High-density polyethylene (HDPE) pipes have become one of the preferred materials for industrial wastewater treatment systems due to their excellent performance. The main advantages include:
Excellent corrosion resistance: Can withstand various acids, alkalis, salts and organic solvents, suitable for treating industrial wastewater with complex components
Excellent impact resistance: Not easy to crack even in low temperature environments
Good flexibility: Can adapt to a certain degree of foundation settlement
Long service life: Design service life can reach more than 50 years
Smooth inner wall: Small friction coefficient, strong conveying capacity and not easy to scale
Reliable connection: Hot-melt connection forms an integral structure without leakage risk
Environmental protection and safety: The material is non-toxic and does not pollute water quality
1. Pipe diameter specifications
The diameter range of commonly used HDPE pipes in industrial wastewater treatment systems:
Small diameter pipes: DN20-DN200 (used for dosing systems, sampling lines, etc.)
Medium diameter pipes: DN250-DN600 (mainstream process pipelines)
Large diameter pipes: DN600-DN2000 (used for plant main pipelines, discharge pipelines, etc.)
Ultra-large diameter: DN2000 and above (special engineering applications)
2. Pressure level
Select pipes of different pressure levels according to the system working pressure:
PN0.6MPa: low pressure system, such as gravity flow pipelines
PN0.8MPa: general pressure system
PN1.0MPa: medium pressure system
PN1.25MPa: higher pressure system
PN1.6MPa: high pressure system, such as pumping pipelines
3. Wall thickness standard
HDPE pipe wall thickness is usually divided into SDR (standard dimension ratio) series:
SDR11: thick wall pipe, strong pressure bearing capacity
SDR17: medium wall thickness, balanced economy and strength
SDR26: thin wall pipe, used in low pressure system
Specific wall thickness can refer to GB/T 13663.2-2018 standard.
4. Material grade
HDPE pipe produced from PE100 grade raw materials is recommended for industrial wastewater treatment, which has higher long-term hydrostatic strength and crack growth resistance.
1. Chemical corrosion resistant pipes
For industrial wastewater containing highly corrosive components, the following should be considered:
Select PE100 RC (stress cracking resistance) material
Increase the wall thickness design margin (reduce the SDR value by one level)
Consider a special anti-corrosion layer for the inner lining (such as PP lining)
2. High-temperature wastewater pipes
When the wastewater temperature exceeds 40°C:
Select high-temperature resistant HDPE material (such as PE-RT)
The pressure level needs to be increased by one level
Consider thermal expansion compensation design
3. Underground buried pipes
Ring stiffness selection: SN8 or above (SN12.5 or above for heavy-load areas)
Consider the outer anti-corrosion layer (such as double-wall corrugated pipe structure)
The relationship between burial depth and load needs to be calculated.
Select the appropriate connection method according to the pipe diameter and engineering requirements:
Hot-melt butt: suitable for DN≥90mm pipes, high connection strength
Electrofusion connection: suitable for various pipe diameters, easy to install
Flange connection: required to connect with metal equipment
Socket connection: commonly used for small-diameter pipes
1. Water quality characteristics analysis: understand wastewater pH value, chemical composition, temperature and other parameters
2. Hydraulic calculation: determine pipe diameter and pressure loss
3. Environmental factors: consider burial conditions, ambient temperature, earthquake level, etc.
4. Standard compliance: ensure that the product complies with standards such as GB/T 13663 and ISO 4427
5. Economic evaluation: balance initial investment and long-term operating costs
Correctly selecting HDPE pipe specifications is crucial to the long-term stable operation of industrial wastewater treatment systems. Engineering designers should select the most suitable HDPE pipe specifications based on specific wastewater characteristics, process requirements and site conditions, combined with relevant standards and specifications, while considering the convenience of installation and maintenance and the full life cycle cost, to provide reliable transportation guarantees for wastewater treatment systems.
Official website: www.phtopindustry.com | www.pefitting.net
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
As global environmental awareness grows, high-density polyethylene (HDPE) pipes have become the top choice for green construction projects due to their recyclability, corrosion resistance, and long service life. As a leading eco-friendly HDPE pipe manufacturer, we offer high-quality, competitively priced wholesale solutions for municipal, industrial, and agricultural applications.
✔ 100% Recyclable Material – Made from virgin PE100/PE80 resin, ensuring zero toxic leaching.
✔ Energy-Efficient Production – Low-carbon manufacturing with minimal waste.
✔ Leak-Free & Durable – 50+ years lifespan, reducing replacement frequency and resource waste.
✔ Chemical & UV Resistant – Ideal for drinking water, wastewater, and gas distribution without contamination risks.
✔ Lightweight & Easy to Install – Lowers transportation emissions and labor costs.
Cost Savings – Eliminate middlemen, enjoy factory-direct prices for bulk orders.
Full Range Available – From DN20 to DN2000, including:
Water Supply Pipes (ISO 4427 certified)
Corrugated Drainage Pipes (for stormwater management)
Gas Pipes (PE100, compliant with EN 1555)
Custom Solutions (UV-stabilized, antimicrobial, etc.)
Fast Global Delivery – Stock ready for urgent projects, with logistics support.
Technical Support – Free guidance on welding, installation, and maintenance.
Municipal Projects – Drinking water networks, sewage systems.
Industrial Use – Chemical transport, mining slurries.
Agriculture – Drip irrigation, aquaculture.
Renewable Energy – Geothermal systems, solar plant piping.
Third-Party Tested – Meets ISO 4427, ASTM F714, EN 12201.
Certifications – NSF, WRAS, CE, and more.
Sustainable Practices – Scrap materials recycled in-house.
Contact us today for a quote!
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Choose our HDPE pipes – Build greener, last longer!
Official website: www.phtopindustry.com | www.pefitting.net
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
The marine environment has high salinity, strong corrosiveness, high pressure and complex fluid dynamics, which places extremely high demands on the durability of pipeline materials. High-density polyethylene (HDPE) pipes have become an ideal choice in marine engineering due to their excellent corrosion resistance, anti-biological adhesion ability, lightweight and flexible design. This article will deeply explore the application, technical advantages and future development trends of HDPE pipes in the marine field.
1. Excellent corrosion resistance
Chloride ions, hydrogen sulfide (H₂S) and microorganisms in seawater are easy to corrode metal pipes, while HDPE is completely unaffected and does not require anti-corrosion coating or cathodic protection.
It is suitable for transporting seawater, salt water, acidic or alkaline media, such as seabed mining, seawater desalination and other scenarios.
2. Anti-biological attachment
Compared with metal and concrete, HDPE has a smooth surface and is not easily attached by marine organisms such as barnacles and algae, reducing maintenance requirements.
It can be combined with antibacterial modified HDPE (such as adding nanosilver) to further inhibit microbial growth.
3. Lightweight and high flexibility
The density is only 1/8 of that of steel, which is convenient for offshore transportation and installation, reducing construction costs.
The flexible design can adapt to changes in seabed topography, has excellent seismic resistance, and reduces the risk of rupture caused by ocean currents or earthquakes.
4. Long life and low maintenance
The service life in the marine environment can reach more than 50 years, far exceeding traditional steel pipes (usually need to be replaced every 15-20 years).
Almost maintenance-free, greatly reducing the total life cycle cost (TCO).
5. Environmentally friendly and safe
Non-toxic, will not pollute the marine ecological environment.
Recyclable, in line with the requirements of sustainable development of the ocean.
1. Seawater transportation system
Seawater desalination plant intake and drainage pipes: corrosion-resistant, suitable for high-pressure seawater transportation in reverse osmosis (RO) systems.
Marine aquaculture water supply pipes: used for deep-water cages and land-based recirculating aquaculture (RAS) systems.
2. Submarine pipeline and cable protection
Submarine water pipes: used for island freshwater supply or domestic water transportation on offshore platforms.
Cable protection sleeves: protect submarine optical fibers and power cables from mechanical damage and corrosion.
3. Marine oil and gas and new energy projects
Oil field injection pipes: transport seawater for oil layer pressurization, replacing carbon steel + anti-corrosion coating solutions.
Offshore wind power pile foundation protection: as an anti-corrosion sleeve, protect steel piles from seawater erosion.
4. Marine environmental protection and dredging projects
Tailing deep-sea discharge pipes: used for the discharge of submarine mining waste, wear-resistant and leak-proof.
Dredge sludge conveying pipes: ultra-high wear-resistant HDPE (such as UHMWPE) is used for mud transportation with high sand content.
5. Floating structures and dock facilities
Floating breakwater connection pipe: flexible connection to adapt to wave movement.
Dock water supply and fire fighting system: resistant to salt spray corrosion, long-term reliable operation.
1. Middle East Seawater Desalination Project
DN1200 HDPE pipes are used to transport high-pressure seawater to the reverse osmosis system, replacing the original glass fiber reinforced plastic (FRP) pipes.
8 years of operation without corrosion and leakage, maintenance costs reduced by 60%.
2. Norwegian offshore wind power pile foundation protection
HDPE casing protects steel piles from corrosion by high-salinity seawater in the North Sea, with a design life of 50 years.
HDPE pipes are becoming the preferred solution to replace traditional metal pipes in marine engineering with their unique corrosion resistance, lightweight and long life advantages. With the development of materials science and marine engineering technology, the application potential of HDPE in deep-sea energy, ecological protection and other fields will be further released, providing reliable support for sustainable marine development.
Official website: www.phtopindustry.com | www.pefitting.net
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
In modern fire protection systems, the choice of pipe materials is directly related to the reliability and safety of the system. FM-certified HDPE pipes have become the preferred material for fire protection system construction due to their excellent performance and reliable quality. In this field, Puhui Industry, as the only FM-certified HDPE pipe manufacturer in China, is leading the development direction of the industry.
HDPE pipes have excellent corrosion resistance and can effectively resist the erosion of chemicals, ensuring that the pipes maintain structural integrity during long-term use. Its high impact resistance and flexibility enable the pipes to withstand external impact and ground settlement, reducing the risk of pipe rupture. FM-certified HDPE pipes undergo rigorous fire performance tests to ensure that the normal operation of the system can be maintained in the event of a fire. The FM-certified HDPE pipes produced by Puhui Industry fully meet these strict technical standards.
FM-certified HDPE pipes use advanced hot-melt connection technology to achieve seamless connection of the pipe system and completely eliminate leakage hazards. The smooth inner wall of the pipe and excellent hydraulic characteristics can significantly reduce head loss and improve the water supply efficiency of the fire protection system. Its lightweight characteristics make the installation process more convenient, greatly shorten the construction period, and reduce engineering costs. Puhui Industry relies on its advanced production technology and strict quality control to ensure that every pipe meets the highest international standards.
With the continuous advancement of fire protection technology, FM-certified HDPE pipes will continue to play their unique advantages and provide reliable protection for building fire safety. As the only HDPE pipe manufacturer in China with FM certification, Puhui Industry will continue to adhere to technological innovation, strictly control product quality, and promote Chinese fire protection products to the world. Its excellent performance and economic benefits will surely promote the wider application of FM-certified HDPE pipes in the construction of fire protection systems.
Official website: www.phtopindustry.com | www.pefitting.net
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