Nodular cast iron sewage manhole cover D400

Nodular cast iron sewage manhole cover is mainly used for urban sewage well cover, is one of the important materials for municipal construction sewage manhole cover. The raised dot design on the nodular cast iron sewage manhole cover increases the friction, reduces the risk of pedestrian falls and the possibility of vehicle slip, and protects the safety of vehicles and pedestrians. Ductile iron manhole cover has the advantages of high strength, corrosion resistance, wear resistance, etc., and is widely used in the field of urban construction.