HDPE (high-density polyethylene) pipes have become an ideal substitute for traditional metal pipes in the field of gas transportation due to their excellent performance and safety. The following are the main advantages of HDPE gas pipes and related safety standards:
1. Excellent corrosion resistance
HDPE is an inert material that can withstand corrosion from a variety of chemical media, including natural gas, liquefied petroleum gas (LPG) and liquid hydrocarbons in manufactured coal gas, and will not undergo electrochemical corrosion or rust.
2. High toughness and impact resistance
The low-temperature embrittlement temperature is as low as -60°C, and it can be used safely in extreme climates. It has strong seismic resistance and adapts to uneven foundation settlement.
3. Reliable connection method
Adopting hot-melt butt or electric fusion connection, the joint strength is higher than the pipe body itself, eliminating the risk of leakage.
4. Long life and aging resistance
Contains 2-2.5% carbon black, is resistant to ultraviolet radiation, and has a service life of more than 50 years.
5. Convenient and economical construction
Light weight, can be transported in coils, supports trenchless technology (such as jacking, directional drilling), and reduces installation costs.
6. Wear resistance and low flow resistance
The wear resistance is 4 times that of steel pipes, the inner wall is smooth (Manning coefficient 0.009), and the energy consumption of gas transmission is reduced.
7. Environmental protection and safety
The material is non-toxic, recyclable, and meets green environmental protection requirements.
1. International and national standards
GB 15558.1-2015: China's gas pipe standard, covering PE80 and PE100 materials, and specifies series such as SDR11 (0.4MPa) and SDR17.6 (0.2MPa).
ISO 4437: International standard that specifies the chemical resistance and long-term performance of PE pipes in gas transportation.
2. Color identification
The pipe is usually black with yellow stripes to ensure eye-catching identification.
3. Construction specifications
Specialized hot melt/electric melt equipment must be used to ensure that the interface is defect-free; a sand layer must be laid to protect the pipeline during backfilling.
4. Pressure level
SDR11 is suitable for gas containing liquid hydrocarbons (such as LPG), and SDR17.6 is suitable for low-pressure natural gas.
5. Quality control
Production must pass ISO9001 certification, and some companies use high-quality raw materials such as Borealis to ensure resistance to slow crack growth (SCG) and rapid crack propagation (RCP).
HDPE gas pipes are widely used in:
Natural gas transmission and distribution
Liquefied petroleum gas (LPG) transmission
Artificial gas pipelines
Industrial gas supply.
HDPE pipes are gradually replacing traditional steel pipes and cast iron pipes with their corrosion resistance, high safety and long life, becoming the preferred material for modern gas transmission systems.
Official website: www.phtopindustry.com | www.phpipes.com
Contact us: Email:inquiry@phtopindustry.com | Whatsapp:+86 15093100892
Company address: Room 802, 8th Floor, Building 5, Jinyin Modern City, Jinshui District, Zhengzhou City, Henan Province, China
HDPE pipes (high-density polyethylene pipes) are widely used in the field of gas transportation. Due to their superior performance and high safety, they have gradually replaced traditional metal pipes. The following is a detailed description of the advantages and safety standards.
1. Excellent corrosion resistance
HDPE pipes have strong corrosion resistance to chemicals such as acids, alkalis, and salts. They are particularly suitable for buried gas pipeline systems, avoiding the risk of metal pipelines being easily rusted and leaked, and extending their service life.
2. Good flexibility and seismic resistance
HDPE pipes have good flexibility and impact resistance, can adapt to geological movements such as ground subsidence and earthquakes, reduce the probability of pipeline breakage and loose interfaces, and ensure the continuity and safety of gas transportation.
3. Reliable connection and no leakage
HDPE gas pipes mostly use hot-melt butt or electric fusion connection technology. The welding part is integrated with the parent material, and the connection strength is higher than the pipe body, ensuring that the pipeline system is leak-free and significantly improving the operation safety.
4. Lightweight and easy to construct
Compared with traditional metal pipes, HDPE pipes are lighter, easier to transport and lay, and can be supplied in coil form, which reduces the number of interfaces, shortens the construction period, and reduces engineering costs.
5. Excellent aging resistance and service life
HDPE gas pipes are added with anti-ultraviolet and anti-aging additives, and have a service life of more than 50 years (under normal temperature and pressure conditions), greatly reducing the frequency and cost of subsequent maintenance.
6. Good fluid transportation performance
The inner wall of HDPE pipes is smooth, with low friction resistance and a larger flow rate under the same caliber, saving energy transportation costs and improving gas transportation efficiency.
1. ISO 4437 standard
Internationally, HDPE gas pipelines mainly follow the ISO 4437 standard, which regulates the materials, performance, test methods and use requirements of polyethylene (PE) pipeline systems for gas transportation, ensuring the safety and reliability of the pipelines.
2. China National Standard GB 15558
In China, HDPE gas pipelines implement "GB 15558.1-2015 Buried Polyethylene (PE) Pipeline System for Gas Part 1: Pipes", which strictly stipulates the raw materials (PE80, PE100), pipeline pressure levels, dimensions, tolerances, and physical properties (resistance to hydrostatic pressure, resistance to slow crack growth, resistance to rapid crack expansion, etc.).
3. ASTM D2513 (American standard)
American HDPE pipes for gas follow the ASTM D2513 standard, covering the classification of pipes, material requirements, physical properties, connection methods and pressure testing, ensuring the safe application of pipelines.
4. Safe operation specifications
Construction standards: HDPE gas pipe construction must follow standardized operations, such as the "Gas Pipeline Engineering Construction and Acceptance Specifications" (GB 50251-2015), to ensure welding quality, laying depth, and protective measures are in place.
Inspection and acceptance: including pressure testing, welding quality testing, flaw detection, etc., to ensure that there is no leakage and no defects before it can be put into use.
Regular inspection and maintenance: According to the gas company and industry specifications, regular pipeline inspections, inspections, and preventive maintenance are carried out to ensure long-term safe operation.
HDPE pipe has become the preferred material for gas transportation with its excellent corrosion resistance, flexibility, leak-free connection method and long life. At the same time, perfect international and domestic safety standards provide a strong guarantee for the safe operation of HDPE gas pipelines. With the continuous development of urban gas pipeline networks, HDPE pipes will play a more important role in the field of gas transportation.
Official website: www.phtopindustry.com | www.phpipes.com
Contact us: Email:inquiry@phtopindustry.com | Whatsapp:+86 15093100892
Company address: Room 802, 8th Floor, Building 5, Jinyin Modern City, Jinshui District, Zhengzhou City, Henan Province, China