What are the advantages of the various ductile iron manhole covers commonly found in all major cities? where? You may not know it, so let me briefly introduce it.
In our daily life, we can see manhole covers every few steps, and there are countless manhole covers on the road, but have you noticed that there are many types of these manhole covers, the commonly used manhole covers are mainly sewage treatment manhole covers, fire manhole covers , Green resin manhole covers, stainless steel manhole covers, cement manhole covers and so on. In some places, invisible manhole covers are used for aesthetics. Among these manhole covers, the most used and the strongest one is the manhole cover of ductile cast iron.
By comparing the chemical composition and physical property data of the two materials, the material of the ductile iron manhole cover has nothing to do with the tensile strength, elongation, yield strength and ultimate load pressure head, and the determination index of various materials is much higher than that of the conventional manhole cover. Much more reasonable than conventional manhole covers.
After the nodularized cast iron manhole cover is spheroidized, its strength is greatly increased, and it has become the most popular manhole cover for construction units.
According to the shape, there are mainly round manhole covers and square manhole covers. Usually, the round manhole cover is the most used, because the round shape is not easy to tilt during use, and pedestrians and vehicles can pass through it safely. The square ball mill cast iron manhole cover is uneven in stress area, which makes it easier to tilt and inconvenient to install. The round manhole cover is not easy to fall into the deep well.
The most important thing is that the round ductile cast iron manhole cover is the most cost-effective, and the largest area is achieved with the least material, the cost is greatly reduced, and its safety is guaranteed.
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