Since the development of ductile iron well cover in 1950s, it has been widely used because of its excellent properties. However, customers sometimes have doubts about gray cast iron, which is also a casting material, so they are unable to choose products. Here is a brief introduction of how to quickly distinguish the two.
1. You can tell the two from the knock. Due to the different shapes of the two cast iron manhole covers, the sound of ductile iron manhole cover is similar to that of steel, while the sound of gray iron manhole cover sounds very dull.
2. The two can be distinguished from the bearing capacity. Gray iron well cover is made by directly refining pig iron into molten iron. Nodular iron well cover is made by combining other metals and auxiliary materials. Its bearing capacity far exceeds that of gray iron well cover. It has passed the certification of market and relevant departments and occupies a more position in the market.
3. The two can be distinguished by the weight of the well cover. Because the ductile iron used in ductile iron well cover greatly enhances the toughness and bearing capacity with the help of other excellent metals and accessories, its weight will be lighter than that of gray iron well cover. Both of them also prove that "weight does not determine everything, light is not necessarily bad, heavy is also good". Everything must be purchased according to the actual needs of our customers, so as to ensure its low price and good value for money.
As the ductile iron well cover is often used in municipal engineering, it is related to its environment. For the convenience of everyone, the shape of the well cover should conform to the environment and be safe. There are vehicles and pedestrians on the manhole cover at any time. The main reason for using a round manhole cover is that the diameter and length of each round manhole cover are the same. Therefore, if the manhole cover is rolled up by passing vehicles, its diameter will be slightly wider than that of the lower wellhead no matter how it is rolled up, and the manhole cover will not fall into the wellhead. If a square is used, the diagonal of the square is obviously longer than the length of each side, so when the well cover is rolled up, it is easy to fall into the well along the diagonal direction of the wellhead, causing hidden dangers.
If the wellhead is round or obviously smaller than the well cover, the square well cover will not fall into the well. This involves the problem of using and saving materials to a large extent. The use of the wellhead depends on the size of the wellhead. If a square well cover with an area much larger than the wellhead is pressed on it, the utilization and practical value of the material is not as useful as the direct use of the round well cover, which not only saves the material of the well cover, but also ensures the safety of the wellhead.
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