Key Features
- Chemical-Resistant Material: Polypropylene/PVC won’t corrode in sewage, chemicals, or salt environments.
- UV-Stable: Unlike untreated plastics, engineered grades resist UV degradation for long-term outdoor use.
- Variety of Ratings: Available from Class A (pedestrian) up to Class C (light vehicle) per load standards.
- Sealed Design: Often gasketed or water-tight for utility vaults.
- Color and Marking: Can be molded in colors or with imprinted labels (e.g. “CABLE” or symbols).
Benefits
- Easy Handling: Up to 80% lighter than cast iron, reducing risk of injury and simplifying maintenance.
- No Theft Risk: Plastic covers have no scrap metal value.
- Corrosion-Proof: Suitable for chemical plants and coastal areas without rusting.
- Cost-Effective: Lower material and installation costs for moderate load applications.
Applications
- Utility Access: Cable chambers, telecom pits, stormwater inlets, drainage sump covers.
- Landscape & Architecture: Decorative access covers for fountains or gardens.
- Industrial Flooring: Maintenance holes in factories (e.g. chemical processing plants).
Technical Specifications
- Material: UV-stabilized PP or PVC (often glass- or mineral-filled for strength).
- Load Rating: NEMA/BS EN load classes A, B, C; some designs to H20 (16 tons) in PP composites.
- Standards: Must meet EN 124 (Europe) or ANSI/ASTM F 478 (USA) for manhole covers.
Unique Selling Points (USPs)
- Superior Weather Resistance: Engineered plastics resist moisture and sunlight.
- Lightweight Strength: Innovative composite grades (e.g. PVC with fillers) achieve high strength without weight.