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Difference between Ductile Iron Well Cover and Gray Iron Well Cover
Source: clab66.cn Release time: 2023/10/13 17:43:55
Well covers are widely used. Many people can't tell the difference between ductile iron well covers and gray iron well covers. Here is an introduction.
Ductile iron manhole covers are more elegant.
The commonly used materials for the new type of nodular cast iron manhole covers are the best evaluated gray cast iron, coke and nodulizer gray cast iron grades of professional designated manufacturers, and the operation is within the range of 1-2 grades. The beautiful color of the surface is close to the whole surface, and the concrete well ring is not exposed. Under the standard of the flatness of the manhole, the manhole cover is integrated into the ground and the road is integrated to achieve the cleaning result.
However, due to the dark color of the well cover, the surface of the old gray cast iron well cover is not smooth. The concrete well ring shall expose the difference between the color of the drained overall surface and the drained overall surface. The flatness is difficult to control and the road integration is difficult.
Second, nodular cast iron manhole covers are more conducive to anti-theft
The old gray cast iron well cover has high iron content and high cost of re refining and utilization. Every time it becomes a tool frequented by thieves, a beautiful manhole cover will be broken into pieces and sold to private acquisition points. The government has suffered great losses. The new type of nodular cast iron anti-theft manhole cover is made of several materials and contains residues. Multiple production and processing, low cost of reuse. This is a way to prevent thieves from stealing.
Ductile iron manhole covers have high compressive strength.
The specification and model of nodular cast iron manhole cover are the same as those of gray cast iron manhole cover, and the material is also different.
Now, the organic chemical identity and technological properties of nodular cast iron and gray cast iron are compared. By comparing the above organic chemical identity and process performance data information, we can get the key index values of nodular cast iron. Whether the compressive strength, tensile strength, yield strength or ultimate load tension, they are far beyond the control of gray cast iron. The data information of many organic chemical identities is much fairer than that of gray cast iron.
More scientific research on nodular cast iron manhole cover
The new nodular cast iron anti-theft manhole cover is padded with a polyisopropyl titanate ether pad on the surface of the frame, which widens the depth acceptance of the frame and the cover, making the frame high-precision and using buttons together. Tighten the bolts and anti-theft equipment, fundamentally clean the sound, replace the vibration, and avoid the noise problem caused by the old gray cast iron manhole cover when it is severely hit by the vehicle and the signs caused by the serious hit of the vehicle.
