With the acceleration of urbanization and the improvement of environmental protection requirements, the reliability and durability of sewage transportation systems have become crucial. HDPE (high-density polyethylene) pipes have become the preferred material for sewage collection, transportation and treatment systems due to their excellent corrosion resistance, flexibility and long life. This article will deeply explore the unique advantages, key technical parameters and engineering application points of HDPE pipes in sewage systems.
1. Excellent corrosion resistance
Completely resistant to corrosion by chemicals such as acids, alkalis, and salts in sewage
Not affected by electrochemical corrosion, no additional anti-corrosion treatment required
Smooth inner wall, not easy to scale after long-term use, and maintains stable flow
2. Excellent mechanical properties
High ring stiffness (SN4-SN16) can withstand soil pressure for deep burial
Good impact resistance, adaptable to complex geological conditions
Good flexibility, can resist foundation settlement and earthquake effects
3. Ultra-long service life
Designed service life of more than 50 years
UV-resistant formula suitable for outdoor installation
Excellent wear resistance, especially suitable for sewage transportation containing solid particles
4. Environmental protection and economy
100% recyclable materials, in line with environmental protection requirements
Light weight, low transportation and installation costs
Hot-melt connection ensures zero leakage and reduces maintenance costs
{C}1. {C}Pipe diameter selection guide
|
Application Scenario |
Recommended pipe diameter (mm) |
Remark |
|
Residential sewage collection |
DN110-DN315 |
Meet daily drainage needs |
|
Municipal sewage main pipe |
DN400-DN800 |
High flow rate delivery |
|
Industrial wastewater discharge |
DN200-DN1200 |
Select according to wastewater characteristics |
|
Internal pipe network of sewage treatment plant |
DN315-DN1000 |
High chemical corrosion resistance requirements |
2. Key performance indicators
Ring stiffness: SN4/SN8/SN12/SN16 grades are available
Pressure level: PN6-PN16 (selected according to the transportation method)
Connection method: hot melt butt, electric fusion connection, socket connection
Color identification: usually black with blue line (easy to identify)
1. Design considerations
Reasonably plan the slope (usually 0.5%-2%)
Calculate the peak flow to determine the pipe diameter
Consider future expansion needs
2. Installation and construction specifications
Trench excavation: ensure that the bottom is flat and free of sharp objects
Foundation treatment: Sand cushion thickness ≥ 100mm
Backfill requirements: compaction in layers, control compaction degree
Connection quality: 100% inspection of hot melt joints
3. Special environment solutions
High groundwater level: use counterweight design to prevent floating
Rock geology: use thickened pipe or casing protection
Traffic load area: choose high ring stiffness pipe (SN12 or above)
1. Wastewater renovation project in a coastal city
DN600 HDPE pipes were used to replace the original concrete pipes
Successfully solved the problem of seawater backflow corrosion
Construction period was shortened by 30%, and the expected service life was extended to 50 years
2. Industrial park wastewater treatment system
SN16 grade DN800 HDPE pipes were used
Tolerant to strong acid and alkaline wastewater with pH2-11
5 years of operation with zero leakage record
As an industry-leading HDPE pipe manufacturer, Bestom provides:
A full range of HDPE pipes for sewage (DN110-DN1200)
Customized ring stiffness and pressure rating
Compliant with international standards such as ISO4427, GB/T19472
Professional technical support and construction guidance
With its comprehensive performance advantages, HDPE pipes are gradually replacing traditional sewage pipe materials worldwide. Correctly selecting pipe diameter specifications and standardizing construction can ensure the long-term stable operation of the sewage system and significantly reduce the cost of the entire life cycle.
