Distinguishing various types of manhole covers. Identifying characteristics

The article provided a detailed presentation on **distinguishing between popular manhole cover types** today, especially those based on material and design. Below is the main summary of the article:

I. Classification of manhole covers by material

1. Ductile Iron Manhole Cover: Made from ductile iron, offering high bending strength and durability. This type of cover is popular because it can be used in many different environments but has a higher production cost.
2. Gray Iron Manhole Cover: Made from gray iron, hard but easily cracks when subjected to large bending forces. It is cheaper but difficult to machine, making it less common than ductile iron.
3. Steel Manhole Cover: Widely used on roadways for drainage purposes. Steel offers good durability and load-bearing capacity but is susceptible to rust.
4. Concrete Manhole Cover: Low cost and easy to produce, often used on sidewalks but has low load-bearing capacity.
5. Composite Manhole Cover: This type of cover is increasingly popular due to its light weight, reasonable cost, and ease of installation.

II. Classification of manhole covers by design

1. Round Frame Round Lid Manhole Cover: Commonly used in projects with various materials such as cast iron and composite.
2. Square Frame Square Lid Manhole Cover: Similar characteristics to the round lid but both the frame and the lid are square.
3. Recessed Square Frame Round Lid Manhole Cover: Square frame but the cover lid is round, suitable for locations where the manhole height is lower than the road surface.
4. Above-Ground Square Frame Round Lid Manhole Cover: Square frame and round lid are on the same plane, often used for manholes that are not too deep relative to the road surface.

Conclusion

Through this article, you can distinguish between different types of manhole covers based on material and design. Each type of manhole cover has its own application depending on the environment and project requirements.

Contact to order: If you have a need for manhole cover products, please contact via **Hotline/Zalo: 0936 629 323** for detailed consultation and to receive a discounted quote.