The composite manhole cover has a long service life. SMC is a polymer composite material, mainly made of high-performance resin, glass fiber and mineral fillers and other reinforcing materials, which can ensure the penetration of resin in the glass fiber and greatly enhance the internal adhesion, so the product can be effectively Load. It has high fatigue strength and frequency under its action, and the service life is usually not less than 30 years.

The traditional ductile iron manhole covers will wear out over time, especially when it is raining and humid, which poses a serious safety risk to the car and two-wheeler. The structure produced by the composite round manhole cover is many times stronger than traditional metal materials, non-slip, light weight, safe and reliable.