With the acceleration of urbanization and the upgrading of water supply infrastructure, traditional metal and concrete pipes have gradually exposed problems such as easy corrosion, short life and high maintenance cost. HDPE water main has become the mainstream choice of modern water supply system due to its excellent corrosion resistance, flexibility, long life and convenient construction. This article will introduce the characteristics, advantages, applications and future development trends of HDPE water main in detail.
(1) Excellent corrosion resistance
HDPE pipes will not undergo electrochemical corrosion and are not affected by soil pH, microorganisms or chemicals in water. They are suitable for various complex environments and avoid the rust problem of traditional metal pipes.
(2) Excellent flexibility and impact resistance
HDPE pipes have a high elongation at break (>350%) and can adapt to external forces such as foundation settlement and earthquakes, reducing the risk of pipe rupture.
(3) Smooth inner wall and excellent hydraulic performance
HDPE pipes have a low inner wall friction coefficient and are not easy to scale after long-term use. They can maintain a high water delivery efficiency and reduce pumping energy consumption.
(4) Lightweight and high-strength, easy to construct
Compared with cast iron pipes or concrete pipes, HDPE pipes are lightweight, more efficient to transport and install, and can be connected by hot-melt or electric fusion to achieve leak-free sealing.
(5) Ultra-long service life
Under normal use conditions, the life of HDPE water mains can reach more than 50 years, which is much longer than the 20-30 years of traditional metal pipes, and the cost of the entire life cycle is lower.
(1) Economical
Low installation cost: no need for anti-corrosion treatment, fast construction speed, reduced labor and machinery costs.
Low maintenance cost: anti-corrosion, anti-scaling, reduced pipe burst and maintenance frequency.
(2) Environmentally friendly
The material is non-toxic and harmless, and meets the drinking water hygiene standards (compliance with GB/T 17219, FDA and other certifications).
Recyclable, reducing resource waste, in line with the concept of sustainable development.
(3) Strong adaptability
Applicable to various geological conditions, such as soft soil foundations, seismic zones, frozen soil areas, etc.
Non-excavation technology (such as jacking pipe, directional drilling) can be used for laying to reduce interference with urban traffic and the environment.
(1) Municipal water supply main network
HDPE pipes are widely used in urban water supply main networks, with diameters ranging from DN20 to DN2000, and are suitable for long-distance water delivery, river crossing projects and other scenarios.
(2) Water supply for residential and industrial parks
Its light weight and easy installation make it an ideal choice for secondary water supply networks (such as residential communities, commercial areas, and factories).
(3) Water supply for special environments
Earthquake-prone areas: The flexibility of HDPE pipes can effectively absorb seismic waves and reduce the risk of pipeline damage.
Highly corrosive soil areas: Not affected by soil pH, no replacement is required for long-term use.
(4) Temporary water supply system
It is suitable for construction sites, post-disaster emergency water supply and other scenarios, and can be quickly installed and reused.
(1) Connection technology
Hot-melt butt joint: suitable for large-diameter pipes to form a seamless connection.
Electrofusion connection: suitable for small-diameter or complex working conditions to ensure interface strength.
(2) Laying requirements
The bottom of the trench needs to be flat to prevent sharp stones from damaging the pipe.
Use fine sand or soft soil when backfilling to prevent deformation caused by uneven external pressure.
(3) Pressure test
After installation, a water pressure test (1.5 times the working pressure, maintain pressure for 1 hour) is required to ensure no leakage.
(4) Intelligent operation and maintenance
Combined with the Internet of Things (IoT) technology, it can integrate functions such as flow monitoring and leakage alarm to achieve intelligent management.
HDPE water main has become the core pipe material of modern water supply system with its advantages of corrosion resistance, long life, convenient construction, economy and environmental protection. With the advancement of material technology and construction technology, HDPE pipes will play a more important role in municipal water supply, industrial water supply, rural safe drinking water and other fields, providing reliable guarantee for the efficient use of global water resources.
