الخصائص الفيزيائية

Flexibility: The bending radius can be ≥25 times the pipe diameter, adapting to foundation settlement or terrain undulations and reducing the number of joints.

Lightweight: The density is about 0.94-0.96g/cm³, and the weight is only 1/8 of that of a steel pipe, with low transportation and installation costs.

الخواص الكيميائية

Corrosion resistance: Resistant to acid, alkali, salt solution (pH4-10), and soil corrosion, no additional anti-corrosion treatment is required, and the service life is more than 50 years.

Low permeability: The molecular structure is dense, and the water vapor permeability is less than 0.01g/(m・d), which prevents leakage of media or infiltration of external pollutants.

الخواص الميكانيكية

High strength: PE100 grade tensile strength ≥26MPa, strong resistance to internal pressure (such as SDR11 pipe pressure resistance 1.0MPa), excellent external pressure impact resistance (-40℃ drop hammer impact pass rate ≥90%).

Thermal Properties

Temperature range: -40℃ to +60℃ for long-term use, +70℃ for short-term use, suitable for temperate to cold climates.

Hot melt: The interface can be integrated through hot melt butt welding and electric fusion connection. The strength is higher than the pipe body and the sealing is reliable.

3 HDPE pipe is widely used in many fields due to its excellent performance:

Water supply network:
Replace cast iron pipes to transport domestic water

Chemical industry:
Transport acid and alkali solutions, industrial wastewater; Food industry: transport pure water, beverage raw materials, meet hygiene requirements.

غلاف حماية الكابل:
Protect power and communication cables when laid underground, resist soil stress and insect gnawing.

1. Hot-melt connection: suitable for straight pipe connection, special hot-melt machine is required, heating temperature is 210±10℃, cooling time is ≥30 minutes, and interface strength reaches more than 90% of the pipe bod
2. Electric fusion connection: suitable for pipe fittings (such as tees and elbows), the pre-buried resistance wire is heated and fused by the electric fusion machine, and the voltage (such as 220V) and heating time (about 90-120 seconds) must be strictly controlled.
3. Flange connection: used when connecting with metal pipes or equipment, HDPE flange root and rubber sealing ring are required, and the bolt torque is uniform to prevent leakage.
4. Construction precautions: When buried underground, the covering depth should be ≥0.7m (≥1.2m for anti-freezing in cold areas), and avoid contact with sharp stones; for hot-melt connections, ensure that the interface is clean to prevent impurities from affecting the strength.