrosion resistance. Compared with traditional pipes, HDPE piping system has The following series of advantages:
⑴Reliable connection: The polyethylene pipe system is connected by electric heat melting, and the strength of the joint is higher than the strength of the pipe body.
⑵Good low-temperature impact resistance: The low-temperature embrittlement temperature of polyethylene is extremely low, and it can be used safely in the temperature range of -60-60℃. During construction in winter, because the material has good impact resistance, the pipe will not be brittle.
⑶ Good stress crack resistance: HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, and its environmental stress crack resistance is also very outstanding.
⑷Good chemical corrosion resistance: HDPE pipelines can withstand the corrosion of a variety of chemical media, and the chemical substances in the soil will not cause any degradation to the pipeline. Polyethylene is an electrical insulator, so it will not rot, rust or electrochemical corrosion; in addition, it will not promote the growth of algae, bacteria or fungi.
⑸Aging resistance and long service life: Polyethylene pipes containing 2-2.5% evenly distributed carbon black can be stored or used outdoors for 50 years without being damaged by ultraviolet radiation.
⑹ Good abrasion resistance: The comparison test of the abrasion resistance of HDPE pipes and steel pipes shows that the abrasion resistance of HDPE pipes is 4 times that of steel pipes. In the field of mud transportation, HDPE pipes have better wear resistance than steel pipes, which means that HDPE pipes have a longer service life and better economy.
⑺Good flexibility: The flexibility of HDPE pipe makes it easy to bend. In engineering, obstacles can be bypassed by changing the direction of the pipeline. In many cases, the flexibility of the pipeline can reduce the amount of pipe fittings and reduce installation costs.
⑻Small water flow resistance: HDPE pipe has a smooth inner surface, and its Manning coefficient is 0.009. The smooth performance and non-adhesive properties ensure that HDPE pipes have a higher conveying capacity than traditional pipes, and at the same time reduce the pressure loss of the pipes and the energy consumption of water transmission.
⑼Convenient handling: HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes. It is easy to handle and install. Lower manpower and equipment requirements mean that the installation cost of the project is greatly reduced.
⑽Various new construction methods: HDPE pipe has a variety of construction technologies. In addition to traditional excavation methods, it can also use a variety of new non-excavation technologies such as pipe jacking, directional drilling, liner, It is a good choice for some places where excavation is not allowed.
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