RIGID TWIN WALL DRAINAGE PIPES
Twin wall HDPE (high density polyethylene) drainage pipes are manufactured from high quality Cherrylene rHDPE and available in a range of sizes from 100mm up to 3500mm diameter, in six metre lengths either perforated or non-perforated.
Separate slim-line couplers, bends (15, 30, 45 and 90°), wye and tee junctions are available and also rubber seals to achieve an effective watertight joint if required.
The outer wall is corrugated while the inner wall is smooth to give a superior hydraulic flow. It is a combination of the corrugations combined with the heat welding of the two walls that gives the pipe its unique strength. It is this strength that makes it suitable for installation to depths of up to ten metres and its smooth inner wall ensures increased flow capacity.
Twin wall has superseded the concrete pipe as a lightweight, yet equally as strong alternative which makes transporting, handling and installation easier. It has a broad range of applications and is suitable for use in Civil Engineering, Construction, Sports Amenity, Agricultural and sub-soil applications. It can also be used for surface and storm water drainage as well as land drainage.
We stock BBA HAPAS Roads and Bridges approved Cherry Pipes up to 600mm diameter and an extensive range of fittings throughout the year. Larger diameter pipes are available upon request.
| Nominal I/D (mm) |
Nominal O/D (mm) |
| 94 | 110 |
| 150 | 178 |
| 225 | 266 |
| 300 | 354 |
| 375 | 425 |
| 450 | 514 |
| 600 | 688 |
Twin wall Features:
- Plastic pipe can be laid four times faster than concrete pipes.
- It requires only 50% of plant normally used to lay concrete pipe.
- Easier handling as weighs considerably less than concrete.
- High strength and durability therefore far less likely to suffer on-site damage.
- Easier cutting at entries to manholes for rocker pipes.
- Provides a faster flow meaning it is more likely to keep itself cleaner than single wall pipe.
- Six metre lengths mean fewer joints and faster installation compared to precast concrete pipes.
- Plastic pipe is resistant to naturally occurring chemicals.
- Safer to use in relation to health and safety issues.