The toughness of ductile manhole covers is better, and its impact is more than 10 times that of gray iron materials. Moreover, ductile iron manhole covers have been widely used as the main factor for main roads. Its strength is also relatively high. It can be compared with low-carbon steel. The same is three times that of gray iron materials, the price of iron, and the quality of steel.
In life, there are always unconscious people who steal the well covers on the road to sell. Classification standard for ductile iron manhole covers. Because materials such as steel can be recycled and sold originally, and the quality of steel materials is very heavy, people have to convert the price of recycled materials according to the weighed weight, so for cities The work to be done for road manhole covers is to prevent theft. Think about it, everyone. If the cover of the well on the road in our city is stolen, will there be large holes in the road, which is very disturbing for pedestrians, and it is very easy to fall off accidentally.
Nobody was found for the ductile iron manhole cover because all the manhole covers are processed by lathes to solve the noise caused by wheel rolling. Secondly, the spheroidal graphite cast iron manhole cover and the well ring are almost well designed and reasonable, which guarantees that the fast-moving vehicle will warn the phenomenon without turning over and shifting after passing. What are the advantages of its application life spheroidal graphite cast iron manhole cover is relatively long, in normal conditions It can be used for more than 30 years. In addition, this product has a reasonable design and is more convenient to install and open. It is very conducive to the inspection and maintenance of underground pipeline facilities. The weight is relatively light and the weight is relatively large. The product has clear wrinkles and is non-slip. The performance is superior.
spherical ink manhole covers are divided according to the material of the manhole cover
1> Metal manhole covers: ductile iron manhole covers, gray cast iron manhole covers, bronze manhole covers, etc.
2> High-strength steel fiber cement concrete manhole cover (cement-based composite material)
3> Recycled cast iron manhole cover (recycled resin matrix composite material)
4> Polymer matrix composite material inspection manhole cover, etc.
Spherical ink manhole cover bearing capacity division
1> Heavy-duty manhole cover: municipal road traffic and heavy vehicle traffic use
2> Light manhole cover: public road traffic and light vehicle traffic use
The bearing capacity of spherical ink manhole covers is divided into four categories: A, B, C, and D.
1> Cast iron manhole covers are used in airports and other roads and venues.
2> Steel fiber concrete inspection manhole covers are used for urban roads, highways and parking lots where motor vehicles run and park.
3> Steel fiber concrete manhole covers are used for slow lanes, passages and sidewalks in residential quarters,
4> Steel fiber concrete inspection manhole covers are used in green belts and alleys and sites where motor vehicles cannot drive or park? Divided by the distribution and application scope of cast iron manhole covers
1> Underground pipeline manhole covers for factories, enterprises, units and residential communities, and green belts
2> Underground pipeline manhole covers for urban public road transportation facilities?
4. Divided by pipeline types: rainwater, sewage, water supply, gas, hot gas, power supply, communications, cable television, traffic signal lines, etc. This type of manhole cover is mostly an underground pipeline type set in road engineering.
5. Divided according to the ownership of the manhole cover
1> Manhole covers whose property rights belong to pipeline companies in various industries
2> The manhole cover whose property right belongs to the user
The function of ductile iron manhole cover is to cover the defenses of the road or deep well in the home to prevent people or objects from falling. It is generally divided into round and square. In the urban road administration, the round is generally used, because the round ductile iron manhole cover is not easy to tilt and can better protect the safety of pedestrians and vehicles. The use of circular shape is mainly considering that the length of each diameter of the round manhole cover passing through its center is the same, so that if the manhole cover is rolled up by a passing vehicle, because no matter how it is rolled up, its diameter will be slightly smaller than that of the wellhead below. Wide, the manhole cover will not fall into the wellhead.
