We're all familiar with manholes, and nowadays, ductile iron cast iron manholes are quite common, usually round in shape. So, here's the question: why are manholes always round? Can't they be any other shape? Let our professionals give you a detailed explanation.
Typically, under normal conditions, we commonly see circular covers on road surfaces. This is because circular manhole covers are more stable compared to square ones, less prone to tilting and becoming loose, thus providing better safety for pedestrians and vehicles.
The shape of the ductile iron manhole cover not only involves the issue of material utilization, but also depends on the size of the well opening. If a square manhole cover significantly larger than the well opening is to be installed, the material utilization and practical cost are clearly not as efficient as using a circular ductile iron manhole cover.
Since the square ductile iron manhole covers have been planned, it is clarified that they also have specific application scopes, such as for utility and cable wells. Square ductile iron manhole covers can better prevent the entry of rainwater and other liquids, thereby avoiding water damage to cables. The ductile iron manhole covers are our most frequently and long-term used covers. However, with the development in recent years and technological innovations, our newly developed ductile iron manhole covers have overcome the shortcomings of traditional covers and brought convenience, greatly facilitating our use. So, what are the superior performance features of the new ductile iron manhole covers we see? Let our Hebei Tincolor Building Materials Technology Co., Ltd. introduce them to you.
The reuse value is not significant; old gray cast iron manhole covers, with a high content of cast iron, have a valuable recycling potential, making them frequent targets for thieves. A complete cover can be smashed into pieces and sold to private collection stations, resulting in significant losses for the government. The new ductile iron anti-theft manhole covers, composed of several materials with more impurities, have low recycling and reuse value. This is an effective method to prevent theft.
Aesthetically pleasing; the new ductile iron anti-theft manhole covers are made from pig iron, coke, and balling agent from designated production plants, with the spheroidizing grade controlled between 1st and 2nd level. The appearance is finely detailed, and the color closely matches the asphalt surface, allowing the concrete manhole ring to be concealed. Ensuring flatness, the cover blends seamlessly with the road surface, achieving an integrated look that beautifies the city. In contrast, the outdated gray cast iron manhole covers have a dull color, rough appearance, and the concrete manhole ring must be exposed above the asphalt surface, resulting in a mismatched color and difficulty in controlling flatness. This makes integration with the road challenging and a hurdle in city beautification.
Third, Reasonable Pricing; The price of the new ductile iron防盗well covers is comparable to the price of the old gray cast iron well covers, depending on the specifications.
