HDPE Pipe High-Density Polyethylene Pipe for Durable Water Supply

1. Basic information

Chemical name: High Density Polyethylene

abbreviation: HDPE

CAS Number: 9002-88-4

Molecular formula: (C₂H₄)ₙ

2. Physical characteristics

Density: 0.941-0.965 g/cm³

Melting point: 120-140°C

Tensile strength: 20-37 MPa

Fracture elongation: 10-1200%

Hardness: Shore D 60-70

Hot deformation temperature: 60-90°C (0.45 MPa)

3. Chemical characteristics

Chemical resistance: acid, alkali, alcohol, grease, etc., not resistant to strong oxidants and some organic solvents

Weather resistance: Good, but long-term exposure to ultraviolet radiation can cause aging

Water resistance: excellent, almost non absorbent

4. Processing method
Injection molding: used for manufacturing containers, lids, etc

Features

Strong corrosion resistance: HDPE pipes have excellent tolerance to most chemicals, including acids, alkalis, salts, etc. In the water supply system, it can effectively resist the erosion of various chemicals in the water, will not rust or be corroded, can maintain the integrity and water delivery capacity of the pipe for a long time, greatly extend the service life of the pipe, and reduce the frequency of maintenance and replacement.

Good wear resistance: It has high density and hardness, smooth surface, and low friction coefficient with water. This makes the water flow in the pipe with low resistance and low energy consumption, and also reduces the wear of the pipe wall by particles in the water. It is suitable for conveying water sources containing certain impurities, ensuring that the water delivery efficiency of the pipeline will not decrease significantly during long-term use.

Good flexibility: HDPE pipe has good flexibility and can bend to a certain extent without breaking. This feature allows it to adapt to various complex terrain conditions during the laying process, such as bypassing obstacles and crossing narrow spaces, reducing the difficulty and cost of construction. At the same time, when geological disasters such as earthquakes occur, it can also absorb part of the energy through its own deformation, reduce the risk of pipeline rupture, and improve the safety and reliability of the water supply system.

Convenient and reliable connection: Common connection methods include hot melt connection and electric fusion connection. Hot melt connection is to heat the connection part of the pipe and the pipe fitting to a molten state, then quickly connect and apply a certain pressure to make the two melt into one; electric fusion connection is to heat the resistance wire inside the electric fusion pipe fitting to melt and combine the connection part of the pipe fitting and the pipe. Both connection methods can form a firm and sealed connection, effectively preventing the occurrence of water leakage.

Hygienic and non-toxic: HDPE is a non-toxic polymer material that will not pollute the water quality. It meets the national drinking water hygiene standards and can be safely used for the transportation of drinking water, ensuring the safety and health of residents' water use.

Anti-ultraviolet performance: By adding appropriate anti-ultraviolet stabilizers, HDPE pipes can resist ultraviolet radiation to a certain extent and delay the aging process of the pipe. Even if laid in the open air or in direct sunlight, it can maintain good performance for a long time and is suitable for some special water supply projects.

Application

Municipal water supply system: It is an ideal choice for municipal water supply pipelines, which can be used for urban trunk water supply pipelines, community water supply branches, etc. It can meet the needs of large-scale, long-term stable water supply and ensure the daily water supply of urban residents.

Rural safe drinking water project: In rural areas, HDPE pipes are widely used in rural safe drinking water projects due to their corrosion resistance, flexibility and low cost. It can deliver clean water to farmers' homes and improve the drinking water conditions of rural residents.

Industrial water supply: In industrial production, many factories require a large amount of clean water. HDPE pipes can be used for cooling water circulation systems and process water delivery in industrial production. Its corrosion resistance and wear resistance can adapt to various chemicals and impurities that may be contained in industrial water to ensure the normal progress of industrial production.

Garden irrigation: In garden, green space and farmland irrigation systems, the flexibility and corrosion resistance of HDPE pipes enable them to be easily laid in different terrains and environments. It can evenly deliver water to various irrigation points, improve irrigation efficiency, and reduce the waste of water resources caused by pipeline corrosion and breakage.

Precautions

Storage and transportation: HDPE pipes should be stored in a well-ventilated and dry warehouse to avoid direct sunlight and exposure. During transportation, the pipes should be prevented from collision, extrusion and scratches to avoid affecting the performance and service life of the pipes.

Construction and installation: Before construction, the quality of pipes and fittings should be carefully checked to ensure that there are no damage and defects.

When connecting, the operation procedures should be strictly followed, and the parameters such as heating temperature, time and pressure should be controlled to ensure the quality of the connection. When laying the pipeline, pay attention to the treatment of the foundation to avoid damage to the pipeline due to uneven settlement of the foundation.

Temperature limit: The operating temperature of HDPE pipes is generally between - 20℃ and 60℃. When constructing in a low temperature environment, appropriate insulation measures should be taken to prevent the pipes from being brittle; when used in a high temperature environment, care should be taken to avoid the pipes from being subjected to excessive pressure for a long time to avoid affecting the performance of the pipes.

Compatibility with other materials: When connecting with other materials (such as valves, water meters, etc.), pay attention to choosing appropriate connection methods and accessories to ensure the sealing and reliability of the connection. At the same time, avoid contact between HDPE pipes and some substances that may cause chemical corrosion to them.

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