Flexible Permeable Pipe is a professional underground drainage material designed to provide long-term seepage control and efficient groundwater discharge in modern civil engineering projects. The product integrates spring steel reinforcement technology, permeable nonwoven filtration fabric, and polypropylene filament protection into one high-performance drainage system.
The internal spring steel structure supports the pipe body and provides strong compression resistance under soil pressure. Meanwhile, the outer nonwoven filter fabric allows groundwater to quickly penetrate into the drainage pipe while preventing fine particles and sediment from entering the system. This integrated filtration mechanism effectively reduces blockage risks and ensures long-term drainage stability.
Flexible Permeable Pipe is highly flexible and can easily adapt to uneven settlement foundations, curved installations, and complicated terrain conditions. Unlike rigid drainage pipes, it maintains stable drainage performance even under bending or displacement conditions.
The pipe is widely used in soft soil foundation reinforcement, retaining wall drainage, tunnel seepage systems, highway drainage engineering, railway construction, landfill leachate collection, airport drainage systems, and municipal underground engineering. It is also suitable for mining projects, sports grounds, landscaping drainage, and slope stabilization systems.
Because of its lightweight structure and convenient connection method, installation becomes faster and more economical. Contractors can significantly reduce transportation difficulty, labor intensity, and overall project costs.
The external polypropylene fiber layer provides strong protection against environmental aging, corrosion, acid and alkali erosion, and underground biological damage. Therefore, Flexible Permeable Pipe offers excellent durability and long service life even in harsh underground environments.
| Specification | FH50 | FH80 | FH100 | FH150 | FH200 | FH250 |
|---|---|---|---|---|---|---|
| Diameter | 50mm | 80mm | 100mm | 150mm | 200mm | 250mm |
| Steel Wire Diameter | 1.6mm | 2.0mm | 2.6mm | 3.5mm | 4.5mm | 5.0mm |
| Coil Quantity | 55/m | 40/m | 34/m | 25/m | 19/m | 19/m |
| Filter Layer Thickness | 0.30mm | 0.34mm | 0.36mm | 0.38mm | 0.42mm | 0.60mm |
| Tensile Strength MD | ≥1KN/5cm | ≥1KN/5cm | ≥1KN/5cm | ≥1KN/5cm | ≥1KN/5cm | ≥1KN/5cm |
| Tensile Strength CMD | ≥0.8KN/5cm | ≥0.8KN/5cm | ≥0.8KN/5cm | ≥0.8KN/5cm | ≥0.8KN/5cm | ≥0.8KN/5cm |
| Elongation MD | ≥12% | ≥12% | ≥12% | ≥12% | ≥12% | ≥12% |
| Ball Bursting Strength | ≥1.1KN | ≥1.1KN | ≥1.1KN | ≥1.1KN | ≥1.1KN | ≥1.1KN |
| Water Permeability Coefficient | ≥0.1cm/s | ≥0.1cm/s | ≥0.1cm/s | ≥0.1cm/s | ≥0.1cm/s | ≥0.1cm/s |
| Compression Resistance 5% | 4400N/m | 6000N/m | 7200N/m | 8000N/m | 9200N/m | 10400N/m |


Why Choose Our Flexible Permeable Pipe
Yes. The pipe materials are resistant to underground corrosion, moisture, and biological erosion, allowing long-term underground use.
Yes. It is commonly installed behind retaining walls to reduce water pressure and improve wall stability.
Flexible Permeable Pipe adapts better to uneven settlement and curved installation environments while maintaining stable drainage performance.
Yes. Customized diameter, filter layer thickness, and roll length are available according to engineering requirements.
Yes. We supply Flexible Permeable Pipe for infrastructure and civil engineering projects in multiple international markets.