Round nodular cast iron sewage manhole cover

Round nodular cast iron sewage manhole cover, mainly used for municipal road sewage pipe well coverage. The ductile cast iron used in the ductile cast iron manhole cover makes the manhole cover have good impact resistance and will not be crushed. Moreover, it also has the characteristics of acid and alkali resistance and corrosion resistance, and the sewage will not be corroded when it passes through, which enhances its service life. The well seat and the well cover of the ductile cast iron manhole cover are connected with high strength bolts, which is conducive to making the manhole cover completely open and flush with the ground, so as to facilitate personnel maintenance. In addition, this integrated design helps to prevent theft, reduce "urban black holes", and protect pedestrians and vehicles. The convex diamond pattern design on the surface of the round ductile cast iron manhole cover is beautiful and non-slip, and beautifies the urban environment on the basis of practicality. The…