Your Professional Iron Manhole Covers Supplier
With over 30 years of nail manufacturing experience, Linyi Power Metal Products Co., Ltd specializes in producing Common Wire Nails, Concrete Steel Nails, Roofing Nails, IBR Nails, Shoe Tacks, and Ring Shank Nails for global markets. From raw material wire selection to final packaging, every step is strictly controlled to ensure consistent quality and on-time delivery.
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![Cast Iron Manhole Covers]()
Cast Iron Manhole CoversCast Iron Manhole Covers are widely used in drainage systems, roads, and municipal infrastructure. Made from durable cast iron, they offer strong load capacity, long service life, and reliable protection for underground utilities....view more
Why choose us
Decades of Manufacturing Experience
We are able to precisely control raw material selection, nail body dimensional accuracy, surface treatment processes, and packaging standards.
Custom Packaging & Private Label
Support personalized packaging, including printed cartons, color boxes, woven bags, and logo branding to strengthen your market identity.
Our Main Markets
POWER supplies high-quality nails to distributors, wholesalers, hardware importers, and construction suppliers around the world. Our main export markets include Africa, the Middle East, Southeast Asia, South America, and Eastern Europe.
Specifications
| Product Name | Cast Iron Manhole Cover | Surface Treatment | Bitumen Coating / Epoxy Coating |
| Material | Grey Cast Iron / Ductile Iron | Frame | Available with frame |
| Shape | Round / Square | Color | Black / Custom |
| Size | 300mm – 1000mm (custom sizes available) | Application | Road, Drainage, Sewer System |
| Standard | EN124 / ISO Standard | Packaging | Pallet or Wooden Pallet |
| Load Class | A15 / B125 / C250 / D400 |
Features
Exceptional Strength and Durability
Made from ductile iron (EN124 D400), the cover offers high tensile strength (≥400 MPa) and excellent ductility, enabling it to withstand heavy loads. It is suitable for D400-class applications, including traffic areas used by heavy vehicles such as trucks and buses.
The double-layer design enhances structural integrity, reducing the risk of deformation, cracking, or breakage even under repeated stress.
Superior Anti-Theft Features
The double-layer structure often incorporates integrated locking mechanisms, such as hidden bolts, keyed locks, or anti-pry designs, making unauthorized removal extremely difficult.
The heavy weight and solid construction of ductile iron also serve as natural deterrents against theft.
Compliance with International Standards
The product complies with EN124, the European standard for street furniture, ensuring consistent load-bearing capacity, dimensional accuracy, and public safety performance.
Corrosion Resistance and Long Service Life
Ductile iron can be treated with anti-corrosion coatings, such as galvanization or epoxy paint, to withstand harsh environmental conditions including moisture, chemicals, and salt exposure.
Its corrosion resistance minimizes maintenance requirements and helps reduce long-term replacement and repair costs.
Precision Engineering and Secure Fit
The frame is engineered to ensure tight and secure alignment with the cover, minimizing gaps that could cause noise, vibration, or potential safety hazards.
Accurate dimensions ensure compatibility with standard infrastructure systems, simplifying installation and replacement.
Versatility in Design
Available in various surface finishes, including plain, gritted, and grooved patterns, to improve slip resistance and overall appearance.
The covers can also be customized with logos, drainage holes, or specific load ratings according to project requirements.
Mechanical Composition
| Mechanical Property | Value |
| Tensile Strength | 150-250 MPa |
| Compressive Strength | 300-500 MPa |
| Flexural Strength | 10-20 MPa |
| Impact Resistance | High |
| Fatigue Resistance | Superior |
| Abrasion Resistance | Excellent |
Chemical Composition
Chemical compositions are instrumental in making the cast iron suitable for various applications in manhole coverings that meet the demands of the environment. The typical chemical composition is as follows:
| Element | Percentage Composition |
| Carbon (C) | 3.0% - 3.6% |
| Silicon (Si) | 1.8% - 2.8% |
| Manganese (Mn) | 0.3% - 0.9% |
| Sulfur (S) | ≤ 0.15% |
| Phosphorus (P) | ≤ 0.12% |
| Iron (Fe) | Balance |
| Materials | • Ductile Iron (EN-GJS-500-7, 400-15 / ASTM 65-45-12) • Grey Cast Iron (EN-GJL-200, 250 / ASTM Class 30/35) • Special High-Toughness Alloy Casting • Corrosion-Resistant Iron Grades |
| Surface Treatment | • Black Bituminous Paint (Standard Rust Protection) • Industrial Epoxy Powder Coating (Custom Colors) • Hot-Dip Galvanizing for extreme environments • Anti-slip Diamond/Square surface patterning • Zinc Plating for fasteners and hinges |
Certifications
FAQ
As one of the leading iron manhole covers manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy cheap iron manhole covers made in China here from our factory. For price consultation, contact us.
Ductile Iron Manhole Cover, 40 Round Manhole Cover, Cast Iron Manhole Covers
