Product Overview
D400 ductile iron manhole cover is designed for road drainage, municipal utility access, parking areas, and infrastructure projects where reliable load-bearing performance is required. This round manhole cover features a matching frame and hinged structure for safe access, stable seating, and long-term outdoor durability.
The D400 load class is commonly selected for areas exposed to regular vehicle traffic, such as roadways, road shoulders, commercial access roads, parking areas, and municipal drainage points. Compared with light-duty covers, this product is designed to provide stronger impact resistance, better outdoor performance, and more stable use in demanding infrastructure environments.
Product Application / Project Use
This D400 ductile iron manhole cover is suitable for municipal drainage systems, road utility access points, stormwater systems, inspection chambers, parking areas, commercial streets, and infrastructure maintenance projects.
The round cover design helps distribute load evenly, while the hinged structure keeps the cover connected to the frame during opening and closing. This can make maintenance access safer and reduce the risk of misplaced covers during inspection or repair work.
Specification Table
| Item | Specification |
|---|---|
| Product Name | D400 Round Ductile Iron Manhole Cover |
| Material | Ductile Iron |
| Shape | Round |
| Load Class | D400 |
| Design | Hinged cover with matching frame |
| Surface Design | Anti-slip surface pattern |
| Frame Option | Cover and frame set |
| Size | Custom size available according to drawings or project requirements |
| Surface Treatment | Black bitumen coating, painting, epoxy coating, or custom coating |
| Applications | Road drainage, municipal utility access, parking areas, inspection chambers, infrastructure projects |
| Customization | Size, logo, marking, locking design, frame type, coating, packaging |
| Packaging | Pallet, wooden case, or export-ready packaging |
| Order Type | Project order / bulk order / OEM customization |
Customization Options
Available customization options include cover size, frame type, logo, marking, surface pattern, locking design, hinge structure, coating, and export packaging. Buyers can provide drawings, samples, chamber dimensions, or project specifications for review.
Common Applications
- Municipal road drainage systems
- Road utility access points
- Stormwater drainage projects
- Parking areas
- Commercial streets
- Inspection chambers
- Infrastructure maintenance projects
- Urban construction and renovation projects
Packaging and Export
For export orders, D400 round ductile iron manhole covers can be packed with pallets, wooden cases, or other export-ready packaging methods. Proper packaging helps protect the cover, frame, hinge area, surface coating, and heavy casting structure during loading, shipping, and unloading.
Related Products and Categories
For rectangular road drainage applications, you may also view our D400 manhole cover with frame and rectangular ductile iron manhole cover.
More options are available in our ductile iron manhole covers category and drainage covers category.
Where D400 Ductile Iron Manhole Covers Are Used
A D400 ductile iron manhole cover is typically used in areas where road traffic, repeated vehicle loading and long-term access stability are important. Common applications include public roads, carriageways, highway shoulders, industrial yards, loading areas, municipal road drainage systems and utility access chambers.
For overseas road and infrastructure projects, D400 is often selected when the cover may be exposed to heavy vehicles, service trucks, emergency vehicles or regular traffic movement. The installation environment should always be checked before selecting the final load class.
Why Ductile Iron Is Suitable for D400 Load Class
Ductile iron is widely used for D400 manhole covers because it provides better toughness, impact resistance and structural reliability than ordinary grey cast iron. For road drainage and municipal access points, the cover and frame must withstand not only static load, but also dynamic loading from moving vehicles.
A well-designed D400 ductile iron manhole cover should provide stable seating, good frame fit and reliable performance under repeated traffic conditions. Surface pattern, coating, frame depth and installation quality all affect long-term service performance.
Buyer Checklist Before Ordering D400 Manhole Covers
Before confirming an order, buyers should check the main technical details to make sure the product is suitable for the project site and installation environment.
- Clear opening size
- Overall frame size
- Required load class, such as EN124 D400
- Installation area, such as road, kerbside, utility access or industrial site
- Cover shape and frame design
- Surface anti-slip pattern
- Coating requirement
- Locking or hinge option if required
- Quantity and delivery schedule
- Destination port and packaging requirement
If you are comparing different load classes for your project, you can also read our EN124 manhole cover load classes guide or our C250 vs D400 manhole cover comparison article.
FAQ About D400 Ductile Iron Manhole Covers
What is a D400 ductile iron manhole cover used for?
A D400 ductile iron manhole cover is commonly used for public roads, carriageways, road drainage systems, utility access chambers, industrial yards and areas where vehicle traffic may pass over the cover.
What is the load capacity of a D400 manhole cover?
Under EN124 classification, D400 refers to a 400 kN test load class. It is typically selected for carriageways and areas used by road vehicles. The actual suitability still depends on frame design, material quality, installation condition and project specification.
Can D400 manhole covers be used on public roads?
Yes. D400 manhole covers are commonly used on public roads and carriageways where the installation area is exposed to vehicle traffic. Buyers should confirm the required standard, clear opening, frame size and installation environment before ordering.
What should buyers confirm before ordering D400 manhole covers?
Buyers should confirm clear opening size, frame size, load class, material, surface pattern, coating, locking or hinge requirement, quantity, packaging method and destination port. If project drawings or samples are available, they should be shared before quotation.
Quick Selection Checklist for D400 Manhole Covers
Before ordering a D400 ductile iron manhole cover, buyers should confirm the main project requirements clearly.
- Load class: D400 for heavy-duty road and traffic areas
- Clear opening size and frame outer dimensions
- Round or rectangular cover shape
- Frame depth and installation condition
- Material grade and surface treatment
- Required documents, such as drawings or test reports
This checklist helps reduce specification mistakes and makes quotation communication faster.
FAQ
Q1: What is a D400 ductile iron manhole cover used for?
A D400 ductile iron manhole cover is commonly used for road drainage, municipal utility access, inspection chambers, parking areas, and infrastructure projects exposed to regular vehicle traffic.
Q2: What does D400 mean for this manhole cover?
D400 refers to a load class commonly selected for areas where vehicles may pass, such as roadways, parking areas, road shoulders, and municipal access points. The final selection should be based on project requirements and traffic conditions.
Q3: Can this round manhole cover be supplied with a frame?
Yes. This product can be supplied as a cover-and-frame set to support stable installation, proper seating, and long-term outdoor use.
Q4: What is the advantage of the hinged design?
The hinged design keeps the cover connected to the frame during opening and closing. This can make maintenance access easier and help reduce the risk of misplaced covers on site.
Q5: Can the size, logo, or marking be customized?
Yes. Size, logo, marking, locking design, surface pattern, frame type, coating, and packaging can be customized according to drawings or project specifications.
Q6: What surface treatments are available?
Common surface treatments include black bitumen coating, painting, epoxy coating, and custom coating options depending on the project environment and buyer requirements.
Q7: What information should buyers provide for a D400 round manhole cover quotation?
For a D400 round manhole cover quotation, buyers should provide the required load class, cover diameter, clear opening size, quantity, project drawings, and applicable standard. These details help confirm the round cover size, suitability of the load class, installation fit, and production requirements.
Buyers should also share the installation area, expected traffic conditions, local project requirements, or destination market requirements. For D400 projects, typical applications may include carriageways, road lanes, road shoulders, municipal utility access points, road drainage access points, parking areas with regular vehicle loading, industrial parks, and other heavy-traffic locations.
If the round cover will be installed on an existing frame, buyers should provide photos or drawings of the manhole opening, existing frame dimensions, frame condition, seating surface, and clear opening size when possible. This helps confirm whether the existing frame can properly match the new D400 ductile iron round manhole cover.
If the project requires a hinged design, locking system, anti-theft design, custom logo, surface marking, anti-slip pattern, drainage holes, or special coating, these requirements should be confirmed before quotation or production. Clear project information helps recommend a suitable D400 round manhole cover while reducing the risk of wrong cover selection, poor seating, size mismatch, or installation delays.
Q8: Should buyers order a D400 round manhole cover only or a cover with frame?
A D400 round manhole cover only may be suitable when the existing frame is structurally sound, correctly sized, has a stable seating surface, and is still suitable for the required D400 load class. In this case, buyers should confirm the cover diameter, clear opening size, existing frame dimensions, frame condition, seating surface, and expected traffic load before ordering.
A complete D400 manhole cover with frame is recommended for new installation, replacement work, damaged frames, mismatched frames, corroded frames, poor seating, or heavy-traffic projects where stable installation is important. The matching frame can help improve seating, load distribution, traffic stability, and long-term service performance.
If the existing frame condition is uncertain, buyers should provide photos or drawings of the manhole opening and frame before ordering. This helps determine whether a cover-only replacement is suitable or whether a complete D400 cover and frame set should be used for more stable installation, better fit, and long-term performance.
Request a Quote
Need a D400 ductile iron manhole cover for your road drainage, utility access, or municipal infrastructure project? Send us your drawing, size, quantity, load requirement, frame requirement, surface treatment, and destination port. Our team can help review the specification and provide a suitable quotation.
