Do you know the difference between composite well cover, cement well cover and nodular cast iron well cover? Next, Shandong nodular cast iron manhole cover will give you a detailed description.
The cement well cover and the cement well cover are used in many places。 They are mostly used in residential areas and not very significant occasions。 The advantages of the cement well cover are very significant, low cost, automatic anti-theft, not easy to lose, and the cement well cover is generally thick and anti-theft。 The defect is that the cement well cover is relatively bulky, relatively difficult to open, with limited bearing capacity, and simple cracking and angle dropping after heavy vehicle rolling。 Some well covers are intact。 They will be broken when they are opened。 The sewer is blocked。 Most of them are caused by the broken cement well covers falling into the well。 Therefore, the cement well covers are not suitable for roads and inspection wells that often need to be opened。
2. Composite well covers are made of non-metallic materials and supported by steel bars or bamboo strips in the center. Generally, there are polymer materials, glass fiber materials and resin materials. The composite well covers have bright colors, automatic anti-theft ratio and features, and are used more and more widely. The defects are small bearing capacity and poor corrosion resistance. The "bamboo strip well cover" and "brittle cover" exposed on the network refer to this kind of well cover. The high temperature in summer and the low temperature in winter make the composite well cover age quickly, and some chemical agents for snow removal are the natural enemies of the composite well cover. Therefore, the composite well cover is not suitable for the use in the cold area in the north, not to mention on the road of large motor vehicles. In addition, due to its light weight and lack of connection, the composite well cover is simply washed away by water in heavy rain days, resulting in pedestrian falling into the wellhead, causing casualties.
3. Nodular cast iron manhole covers have better rigidity, and hinge links are selected for anti-theft type. Compared with other two kinds of manhole covers, the cost is slightly higher. However, in some important high load occasions, such as urban expressway and urban backbone road, nodular cast iron manhole covers are mostly used. Because of the hinge link, the ductile iron manhole cover will not be displaced or washed away in heavy rain, which can be said to be more safe and useful. At present, the developed countries generally only choose the ductile iron manhole cover. The first tier cities such as Beijing, Shanghai, Guangdong, Shenyang, Changchun and Tianjin also choose the ductile iron manhole cover. The defect of this kind of well cover is that it is a little expensive.
The above is about the characteristics of composite well cover and ductile iron well cover, provided by Shandong ductile iron well cover finishing, want to know more welcome to consult http://www.zgcjxdw.com Website.