① SMC manhole covers have smooth and beautiful appearance, with many optional colours and the cover surface is designed to be anti-skid and with delicate patterns and lines.
② The weight of SMC composite manhole cover can be 1/3 as the ductile iron or cast iron manhole covers or cement manhole cover with same opening size. It's very easy for one man to operate it and more convenient for daily inspection and maintenance and reduce the risk of labor injury.
③ SMC composite material is anti-corrosion and anti-aging, resistant to any harsh weather conditions. Comparing with metal, it has remarkable insulation and dielectric performance. Also, composite material is non-rusty, no scrap value to avoid vandalism.
④ With high fatigue strength, under the action of a given effective load and frequency, its service life is usually more than 30 years.
⑤ Environmental-friendly. SMC material is halogen-free and non-toxic.