Square Carbon Graphite Lockable Anti-Theft Manhole Cover
Lightweight and High Strength – Easier handling with excellent load-bearing performance.
Anti-Theft Design – Integrated lock prevents unauthorized access and theft.
Corrosion and Rust Resistant – Durable in harsh environments, no rust over time.
Non-Conductive and Fire Resistant – Safe for electrical and high-heat areas.
Customizable Sizes and Logos – Adaptable to specific project needs.
Noise Reduction Structure – Eliminates rattle and reduces traffic noise.
Long Lifespan with Low Maintenance – Cost-effective over time due to durability.
Product Overview
The Square Carbon Graphite Manhole Cover is an innovative alternative to traditional cast iron or steel covers. Engineered with cutting-edge composite technology, this manhole cover is lightweight yet strong, non-conductive, anti-corrosive, and ideal for high-traffic areas, telecom channels, drainage systems, and smart city projects. It comes with a built-in locking system to prevent unauthorized access and theft, meeting the safety and security requirements of modern infrastructure.
Key Features & Benefits
High Strength, Low Weight
Up to 60% lighter than ductile iron, yet capable of handling heavy loads (A15 to D400 rated). Easier and safer to install and remove without machinery.
Integrated Locking Mechanism
Tamper-proof design with optional bolt locks prevents unauthorized access and deters theft—ideal for public and high-security environments.
Corrosion & Weather Resistant
Immune to water, salt, acid, base, UV, and chemical exposure. Maintains performance and appearance over years without rust or degradation.
Non-Conductive, Non-Magnetic
Safe for use around electrical and telecom installations. Prevents interference and eliminates grounding risks.
Silent Operation
Precisely molded with anti-rattle features—minimizes noise even under heavy vehicle traffic.
Custom Branding & Designs
Surface, size, color, and logo can be fully customized to suit your project or municipal specifications.
Sustainable & Recyclable
Manufactured with environmentally friendly materials. Supports green building certifications and sustainable infrastructure programs.
Technical Specifications
| Specification | Description |
|---|---|
| Material | Carbon Graphite Composite |
| Shape | Square (Other shapes available) |
| Load Rating | EN124 A15 / B125 / C250 / D400 |
| Locking Mechanism | Optional bolt or integrated twist-lock |
| Color | Standard black (custom colors available) |
| Surface | Anti-slip texture, customizable patterns/logos |
| Standard Sizes | 300x300mm, 600x600mm, 900x900mm, or customized |
| Service Life | Over 30 years (under normal use) |
| Certification | ISO9001, SGS, EN124 |
Applications
Telecommunications Channels
Stormwater Drainage
Sewage Systems
Utility Boxes
Roadside Maintenance Access
Electric & Water Meter Boxes
Industrial Facilities
Why Choose Our Manhole Covers?
20+ years of OEM/ODM experience in infrastructure products
In-house R&D and tooling for complete customization
Fast lead time and global shipping
Factory-direct pricing with quality guarantee
Trusted by governments, utilities, and engineering firms worldwide
Packaging & Delivery
Packaging: Palletized, shrink-wrapped or wooden crate
MOQ: 100 pcs
Delivery Time: 15–30 days based on quantity
Ports: Shenzhen / Guangzhou / Ningbo / Qingdao
Contact Us for Free Samples or Custom Orders
If you're looking for a safe, lightweight, and reliable manhole solution, our Graphite Composite Manhole Covers are your best choice. Get in touch for pricing, samples, and technical drawings.
