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.
+86 18963570329
+86 18963570329
+86 18963570329
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◉ Product Description

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

SpecificationDescription
MaterialCarbon Graphite Composite
ShapeSquare (Other shapes available)
Load RatingEN124 A15 / B125 / C250 / D400
Locking MechanismOptional bolt or integrated twist-lock
ColorStandard black (custom colors available)
SurfaceAnti-slip texture, customizable patterns/logos
Standard Sizes300x300mm, 600x600mm, 900x900mm, or customized
Service LifeOver 30 years (under normal use)
CertificationISO9001, SGS, EN124

◉ Product Show


1745997479306154.jpgApplications

  • 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


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◉ Packaging And Transport


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  • Packaging: Palletized, shrink-wrapped or wooden crate

  • MOQ: 100 pcs

  • Delivery Time: 15–30 days based on quantity

  • Ports: Shenzhen / Guangzhou / Ningbo / Qingdao


◉ Factory Display

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If you have any questions or need assistance, please feel free to contact us. We are committed to providing you with excellent service and ensuring your satisfaction.

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