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Important Ductile Iron Manhole Covers in the City

编辑:四川井盖厂家 时间:2019-11-01 Source: Unknown Editor: Sichuan Manhole Cover Manufacturer Time: 2019-11-01
In recent years, manhole covers have been stolen and stolen, and rainstorms have caused us injuries, and even incidents of loss of life have occurred. Why are manhole covers so easy to be stolen or washed away due to heavy rain? At the same time that these lives regret, should we also face the root cause of it? Small manhole covers, 1-meter round manhole covers, can be washed away by plane water. There are about two possibilities: one possibility, the product on the street The water is not flat water, but a torrent of torrents. Another possibility is that the quality of the manhole cover is substandard and the weight is not enough to be easily washed away. As for the quality of manhole covers, it is worthy of our in-depth study. Manhole covers are iron, or most of them are ductile iron manhole covers. Ductile iron manhole covers are a type of nodular cast iron products. Spherical graphite effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining higher strength than carbon steel. The quality of the nodular cast iron manhole cover is related to the safety of the public. It is recommended that protection measures be added during installation. Even if there is rain impact, there are still 2 iron nails or chains to firmly fix the manhole cover so that the manhole cover will not be washed away by water. And it hurts people in the past.
1. The ductile manhole cover is detailed with medium carbon steel for its high strength, high toughness, good sealing performance and strong corrosion resistance, which is more than 10 times that of gray iron material. This is the main reason why ductile iron manhole covers are commonly used on trunk roads.
2. Ductile iron manhole cover has strong earthquake resistance and corrosion resistance. In the water spray corrosion test, the amount of corrosion in the 90-day period was only one forty times that of the gray cast iron manhole cover, which was 1/10 of that of the gray ball manhole cover. The service life is 2 times that of composite manhole cover and cement manhole cover, and 5 times that of ordinary gray iron manhole cover.
3. Ductile iron manhole cover is more conducive to reducing the stress caused by vibration in terms of reducing the vibration ability. An important reason for choosing nodular cast iron manhole covers is low cost, higher application rate, low casting cost, and convenient transportation.