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
HDPE (high-density polyethylene) pipelines have become the preferred pipe material in municipal engineering, water supply and drainage systems, gas transmission and other fields due to their excellent corrosion resistance, flexibility and long life. However, to ensure the long-term stable operation of the pipeline system, standardized construction technology is essential. This article will introduce in detail the key technical points of HDPE pipeline construction, covering the core content of the whole process such as material acceptance, welding process, laying and installation, quality inspection, etc.
1. Material acceptance and storage
Pipe inspection:
Check product certificates and test reports (comply with GB/T 13663, ISO 4427 and other standards)
Check the appearance of the pipe: no bubbles, cracks, depressions or impurities, the port is flat and burr-free
Measure wall thickness and diameter deviation (≤±1.5%)
Preparation of pipe fittings and welding machines:
Matching flanges, elbows, tees, etc. must be made of the same material as the pipe (PE100/PE80)
The hot melt welding machine needs to be calibrated for temperature (210±10℃) and pressure parameters
Storage requirements:
Avoid direct sunlight, stacking height ≤1.5 meters, and support with wooden squares at the bottom
2. Site survey and design
Confirm the pipeline direction, elevation, and slope (≥0.5%) according to the construction drawings
Check underground obstacles (cables, other pipelines) and mark them
Plan welding pits (width ≥ pipe diameter + 1m, length ≥2m)
1. Butt fusion
Applicable scenarios: pipes with DN ≥ 90 mm
Construction process:
End milling: use a milling cutter to cut the pipe end to a flat surface with a gap of ≤ 0.3 mm
Heating with a heating plate: the temperature is controlled at 200-220°C, and the heating time is adjusted according to the wall thickness (refer to the table below)
Pipe Wall Thickness (mm) | Heating Time (sec) | Changeover Time (sec) | Cooling Time (min) |
4-10 | 30-50 | ≤5 | 6-8 |
10-20 | 50-80 | ≤6 | 8-10 |
>20 | 80-120 | ≤8 | 10-15 |
Butt pressurization: pressure is controlled in stages (absorption pressure 0.15MPa, welding pressure 0.2MPa)
Cooling and shaping: It is forbidden to move the pipeline during natural cooling
Key control points:
Even welding flange (height ≈ 1/3 of the pipe wall thickness)
No cold weld, carbonization or impurities in the weld
2. Electrofusion
Applicable scenarios: small pipe diameter (DN≤315mm) or repair work
Operation points:
Scrape off the oxide layer at the pipe mouth (length ≥ socket depth of electrofusion sleeve)
Use a barcode scanner to check the electrofusion sleeve parameters (voltage, time)
No water injection or pressurization during cooling
1. Trench excavation and foundation treatment
Trench bottom width: D (pipe diameter) + 0.5m (DN ≤ 500mm)
Foundation cushion:
General soil: Lay 10cm sand cushion
Soft soil foundation: Replace 30cm gravel + geogrid reinforcement
Slope control: Use laser level to check, deviation ≤ ± 0.1%
2. Pipeline installation
Pipe lowering method: Flexible sling lifting (wire rope is prohibited from directly contacting the pipe)
Bending radius: ≥ 25 times the pipe diameter (avoid stress concentration)
Pier setting: Pour concrete at the valve and tee to fix
3. Backfill technical requirements
Backfilling Layer | Material Requirements | Compaction Requirement |
Pipe bottom to 30cm above pipe | Fine sand or gravel ≤10mm in diameter | ≥90% |
Within 50cm above pipe | Native soil (remove rocks & frozen soil) | ≥85% |
More than 50cm above pipe | Compacted in layers | ≥95% |
Notes:
When backfilling, the internal pressure of the pipeline must be maintained at 0.05MPa to prevent deformation
Test the compaction degree layer by layer (ring knife method test)
1. Non-destructive testing
Appearance inspection: symmetrical weld flanges and no cracks
Ultrasonic testing: spot check the internal fusion of the weld (≥10% ratio)
Air pressure test:
Strength test: 1.5 times the working pressure, stable pressure for 1h without leakage
Tightness test: 1.15 times the working pressure, 24h pressure drop ≤1%
2. Common problem handling
Problem Phenomenon | Root Cause Analysis | Solution |
Uneven weld bead | Uneven heating plate temperature | Replace heating plate, re-weld |
Local pipe depression | Insufficient backfill compaction | Excavate and re-compact |
Joint leakage | Incorrect electrofusion parameters | Cut out section, use repair coupler |
1. Welding operation area: set up cordons and equip fire-fighting equipment
2. Groove protection: install warning lights at night, and the slope gradient is ≤1:0.5
3. Environmental protection measures: waste welding shavings are classified and recycled to avoid soil pollution
The construction quality of HDPE pipelines is directly related to the life of the system, and the three core links of material selection, welding process, and backfill compaction must be strictly controlled.
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
HDPE pipe (high-density polyethylene pipe) is widely used in municipal water supply and drainage, gas transmission, agricultural irrigation, industrial pipelines and other fields due to its advantages such as corrosion resistance, impact resistance, good flexibility and long life. Compared with traditional steel pipes, cast iron pipes and PVC pipes, HDPE pipes have the following outstanding features:
1. Strong corrosion resistance: not affected by acid, alkali, soil, and microorganisms, and the service life can reach more than 50 years.
2. Compression and impact resistance: good flexibility, can adapt to foundation settlement, and not easy to break.
3. Light weight and easy construction: lighter than metal pipes, low transportation and installation costs.
4. Environmentally friendly and non-toxic: meets food grade standards and can be used for drinking water transportation.
5. Convenient connection: hot-melt butt or electric fusion connection, good sealing and no leakage risk.
As a professional HDPE pipe manufacturer, we provide HDPE pipe products with direct supply from the source, preferential prices and reliable quality, covering water supply pipes, drainage pipes, gas pipes, dredging pipes and other types to meet the needs of different projects.
1. Lower price, no price difference between middlemen
The factory direct sales model eliminates the links of agents and distributors, directly benefits customers, and provides industry competitive prices, which is especially suitable for large-scale procurement of projects.
2. Complete specifications and customized production
Diameter range: DN20-DN2000, to meet different flow requirements.
Pressure level: PN0.6MPa-PN2.5MPa, to adapt to different pressure requirements.
Special customization: special HDPE pipes such as UV-resistant, flame-retardant, and enhanced can be provided.
3. Strict quality inspection and quality assurance
The raw materials are made of high-quality PE100/PE80, which meets national standards such as GB/T 13663 and ISO 4427.
The production line is fully automated to ensure uniform wall thickness, no bubbles, and no impurities.
Each batch of products passes hydraulic test, impact test, ring stiffness test, and provides quality inspection report.
1. Municipal engineering: urban water supply and drainage, rainwater and sewage pipe network, integrated pipe gallery.
2. Gas transmission: PE gas pipe, safe and leak-proof, resistant to high pressure.
3. Agricultural irrigation: drip irrigation and sprinkler irrigation systems, strong weather resistance and long life.
4. Industrial pipelines: corrosion-resistant transmission pipes in chemical, electric power, mining and other fields.
5. Communication sheath pipe: protect optical fiber cables, flexible and pressure-resistant.
1. Clear purpose: different uses such as water supply, drainage, gas, cable sheath, etc. have different requirements for pipes.
2. Select pressure level: select PN0.6MPa, PN1.0MPa or higher pressure pipes according to working pressure.
3. Pay attention to ring stiffness: buried drainage pipes need to choose high ring stiffness pipes such as SN8 and SN10 to prevent deformation.
4. Look for regular manufacturers: check production qualifications and test reports to avoid inferior products.
Contact us to get a quote for HDPE pipes!
Puhui is a professional HDPE pipe manufacturer, providing one-stop services such as wholesale, customization, and technical consultation. If you have HDPE pipe procurement needs, please call us or inquire online, we will provide you with the best solution!
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
HDPE (high-density polyethylene) pipes are widely used in municipal water supply, agricultural irrigation, industrial drainage and other fields due to their corrosion resistance, impact resistance and long life. As a well-known domestic pipe supplier, Puhui Industry's HDPE pipes are favored by the market for their high cost-effectiveness and stable quality. This article will analyze the factors of HDPE pipe price per meter in detail and compare industry competitors to help you make more economical purchasing decisions.
1. Raw material cost
HDPE resin price fluctuations (affected by the international crude oil market).
The cost of adding modified materials such as anti-UV and antioxidants.
2. Specification parameters
Diameter (DN): Common specifications such as DN50, DN100, DN200, etc. The larger the diameter, the higher the unit price.
Pressure level (PN): PN6, PN10, PN16, etc. The stronger the pressure bearing capacity, the higher the price.
Wall thickness: The price difference between SDR11 (thin wall) and SDR17 (thick wall) is significant.
3. Production process
Pipes using imported extrusion equipment have higher precision and slightly higher prices.
Whether it has passed ISO9001, GB/T 13663 and other certifications.
4. Purchase quantity
Wholesale price (such as more than 1000 meters) is usually 10%-20% lower than retail price.
Specifications (DN) | Pressure level (PN) | Wall thickness (SDR) | Unit price (yuan/m) | Applicable scenarios |
DN50 | PN6 | SDR17 | 8-12 | Domestic water supply/small irrigation |
DN100 | PN10 | SDR11 | 25-35 | Municipal water supply |
DN200 | PN10 | SDR11 | 80-110 | Industrial drainage |
DN300 | PN16 | SDR9 | 180-240 | High pressure water delivery |
Note: Prices may fluctuate due to region, order volume, and shipping costs, and are subject to the latest quotation.
1. Price competitiveness
Compared with international brands (such as Georg Fischer and Aliaxis), Puhui pipes of the same specifications are 15%-30% cheaper.
Compared with similar domestic products (such as Liansu and Yonggao), the price is similar but the quality assurance is better (10-year warranty is provided).
2. Performance guarantee
Weather resistance: Add anti-UV agent, suitable for long-term outdoor use.
Environmental protection: Meets GB/T 17219 drinking water hygiene standard.
3. Service support
Free technical selection guidance.
Support customized length (6m/9m/12m) and connection accessories (flange, electric fusion sleeve).
Puhui Industry's HDPE pipes achieve a good balance between price and quality, especially for projects that are budget-sensitive but unwilling to compromise on performance. For accurate quotations, it is recommended to provide specific parameters (such as diameter, pressure, purchase volume) and contact us for the latest price list.
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