Key Features
- Custom Shapes: Profiles include egg, elliptical, arch, jaw-shaped, inverted-egg and other complex cross-sections to suit project needs.
- High Strength & Stiffness: Filament-wound GRP offers high bending stiffness (SN2500–SN10000) and tensile strength, enabling pipes to handle earth loads and flow pressures.
- Corrosion & Abrasion Resistance: Inert to sewage, stormwater, chemicals and abrasion from slurry flows.
- Smooth Interior: GRP’s glassy surface maximizes hydraulic flow (often increasing capacity compared to old pipelines).
- Lightweight Construction: Easy to transport and install in confined trenches or jacking operations.
- Flexible Jointing: Accepts rubber-ring joints (RRJ) or laminated butt joints for quick assembly.
- Longevity: Engineered for a 100+ year design life even under buried or submerged conditions.
Benefits
- Rehabilitation of Aged Infrastructure: Ideal for relining existing sewers and culverts with reduced excavation. The egg/arch shapes restore structural capacity to century-old conduits.
- Maximized Hydraulic Performance: Custom cross-sections often provide greater flow area than circular pipes in limited space.
- Reduced Installation Time and Cost: Light pipes and simple joint systems speed construction; no heavy machinery needed for lifting.
- Low Maintenance: No corrosion, so no need for coatings or cathodic protection; smooth interior resists fouling and scaling.
- Design Flexibility: Can be engineered to fit under railways, roads or buildings where height or width is constrained (e.g. low-profile arch shapes).
Applications
- Culverts & Stormwater Drains: Road and railway culverts (egg/arch profiles) handling highway runoff and drainage.
- Sewer & Wastewater Conduits: Non-circular profiles for gravity sewers in urban or confined environments.
- Trenchless Construction: Jacking/micro-tunneling installations for drainage or cable ducts where space is limited.
- Architectural & Landscape: Custom GRP channels or benches in parks, resorts or urban plazas (GRP’s corrosion resistance and aesthetics).
- Industrial Facilities: Flow channels, effluent return lines or process bins requiring special shapes.
Technical Specifications (Typical)
- Material: Filament-wound glass-fiber reinforced polyester (vinylester or epoxy as needed).
- Profiles: Egg, elongated egg, arch, rectangular (with rounded corners), inverted-Jaw, and custom shapes.
- Stiffness Class: Typically SN2500 to SN10000 (N/m²) to resist deflection.
- Joint System: Rubber ring joints (RRJ) or butt joints with lamination tape (no corrodible metal parts).
- Design Life: ≥100 years per ISO 9001 quality processes.
- Standard Lengths: 2–3 m pipes (up to 6 m lengths available), with matching shaped fittings and manholes.
Unique Selling Points (USPs)
- Fully Customizable Shapes: We deliver virtually any profile to match existing conduits or design specifications.
- Structural Rehabilitation Capability: The GRP lining becomes a permanent structural member, eliminating the need for concrete sleeves or linings.
- High Hydraulic Efficiency: Glass-smooth interior increases flow versus rough concrete or deformed pipes.
- Joint Integrity: Leak-free assembly with flexible gaskets ensures system watertightness and pipeline continuity.
- Expert Engineering Support: Our team provides hydraulic and structural analysis to optimize shapes and wall thickness for each project.