What are the differences between composite manhole cover and common manhole cover?
1. Appearance: the appearance of composite manhole cover series products is beautiful, and the surface of manhole cover can be colored and designed according to the design requirements. Cast iron manhole cover series products are easy to rust, easy to be corroded, single color is not beautiful. The surface of cement manhole cover series is not smooth, so it is difficult to stain.
2. Weight: the weight of composite manhole cover series is light, about one third of that of cast iron and cement.
3. Toughness: composite manhole cover series products have good toughness and high strength. Different cast iron manhole covers made of composite materials have strong rigidity, lack of toughness and easy to fracture. Cement manhole cover series products have strong firmness, lack of toughness and rigidity, and are easy to crack.
4. Noise: the cover base of compound manhole cover series is tightly combined without bounce. Cast iron manhole cover series products are cast. The cover seat is not tightly combined, so it is easy to jump, swing, sound and shift when the vehicle is running. Cement manhole cover series products cover base is not closely combined, easy to bounce and damage when the vehicle is running.
5. Maintenance: the composite manhole cover series products are corrosion-resistant, light weight, colorable, good airtight, easy to identify and daily opening and maintenance, effectively reducing the maintenance labor costs and update costs. Cast iron manhole cover series products are heavy, easy to rust and corrosion, and easy to be stolen. The square composite manhole cover can be used in which places, which increases the maintenance difficulty and renewal cost. Cement manhole cover series products are heavy, which increases the maintenance difficulty.