HDPE double¡ªwall corrugated pipe is a plastic pipe manufactured by extrusion molding with HDPE as the main raw material. It features a smooth inner wall, an arc-shaped corrugated outer wall, and a hollow structure between the inner and outer corrugations.
It is suitable for buried drainage and communication sheathing with a long-term service temperature not exceeding 45¡æ, and can also be used for industrial drainage and sewage pipes.
1. Implementation Standard
Polyethylene (PE) Structured Wall Pipe Systems for Buried Applications ¡ª Part 1: Polyethylene Double-Wall Corrugated Pipes
2. Performance Features
High ring stiffness: The corrugated structure delivers high strength, excellent rigidity and flexibility, as well as good compression and impact resistance.
Low flow resistance: The smooth inner wall reduces fluid friction and improves flow capacity.
Good sealing performance: Connected with elastic sealing rings for easy installation and leak-free joints.
Convenient construction: Light weight for easy transportation and good anti-settling performance.
Long service life: Corrosion-resistant to acids, alkalis and other chemical media, with high wear resistance.
Low overall cost: Light weight eliminates the need for cranes, shortens construction period and reduces total project cost.
3. Product Dimensions
Nominal ring stiffness class
Grade | SN2 | SN4 | (SN6.3) | SN8 | (SN10) | SN12.5 | SN16 |
Ring stiffness/(kN/m2) | 2 | 4 | (6.3) | 8 | (10) | 12.5 | 16 |
Note: The values in parentheses are non-preferred grades. |
Pipe dimensions for the internal diameter series
Unit£ºmm
Nominal inner diameter
DN/ID | Minimum average internal diameter
dim, min | Minimum lamination wall thickness
e min | Minimum inner layer wall thickness
e1, min |
Minimum outer layer wall thickness
e3, min
| Minimum joint length
A min |
100 | 95 | 1.0 | 0.8 | 0.7 | 32 |
125 | 120 | 1.2 | 1.0 | 0.8 | 38 |
150 | 145 | 1.3 | 1.0 | 0.8 | 43 |
200 | 195 | 1.5 | 1.1 | 0.9 | 54 |
225 | 220 | 1.7 | 1.4 | 0.9 | 55 |
250 | 245 | 1.8 | 1.5 | 1.0 | 59 |
300 | 294 | 2.0 | 1.7 | 1.0 | 64 |
400 | 392 | 2.5 | 2.3 | 1.4 | 74 |
500 | 490 | 3.0 | 3.0 | 1.8 | 85 |
600 | 588 | 3.5 | 3.5 | 2.1 | 96 |
800 | 785 | 4.5 | 4.5 | 2.7 | 118 |
1000 | 985 | 5.0 | 5.0 | 3.0 | 140 |
1200 | 1185 | 5.0 | 5.0 | 3.0 | 162 |
ËÄ¡¢Performance Index
Physical and mechanical properties of the pipe
Item | Specification | Test method |
Ring stiffness/(kN/m2) | SN2a SN4
SN6.3a
SN8
SN10a
SN12.5
SN16 | ¡Ý2 ¡Ý4
¡Ý6.3
¡Ý8
¡Ý10
¡Ý12.5
¡Ý16 | GB/T9647¡ª2015 |
Impact resistance(TIR)/% | ¡Ü10 | GB/T14152¡ª2001 |
Ring flexibility |
The pipe shall be free of cracks, no separation between the two walls, and no reverse bending of the inner wall | ISO 13968:2008 |
Oven test | No delamination, no cracking | GB/T19472.1-2019£»8.7 |
Density/(kg/m3 ) | ¡Ü1180 | GB/T1033.1¡ª2008 |
Oxidation induction time(200 ¡æ )/min | ¡Ý20 | GB/T19466.6¡ª2009 |
Creep ratio | ¡Ü4 | GB/T18042¡ª2000 |
a Not a preferred grade |
V. Application Fields
Municipal engineering and rural sewage disposal projects: Used as drainage and sewage pipes;
Construction engineering: Used as rainwater pipes, underground drainage pipes, sewage pipes and ventilation pipes for buildings;
Communication equipment: Used as protective pipes for communication cables and optical cables;
Agricultural garden engineering: Used for drainage in farmland, fruit tea gardens and forest belts;
Road engineering: Used as seepage and drainage pipes for railways and expressways;
Mines: Used as ventilation, air supply and drainage pipes in mines.
