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HDPE Water Pipe, short for High-Density Polyethylene Water Pipe, is a premium plastic pipe crafted from HDPE resin—a thermoplastic resin with high crystallinity and non-polarity. Its unique molecular structure endows it with exceptional performance, making it a top choice for replacing traditional pipes such as cast iron, steel, and concrete. Engineered through extrusion molding, this pipe offers a perfect blend of durability, flexibility, and efficiency, catering to a wide range of fluid transportation and cable protection needs. It is renowned for its ability to adapt to diverse environments, from municipal water systems to industrial facilities, delivering reliable performance where traditional pipes fall short.
| Parameter category | Parameter name | Typical values/ranges | Explanation |
| Material grade | PE | PE80, PE100, PE100-RC | PE100 grade is currently the mainstream in the market and has a stronger pressure-bearing capacity. PE100-RC has an outstanding ability to resist rapid crack propagation and is suitable for use in harsh geological conditions. |
| Physical and mechanical properties | Density | 0.95 - 0.96 g/cm³ | Measure the density of the material. |
| Melt mass flow rate (MFR) | ≈ 0.1 - 0.5 g/10min (190°C, 5kg) | Reflect the fluidity of the material in its molten state. The lower the value, the higher the molecular weight and the better the crack resistance. | |
| Elastic modulus (20°C) | 800 - 1000 MPa | Measure the material's ability to resist elastic deformation. The modulus of HDPE is much lower than that of metals, demonstrating flexibility. | |
| Tensile yield strength | ≥ 22 MPa (PE100) | The maximum stress that a material can withstand before being pulled apart. | |
| Elongation at break | > 350% | It reflects the toughness and ductility of the material. The higher the value, the less prone it is to brittle fracture. | |
| Long-term performance | Expected design life | 50 years | The designed service life under standard temperature and pressure. |
| Minimum required strength (MRS) | 8.0 MPa (PE80), 10.0 MPa (PE100) | This is the core parameter and serves as the benchmark for the design stress of the pipe material. The higher the MRS, the stronger the pressure-bearing capacity. | |
| Design stress (σ_s) | For example ：PN1.0MPaPipe material，σ_s = 10 MPa | The allowable stress used for calculating the wall thickness. Formula: PN = (2σ_s)/(SDR - 1) | |
| Dimensional system | Nominal outer diameter (dn) | 16mm - 2000mm+ | The nominal value of the outer diameter of the pipe. |
| Standard size ratio | (SDR) SDR11, SDR13.6, SDR17, SDR21, SDR26... | SDR = Nominal outer diameter/Nominal wall thickness. The smaller the SDR value, the thicker the pipe wall and the higher the pressure-bearing capacity. | |
| Nominal pressure (PN) | PN0.6, PN0.8, PN1.0, PN1.25, PN1.6 MPa... | The maximum allowable working pressure of the pipe (at a water temperature of 20°C). | |
| Thermal performance | Vicat softening temperature | ≈ 120 - 130°C | One of the indicators for measuring the heat resistance of materials. |
| Continuous operating temperature | -40°C - +60°C | It can be safely and continuously used within this temperature range and has excellent low-temperature resistance | |
| Coefficient of linear expansion | 0.2 mm/(m·°C) | It is about ten times that of steel pipes. When installing, thermal expansion and contraction should be taken into account, and expansion joints should be set or meandering laying should be adopted. | |
| Chemical and hygiene properties | Chemical resistance | better | Resistant to corrosion by various acids, alkalis and salts, but not resistant to strong oxidizing acids. |
| Hygienic performance | GB/T 17219、NSF/ANSI 61 | Non-toxic and odorless, suitable for drinking water transportation. |
HDPE Water Pipe excels in corrosion resistance, withstanding exposure to acids, alkalis, salts, and various chemical substances. Unlike metal pipes that rust or concrete pipes that degrade, it maintains structural integrity in corrosive soils and when transporting corrosive fluids. This makes it ideal for long-term underground installations and industrial applications where fluid compatibility is critical.
The inherent flexibility of HDPE Water Pipe allows it to adapt to large topographic changes, making it perfect for hilly or uneven terrain. It exhibits exceptional impact resistance, absorbing shocks without cracking or breaking, even in areas prone to earthquakes or ground movement. Its flexible nature eliminates the need for excessive joints, reducing leakage risks and enhancing overall system reliability.
Designed for longevity, HDPE Water Pipe offers an extended service life, outperforming traditional pipe materials. It resists wear, degradation, and fatigue, maintaining consistent performance for decades. This reduces the need for frequent maintenance and replacement, lowering long-term costs and minimizing disruption to infrastructure.
The smooth inner wall of HDPE Water Pipe minimizes friction, allowing for higher flow rates compared to traditional pipes. This means it can deliver more fluid with less energy consumption, making it an efficient choice for water supply and drainage systems. The smooth surface also prevents sediment buildup, reducing clogging and the need for cleaning.
HDPE Water Pipe is significantly lighter than metal or concrete pipes, simplifying transportation and on-site handling. It requires fewer workers and less heavy machinery to install, reducing construction intensity and shortening project timelines. Its lightweight design also lowers transportation costs, making it a cost-effective option for large-scale projects.
The pipe features reliable connection methods that eliminate the leakage risks associated with traditional socket joints. Heat fusion and electrofusion connections create seamless, homogeneous joints that are as strong as the pipe itself, preventing fluid leakage and ensuring system integrity. This reliability is crucial for applications like drinking water supply and gas transmission, where leaks can have serious consequences.
HDPE Water Pipe is a green choice for infrastructure projects. It is non-toxic, odorless, and fully recyclable, aligning with global sustainability goals. Its production process consumes less energy than traditional pipe materials, and its long service life reduces waste from replacements. It is also compliant with international hygiene standards, making it safe for drinking water transportation.
HDPE Water Pipe is versatile enough to serve numerous critical applications. In municipal water supply systems, it is used for urban water main pipes and distribution networks, delivering clean drinking water to homes and businesses. For gas transmission, specially colored HDPE Water Pipe (yellow or black with yellow stripes) is used for medium and low-pressure gas pipe networks. It is a key component in drainage and sewage systems, handling rainwater discharge and sewage transportation efficiently. In agriculture, it serves as main and branch pipes for drip irrigation and sprinkler irrigation systems, ensuring efficient water distribution. Industrial facilities use it to transport chemical fluids, mineral slurries, and food products, while the communication industry relies on it as a sheath for optical fibers and cables, providing protection against damage and interference.
The design of HDPE Water Pipe is optimized for performance, compatibility, and adaptability. It is available in a wide range of nominal outer diameters, catering to small-scale residential projects and large-scale municipal infrastructure. The pipe’s wall thickness is engineered based on application requirements, with standard size ratios that balance pressure-bearing capacity and material efficiency. Its thermoplastic nature allows for flexibility, enabling it to bend slightly without breaking, which is ideal for navigating around obstacles during installation. The material incorporates additives that enhance its low-temperature resistance, allowing safe use in freezing conditions. The pipe’s design prioritizes compatibility with standard connection methods, ensuring seamless integration into existing systems. Hygienic additives are included to meet drinking water standards, making it suitable for potable water applications.
HDPE Water Pipe is suitable for transporting a wide range of fluids, including drinking water, sewage, rainwater, chemical fluids, mineral slurries, and food products. It is corrosion-resistant, making it safe for both neutral and mildly corrosive fluids.
Yes, its excellent flexibility and impact resistance make HDPE Water Pipe perfect for areas with uneven terrain or frequent ground movement. It can bend without cracking, adapting to hills, valleys, and construction sites with complex topography.
