Ductile iron manhole covers are used to cover roads or deep well dwellings to prevent people or objects from falling. According to the material, it can be divided into metal ductile iron manhole cover, high-strength fiber cement concrete ductile iron manhole cover, resin ductile iron manhole cover, etc. General. It can be used in Greenbelt, sidewalk, motorway, wharf, Hutong, etc.
Jinggai culture has been popular since the 1960s。 Some cities in the United States, France, Germany, Poland, Finland, South Korea, Japan, Norway, Brazil, Canada and so on have their own unique well cover culture。 Many famous historical and cultural cities in foreign countries have promoted Jinggai culture to the height of city name card。 In recent years, ductile iron manhole cover culture has also appeared in some areas of China。 A good ductile iron manhole cover culture can not only beautify the urban environment, but also reduce the occurrence of accidents。
1。 Why is the ductile iron manhole cover of the central sewer designed to be round?
A: Square / rectangular ductile iron manhole covers are easier to fall off。
Advantages of roundness:
First, the force is good;
Second, it is beautiful;
Third, the cost is low, and the square with the same diameter and length uses more wood
Fourth, the manhole cover of nodular cast iron is for down well maintenance, etc., and the round hole is more convenient for down well personnel
1。 High strength: it has the characteristics of high pressure resistance, bending resistance, impact resistance and good toughness。 After long-term use, the product will not crush and damage the ductile iron manhole cover, which can completely eliminate the "city black hole" accident。
2. Beautiful appearance: check the surface pattern design of the nodular cast iron manhole cover, the color is bright and adjustable, and beautify the urban environment.
3. Convenient use and light weight: the weight of the product is only about one third of that of cast iron, which is convenient for transportation, installation and maintenance, and greatly reduces the labor intensity.
4。 Safety: check that the ductile iron manhole cover is of no recycling value and natural safety; according to the needs of customers, adopt the locking structure to achieve good property safety。
5. 耐候性好:通过科学配方、先进技术、完善的技术设备，检测球墨铸铁人孔盖，使产品能在-50℃~ +300℃环境下正常使用。
5。 Good weather resistance: through scientific formula, advanced technology and perfect technical equipment, the manhole cover of nodular cast iron is tested, so that the product can be used normally in the environment of - 50 ℃ ~ + 300 ℃。
6。 Acid and alkali resistant, corrosion-resistant, wear-resistant, rolling vehicle resistant, long service life。
The above is a detailed introduction of why Shandong ductile iron manhole covers are round. To learn more, please visit http://www.kpp647.com