The classification standard of nodular cast iron manhole covers is because the steel is recyclable at first, and the quality of steel is very heavy. For recycled materials, people have to weigh the weight of price conversion. Therefore, it is very important for the anti-theft work of urban road manhole covers. Please consider that if our urban road manhole covers are covered, if you steal them all, There will be big holes in the road. Pedestrian travel is very dangerous. If you are not careful, it is easy to fall.

When making ductile iron manhole cover, it is made by high temperature forming method, which has the function of natural anti-theft. Its corrosion resistance and aging resistance are very good. It will not deform and deteriorate for a long time, and its stability is very good. Ductile iron manhole covers are supported by steel, even when subjected to destructive loads

It is not powdery broken, and has performance indexes such as anti denaturation and bearing capacity. Through the inspection of the quality supervision and inspection base of the construction project, it greatly facilitates the installation and protection, and even produces commodities of various standards and colors in terms of management according to customer requirements, and beautifies the city.

The market sales of nodular cast iron manhole cover is very good, because the products produced by nodular cast iron manhole cover manufacturers are made of nodular cast iron, which has strong anti-theft performance and strong corrosion resistance. It has anti-theft function in actual use.