In many fields such as modern infrastructure construction, agricultural irrigation, municipal drainage and industrial transportation, high-density polyethylene pipe (HDPE pipe) has become a popular choice in the market due to its excellent corrosion resistance, flexibility and ultra-long service life. Among the many HDPE pipe suppliers, Puhui Industry, as a well-known manufacturer in the industry, has won the unanimous trust of global customers by providing customers with high-quality, cost-effective HDPE pipe products with its strong production strength and direct sales model.
Puhui Industry adopts the factory direct sales model to effectively reduce the cost of intermediate links, allowing customers to obtain high-quality products at a more competitive price. Whether it is engineering project procurement or bulk wholesale cooperation, Puhui can provide customized price plans according to customer needs, greatly improve procurement efficiency and reduce overall costs.
All HDPE pipes of Puhui Industry are made of PE100 grade raw materials and are produced in strict accordance with ISO, GB and other domestic and international standards. The product has excellent tensile strength, wear resistance and impact resistance, with a service life of more than 50 years. It is widely used in water supply, drainage, gas, electricity, communications, mining and other scenarios.
Puhui can provide HDPE pipes and fittings with various diameters from 20mm to 1600mm, and support customers to customize products with different colors, wall thicknesses and pressure levels. Whether it is a small agricultural drip irrigation system or a large-scale municipal engineering pipeline laying, Puhui can respond quickly and provide a one-stop solution.
As an international enterprise, Puhui Industry has advanced production equipment and a complete quality management system, and its products are exported to many countries and regions such as Southeast Asia, the Middle East, Africa, and South America. Each batch of products shipped from the factory has been strictly tested to ensure stable operation under different climates and construction environments.
Puhui has multiple modern storage bases and an efficient logistics system to ensure fast delivery and timely delivery. At the same time, the company is equipped with an experienced pre-sales and after-sales technical team to provide customers with full-process service support from product selection, installation guidance to after-sales maintenance.
Choosing Puhui Industry means choosing the dual guarantee of quality and efficiency. If you are looking for a trustworthy HDPE pipe manufacturer, welcome to contact Puhui to enjoy the price advantage and professional service of factory direct sales and create a bright future of win-win cooperation!
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
Puhui Industry is a well-known manufacturer of high-density polyethylene (HDPE) pipes in China. Its products are widely used in municipal water supply, agricultural irrigation, mining transportation and other fields. HDPE pipes have become an ideal choice for modern infrastructure construction due to their corrosion resistance, long life and diverse connection methods.
Puhui Industry provides a variety of HDPE pipes, and the price varies depending on factors such as pipe diameter, pressure level, and wall thickness. The following are reference prices for some products:
75mm diameter HDPE pipe: The price is about $0.20 to $2.10 per meter, suitable for water supply, gas transportation, mining and other fields.
300mm diameter HDPE pipe:
Ordinary type (low pressure level, thin wall): about 200 to 300 yuan per meter.
Medium type (medium pressure level, standard wall thickness): about 300 to 400 yuan per meter.
900mm diameter HDPE pipe: The price is about $0.40/meter, suitable for large water conservancy projects and municipal projects.
1400mm to 1600mm diameter HDPE pipe: The price is about $0.36/meter, suitable for extra-large engineering projects.
The price of HDPE pipes is affected by many factors, including:
Diameter and wall thickness: The larger the diameter and the thicker the wall, the more raw materials are required, and the price increases accordingly.
Pressure rating (SDR): The higher the pressure rating, the greater the internal pressure the pipe needs to withstand, and the manufacturing cost increases accordingly. Raw material cost: The fluctuation of HDPE raw material price directly affects the price of the final product.
Production process and certification: Products that use advanced production technology and obtain international certifications (such as ISO, CE, WRAS, ROHS) have more guaranteed quality and relatively higher prices.
Transportation and tariffs: For export products, transportation costs and import tariffs will also have an impact on prices.
Due to the variety of specifications of HDPE pipes, it is recommended that you contact us directly to obtain a detailed quotation before purchasing. You can contact us in the following ways:
Official website: www.phtopindustry.com
Email: inquiry@phtopindustry.com
WhatsApp: +86 15093100892
Provide your specific needs (such as pipe diameter, pressure level, application scenario, etc.) so that we can provide you with the most suitable products and quotations.
Puhui Industry is committed to providing high-quality HDPE pipes and accessories to customers around the world. With its rich production experience and strict quality control, it has won wide market recognition. Whether it is municipal engineering, agricultural irrigation or industrial transportation, Puhui's products are a trustworthy choice.
In modern pipeline engineering, the connection between HDPE (high-density polyethylene) pipes and steel pipes is a common technical requirement. Due to the significant differences in the properties of the two materials, how to achieve a safe and reliable connection has become the key point in the implementation of the project. This article will systematically introduce the connection methods, technical points and precautions of HDPE pipes and steel pipes.
1. Flange connection method
Working principle:
Welding PE flange joints at the end of HDPE pipes
Welding steel flanges at the end of steel pipes
Connection is achieved by bolting
Implementation steps:
Hot-melt connection of HDPE pipe ends to PE flanges
Welding matching steel flanges at the end of steel pipes
Installing sealing gaskets between the two flanges
Tightening bolts evenly and symmetrically
Advantages:
Reliable connection, strong pressure bearing capacity
Convenient for later maintenance and disassembly
Wide application range (commonly used for pressure pipes)
2. Socket and spigot connection method
Working principle:
Using steel conversion joints
One end is designed as a socket to connect HDPE pipes
The other end is designed as a spigot to connect steel pipes
Implementation steps:
Insert HDPE pipe into the socket of the joint and fix it by hot-melt
Welding steel pipes to the spigot end of the joint
Adding sealing rings to enhance sealing when necessary
Advantages:
Easy and quick installation
Applicable to small and medium-sized pipes
Relatively low cost
3. Threaded connection method
Applicable conditions:
Small diameter pipes (DN≤110mm)
Low pressure working system
Implementation points:
HDPE pipe end hot-melt threaded PE joint
Steel pipe end processing matching external thread
Use sealing tape to enhance sealing
Precautions:
Not suitable for high pressure pipes
Seal status needs to be checked regularly
1. Selection of transition joints
Material should comply with GB/T 13912 standard
Pressure level should match pipeline design requirements
Interface size should be accurately measured and confirmed
2. Hot melt connection process control
Temperature control: 200-220℃ is appropriate
Pressure control: 0.15-0.3MPa
Time control: adjusted according to pipe diameter
3. Anti-corrosion treatment
Steel pipe welding parts need to be treated with anti-corrosion
Anti-corrosion coating or heat shrink sleeve can be used
Contacts of dissimilar metals should be insulated
4. Stress relief measures
Set flexible joints or expansion joints
Add piers at pipeline bends
Long-distance pipeline segment connection
Preparation before construction:
Check the quality certification documents of pipes and fittings
Measure and record the interface size
Clean the connection parts
Installation process control:
Maintain the concentricity of the connection parts
Avoid strong assembly
Perform pressure test according to the requirements of the specification
Safety matters:
Pay attention to fire prevention during hot melt operation
Take good protection when welding steel pipes
Set up warning signs in the operation area
Appearance inspection:
No visible defects in the connection parts
Anti-corrosion layer intact
Flange bolts are tightened evenly
Pressure test:
Strength test: 1.5 times the design pressure
Tightness test: 1.1 times the design pressure
Other tests:
Ultrasonic testing when necessary
Check the welding quality of hot-melt joints
The connection between HDPE pipe and steel pipe is a key technical node in pipeline engineering. Only by selecting the appropriate connection method and strictly controlling the construction quality can the long-term safe operation of the pipeline system be ensured. In actual projects, the most economical and reliable connection scheme should be selected according to factors such as pipeline specifications, working pressure, and medium characteristics, and construction and acceptance should be carried out in strict accordance with relevant specifications and standards.
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
High-Density Polyethylene (HDPE) pipes have become widely used in modern municipal engineering, water supply and drainage systems, gas transmission, and other fields due to their excellent corrosion resistance, flexibility, long service life, and cost-effectiveness. However, in practical applications, the proper determination of the installation depth directly affects the pipeline's safe operation and longevity. This article systematically introduces the relevant standards, influencing factors, and best practices for HDPE pipe installation depth.
1. National Standards
According to China's Code for Construction and Acceptance of Water and Sewerage Pipeline Engineering (GB 50268) and related industry standards:
Municipal water supply networks: Minimum cover depth is generally no less than 0.7 m, and no less than 1.0 m under vehicle lanes.
Drainage pipelines: Minimum cover depth typically ranges from 0.8–1.2 m, depending on pipe diameter and surface load.
Gas pipelines: The minimum cover depth for PE gas pipes should be no less than 0.9 m under vehicle lanes and 0.6 m under non-vehicle lanes.
2. Depth Requirements for Different Application Scenarios
Application Scenario | Minimum Cover Depth (m) | Special Requirements |
Sidewalks/green belts | 0.6–0.8 | Consider plant root impact |
Non-vehicle lanes | 0.8–1.0 | Additional protective layer recommended |
Vehicle lanes | 1.0–1.2 | Warning tape and reinforced protection required |
Farmland areas | 0.8–1.2 | Consider plowing depth and machinery operation |
Frozen soil regions | 0.3 m below frost line | Prevent frost heave damage |
Surface load: Dynamic/static vehicle loads and future load predictions.
Soil properties: Backfill compaction (usually ≥90%), soil corrosivity, groundwater level.
Climate conditions: Frost line depth (critical in northern regions), rainfall, and drainage.
Pipe parameters: Diameter (SDR value), pressure rating, ring stiffness.
Crossing protection: Minimum vertical spacing (generally ≥0.3 m) from other underground utilities.
Shallow burial: If minimum depth cannot be met:
Install reinforced concrete protective slabs.
Use pipes with higher ring stiffness.
Place visible warning markers and tape.
High groundwater level:
Implement drainage measures.
Add ballast or anchoring.
Consider buoyancy effects.
Rocky terrain:
Lay a 10–15 cm sand cushion.
Avoid direct contact with sharp rocks.
Trench excavation: Ensure a smooth base, remove hard debris, and maintain design slope.
Backfill material: Prefer sandy soil or fine soil (<20 mm), compacted in layers.
Compaction control:
Base layer (≥90% compaction).
Pipe sides (≥95%).
Top 0.5 m above pipe (≥85%).
Warning markers: Install bright warning tape 30 cm above the pipe.
European and American standards are more flexible, emphasizing site-specific assessments:
U.S. ASTM standards: Minimum 0.6 m cover but adjustable via engineering analysis.
European EN standards: Focus on soil-structure interaction rather than fixed depths.
Australian AS/NZS 2566: Uses a "design factor" method to determine depth.
Determining the appropriate installation depth for HDPE pipes requires a comprehensive evaluation of load conditions, soil characteristics, and pipe performance. In practice, a "site-specific" approach should be adopted, ensuring compliance with national standards while optimizing the design through professional analysis. Proper construction techniques and strict quality control are equally crucial for long-term pipeline safety.
As HDPE pipe technology advances and engineering experience accumulates, relevant standards continue to evolve. Engineers should stay updated with the latest specifications to ensure scientific and cutting-edge design and construction practices.
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
High-density polyethylene (HDPE) pipes are widely used in water supply, drainage, gas transmission, and industrial pipelines due to their excellent corrosion resistance, flexibility, long service life, and environmental friendliness. To ensure the quality of HDPE pipe construction, strict compliance with relevant specifications is essential. This article details the construction standards for HDPE pipes, covering key stages such as material inspection, storage, welding, installation, and backfilling.
1. Material Inspection
Check the factory certificates, test reports, and specifications of pipes and fittings to ensure compliance with design requirements.
Visual inspection: Pipes must be free of cracks, dents, bubbles, or impurities, with uniform color and clear markings.
Dimensional inspection: Pipe diameter and wall thickness must meet national standards (e.g., GB/T 13663, ISO 4427).
2. Storage Requirements
HDPE pipes should be stored on a flat, ventilated site, avoiding direct sunlight and high temperatures (recommended temperature ≤ 40°C).
Stacking height should not exceed 1.5 meters to prevent deformation.
Pipes must be kept away from sharp objects to avoid scratches.
HDPE pipes are primarily joined using butt fusion welding or electrofusion welding, with strict adherence to welding procedures.
1. Butt Fusion Welding
Preparation
Verify welding machine temperature (typically 210±10°C) and pressure settings.
Clean pipe ends to remove oil, dirt, or debris.
Use clamps to align pipes properly.
Welding Process
Heating phase: Heat pipe ends until molten (duration depends on pipe diameter and wall thickness).
Transition phase: Quickly remove the heating plate to prevent oxidation.
Joining phase: Apply pressure to fuse the ends and maintain pressure during cooling.
Quality Inspection
Check for uniform weld beads with no cracks or weak joints.
Bead height should meet standards (typically 10%~20% of wall thickness).
2. Electrofusion Welding
Preparation
Clean pipe and fitting surfaces, removing oxidation layers.
Ensure electrofusion fittings match pipe specifications.
Welding Process
Insert pipe into the electrofusion coupler until fully seated.
Apply electricity according to the manufacturer’s voltage and time parameters.
Do not move the pipe during cooling.
Quality Inspection
Check indicator pins on fittings to confirm proper fusion.
1. Trench Excavation
Trench width should accommodate pipe installation and backfilling (minimum ≥ pipe outer diameter + 300mm).
Trench bottom must be level and free of sharp rocks; soft soil requires compaction or a sand bedding layer.
2. Pipe Laying
Use manual or mechanical methods to lower pipes, avoiding throwing or dragging.
Minimum bending radius ≥ 25 times pipe diameter to prevent deformation.
Install protective sleeves when crossing roads or structures.
Initial backfill: Use fine sand or soft soil (free of rocks) up to 300mm above the pipe, compacted in layers (≤ 200mm per layer).
Final backfill: Compact in layers as per design requirements; avoid direct heavy machinery pressure on pipes.
Hydrostatic test: Gradually increase pressure to 1.5 times working pressure, hold for 30 minutes; pass if pressure drop ≤ 5%.
Leak test (gas pipelines): Apply soap solution to check for leaks at joints.
Welders must wear protective gloves and goggles.
Mark construction zones with warning signs to prevent pipe damage.
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