This product is made of QT500-7 ductile cast iron material. It is precisely cast after ballizing and spheroidizing treatment. Its mechanical properties are stable, and its tensile strength, toughness and impact resistance are significantly superior to those of gray cast iron, meeting the requirements for long-term heavy-load use in municipal roads.
The product adopts a non-settlement structural design. The well ring is equipped with a widened flange support surface, which can effectively transfer the vehicle load to the pavement base, reducing the local stress around the well, and structurally inhibiting the settlement of the well cover, the damage of the well ring and the cracking of the pavement. The gap lock + elastic buffer structure between the well cover and the well ring is used, combined with the rubber sealing ring, to achieve anti-jump, anti-vibration, noise reduction and sealing functions, effectively reducing abnormal vehicle noise and the infiltration of rainwater, debris and other substances.
The product has safety features such as anti-theft, anti-slip and anti-fall. The surface has clear anti-slip patterns, and the bearing capacity complies with the requirements of GB/T 23858 standard. It can provide multiple load levels such as C250, D400 and E600. The overall anti-corrosion treatment ensures strong weather resistance and long service life, and is suitable for various inspection well systems in urban main roads, highways, parking lots, municipal pipelines and other places.
The spheroidal graphite cast iron round manhole cover is engineered for demanding municipal and infrastructure environments where strength, stability, and long service life are essential. Manufactured from high-quality ductile iron material, it delivers excellent mechanical performance and reliable load-bearing capacity for roadways, parking areas, and utility systems.
Its structural design focuses on safety, durability, and long-term stability under continuous traffic pressure, making it suitable for modern urban infrastructure projects.
The product is made from spheroidal graphite cast iron, which is formed through precise spheroidizing treatment. This advanced metallurgical process significantly improves the internal graphite structure, resulting in enhanced mechanical performance.
The material provides strong tensile strength and impact resistance, ensuring stable performance under heavy vehicle loads.
Compared with traditional gray cast iron, ductile iron offers better deformation resistance and reduces the risk of cracking under pressure.
The material composition and casting precision contribute to extended durability in outdoor and high-load environments.
The spheroidal graphite cast iron round manhole cover is designed with a focus on load distribution and road surface protection.
The frame includes a widened flange support surface that transfers vehicle loads directly to the road base. This reduces stress concentration around the manhole area and helps prevent pavement damage.
The non-settlement structure effectively minimizes sinking risks, ensuring the manhole cover remains level with the road surface over time.
A gap lock combined with an elastic buffer structure improves stability between the cover and frame. This design reduces vibration, prevents displacement, and enhances overall operational safety.
This manhole cover integrates multiple safety and performance functions to ensure reliable operation in public environments.
The surface features clearly defined anti-slip patterns, improving traction and reducing accident risks in wet or high-traffic conditions.
The structural design helps prevent unauthorized removal and enhances safety for pedestrians and vehicles.
The sealing system, combined with rubber components, effectively reduces noise caused by vehicle impact and minimizes vibration transmission.
The tight structural fit helps prevent rainwater, debris, and foreign materials from entering underground systems.
The product complies with GB/T 23858 standard requirements and is designed for various load classifications.
These options allow flexible application across different traffic environments, from light municipal roads to heavy-duty highways.
This product is widely used in multiple infrastructure environments, including:
Its structural stability and load adaptability make it suitable for both light-duty and heavy-duty applications.
| Item | Description |
|---|---|
| Product Name | Spheroidal graphite cast iron round manhole cover |
| Product Size | Can be customized according to customer requirements |
| In-Stock Sizes | 700mm × 900mm × 190mm 800mm × 1000mm × 190mm 900mm × 1100mm × 190mm |
| Packaging Dimension | Package according to the customer’s requirements, model and quantity |
| Weight | Different sizes, different weights. We will provide the weight based on the customer’s requirements for each model |
| Modes of Packing | Simple bundling / Tray packaging |
To ensure product safety during transportation, multiple packaging methods are available depending on order requirements:
Packaging can be customized according to order quantity, model type, and logistics requirements.
Designed for long-term load resistance and reduced maintenance needs.
Effectively reduces settlement, cracking, and structural damage around installation areas.
Combines anti-slip, anti-theft, and anti-vibration features for improved urban safety.
Durable material and stable structure reduce replacement frequency and lifecycle cost.
Get in touch with us for product inquiries, customized solutions, partnership opportunities, and professional support to help your projects succeed.
Multiple transportation options: road, sea, and air freight to meet diverse customer requirements.
High-load, corrosion-resistant, theft-proof, lightweight manhole covers, customizable.
Premium ductile iron and composite resin provide excellent load-bearing capacity.
Surface treatment and material selection ensure long-term durability.
Lightweight for easy transport and installation, reducing construction costs.
Available in multiple sizes and specifications to meet diverse project requirements.
