Circular manhole covers are an essential component in every city's infrastructure. These covers serve as access points to underground utility systems such as drainage, water, sewer, and electrical lines. They also provide a safe and secure cover over holes and trenches on roads, sidewalks, or other public areas...
Designed and manufactured according to EN124
Load capacity: D400 E600 F900
Material: Ductile iron GGG500 / Grey iron HT200
Coating: Bitumen coating (Epoxy coating available)
Most of the standard sizes are available.
Thanks to its unique geometric structure, the circular manhole cover has become the most widely used type of manhole cover worldwide, with its core advantages reflected in the following aspects:
Anti-fall Safety: No matter how the circular manhole cover rotates, it will not fall through the manhole opening; the diameter of a circle is constant, while a square manhole cover may fall through along the diagonal if tilted. This design fundamentally eliminates the risk of falling caused by improper installation or accidents, making it particularly suitable for crowded municipal roads, residential areas, and industrial zones.
Uniform Force Distribution: The circular design of the structure effectively distributes external pressure, such as that from vehicle movement and pedestrian traffic, across the entire manhole cover and its frame. This helps to minimize localized stress concentrations, prolongs the lifespan of the cover, and makes it better suited for road sections that experience frequent heavy vehicle use.
Convenient Installation and Maintenance: Installation does not require precise alignment; you can simply place it in position. For routine maintenance, it can be easily rotated and moved by a single person, which saves on labor costs and enhances work efficiency.
Our circular manhole covers are produced in strict accordance with national and industry standards, fully meeting various needs:
Specification and Size: The diameter ranges from 300mm to 1200mm, suitable for municipal pipelines of different well diameters, industrial inspection wells, and residential area sewers. Special sizes can be customized according to actual needs.
Ductile Iron: High strength, high toughness, excellent impact resistance, wear resistance, and corrosion resistance. It is suitable for heavy-load scenarios such as main roads with heavy traffic and industrial zones, with a service life of more than 20 years.
Composite Resin: Made of glass fiber reinforced materials, it is lightweight, has good insulation, is corrosion-resistant, and anti-theft. It is suitable for light-load scenarios such as sidewalks, green belts, residential areas, and weak current wells.
Stainless Steel:Beautiful in appearance and highly corrosion-resistant, it is suitable for places with high environmental requirements (such as food factories, hospitals, and landscape areas), but the cost is relatively high.
Additional Functions: Customizable anti-slip patterns, anti-theft locks, sealing strips (to prevent rainwater and debris from infiltrating into the well), and identification printing.
Quality Assurance: All manhole covers undergo rigorous testing for pressure resistance, impact resistance, and corrosion resistance. The materials used meet national standards, ensuring that potential safety hazards are eliminated.
Customization Service: We offer customized products tailored to specific sizes, materials, load ratings, and additional functions based on customer requirements. This approach allows us to meet the needs of special usage scenarios.
After-sales Support: We provide installation guidance to ensure a precise match between the manhole cover and the frame. If any quality issues arise that are not due to human damage, we offer free repair or replacement services.
Although the circular manhole cover is a basic product, it bears the important responsibility of ensuring public safety. We always adhere to the principle of "safety first, durability as the foundation" to provide customers with cost-effective solutions. For more product details or selection suggestions, please feel free to contact us, and we will be dedicated to serving you.
Product Dimensions
| Product Name | Circular Manhole Cover |
| Material | Ductile Iron GGG500-7 / 450-10 |
| Color | Black, as your request |
| Class | A15, B125, C250, D400, E600, F900 |
| Standard | EN124 |
| Shape | Round type |
| Design | a) Major standards designs available |
| b) As per customers' drawings or samples | |
| Process | a) Molding boards |
| b) Mechanical production line | |
| Coating | a) Cold applied black bitumen |
| b) Without coating | |
| c) Coating as per customers' requirement | |
| Package | Wooden pallets or steel pallets or As per customers' requirements |
| Inspection | Foundry in-house: Third party inspection available upon request |
| Application | Urban drainage system, Municipal Engineering |
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