Product Overview
The 400mm clear opening round manhole cover is manufactured from high-strength SMC composite material and designed for underground utility systems, municipal drainage networks, and infrastructure access applications. Available in EN124 C250 and D400 load classes for different traffic environments.
Key Benefits
High Load Capacity
- EN124 C250 and D400 load ratings suitable for pedestrian areas to heavy traffic roads
- D400 version withstands vehicle loads up to 40 tons for demanding environments
- C250 version ideal for parking lots, sidewalks, and residential zones
Durable Composite Material
- High-strength SMC composite provides corrosion and chemical resistance against fuels, oils, and salts
- Anti-static and flame-retardant properties for safety in sensitive installations
- Non-metal anti-theft design has no scrap value, deterring theft
Practical Design
- Waterproof sealing structure helps prevent leakage and water ingress into chambers
- Lightweight construction allows easy handling and quick installation without heavy equipment
- Complete set includes both cover and frame for ready-to-install convenience
Real Customer Feedback
We upgraded our municipal utility access points with these 400mm SMC covers. The installation crew appreciated the lightweight design — one person can handle each unit easily. After one year in service, no signs of rust or chemical degradation. The sealing gasket effectively keeps groundwater out. Excellent value compared to cast iron. – Sarah L., Civil Engineering Supervisor
Technical Specifications
- Clear Opening: 400mm
- Cover Size: 460mm
- Frame Size: 530mm
- Height: 60mm
- Material: SMC (Sheet Molding Compound) composite
- Load Classes: EN124 C250 and D400
- Features: Waterproof sealing, anti-static, flame-retardant, corrosion resistant
- Included Components: Cover and frame
Comparison Table
| Feature | 400mm SMC Manhole Cover | Traditional Cast Iron Cover | Standard Plastic Cover |
|---|---|---|---|
| Weight (approx.) | Lightweight | Heavy (35-50 kg) | Very lightweight |
| Corrosion Resistance | Excellent | Poor (rusts) | Good |
| Theft Risk | Low (non-metal) | High | Low |
| Load Capacity | C250 to D400 | D400 available | A15 to B125 only |
| Sealing | Integrated gasket | None | Optional |
FAQ
Can you provide OEM / ODM service?
Yes. OEM and ODM service are available. Custom logo, color, surface pattern, and dimensions can be produced according to project requirements.
What is your delivery time?
Normally, the production lead time is about 15–25 days depending on order quantity and product specifications.
What is the MOQ?
MOQ depends on the product size and specifications. Please contact us for detailed information.
What packaging method do you use?
The products are normally packed on export pallets for safer transportation and easier loading and unloading.
Do you provide warranty and after-sales service?
Yes. We provide one-year warranty service and technical support for our products. Please contact us for detailed after-sales information and project assistance.
Does the cover have waterproof sealing structure?
Yes. The cover is equipped with a sealing structure designed to help prevent leakage and water ingress.
Is this product suitable for heavy traffic areas?
Yes. The D400 version is suitable for heavy-duty traffic environments according to EN124 standards.
Is the material resistant to fuel and chemicals?
Yes. SMC composite material provides excellent corrosion and chemical resistance for underground fuel system applications.
Does the product include the frame?
Yes. The product includes both the manhole cover and frame.
