Composite manhole cover-ideal alternative to ductile manhole cover, why is composite manhole cover ideal for cast iron manhole cover?
First, let's look at the differences between composite materials and cast iron manhole covers:
1. Appearance: The appearance of composite manhole cover products is flat and beautiful, and can be colored according to design requirements .. Cast iron manhole cover products are susceptible to rust, corrosion and poor appearance.
2. Weight: The composite manhole cover series products are lightweight, about 1/3 of the similar products of cast iron manhole cover ..
3. Toughness: Compound manhole cover series products have good toughness and are not easy to crack .. Cast iron manhole cover series products are hard, lack of toughness and easy to crack.
4. Vehicle exercise: The composite manhole cover series product covers are tightly combined, and the balance is free of warping, popping and other phenomena. The cast iron manhole cover series products are not tightly combined with the cover seat, the vehicle is easy to bounce, and the noise is high.
Maintenance: The composite manhole cover series products are easy to identify and open daily maintenance due to their characteristics of corrosion resistance, light weight, colorability, and good sealing performance, which effectively reduces the maintenance labor costs and renewal expenses. Rust is corroded and easily lost, which increases the difficulty of maintenance and the cost of replacement.
Unit cost: The unit cost of the composite manhole cover products is less than 40% of the cast iron manhole cover products.
