Product Overview
The 600mm round SMC composite manhole cover is one of the most widely used sizes for underground utility access and drainage systems. Manufactured from fiberglass reinforced SMC composite material, it offers excellent corrosion resistance, low maintenance requirements and a lighter weight compared with traditional cast iron covers. This series features a 180° hinged cover with an anti-theft locking system, providing secure access while helping prevent cover displacement during inspection and maintenance work.
Product Drawing

Key Features
- 180° hinged cover – the cover remains attached to the frame when opened, reducing handling during routine inspection and maintenance
- Anti-theft locking system – equipped with a built-in lock to help prevent unauthorized opening and improve site security
- Available in C250 and D400 load classes – suitable for both roadside installations and areas exposed to regular vehicle traffic
- Corrosion resistant composite material – SMC composite will not rust and performs reliably in wet and outdoor environments
- Lightweight construction – easier to transport and install than traditional cast iron alternatives
- Custom logo available – surface logos and identification markings can be customized according to project requirements
Specifications & Dimensions
| Load Class | Clear Opening | Cover Size | Frame Size | Overall Height | Cover Thickness | Weight |
|---|---|---|---|---|---|---|
| C250 | 600mm | 690mm | 805mm | 100mm | 50mm | 46kg |
| D400 | 600mm | 690mm | 805mm | 100mm | 50mm | 53kg |
Technical Specifications:
- Material: SMC Composite
- Clear Opening: 600mm
- Standard: EN124
- Shape: Round
- Cover Type: 180° Hinged Cover
- Locking System: Anti-Theft Lock
Applications
- Utility inspection chambers
- Road drainage systems
- Municipal infrastructure projects
- Commercial parking areas
- Residential road networks
- Underground cable and pipeline access points
FAQ
What is the advantage of a 180° hinged cover?
The 180° hinged cover remains attached to the frame when opened, preventing the cover from being displaced or lost during inspection and maintenance work.
Can you provide OEM / ODM service?
Yes. OEM and ODM services 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.















