The classification standard for cast iron manhole covers is because the steel is initially recyclable and the quality of the steel is very heavy.For materials,people need to weigh the weight of price conversion.Therefore,the anti-theft work of urban road manhole covers is very important.Please consider that if our city road manhole covers are covered,if you steal all of them,there will be large holes on the road.Pedestrian travel is very dangerous.If not careful,it is easy to fall.

　　When making ductile iron manhole covers,they are made by high-temperature forming method and have a natural anti-theft function.Its corrosiveness and properties are very good.It will not deform or deteriorate for a long time,and its stability is also very good.Cast iron manhole covers are supported by steel,even when subjected to destructive loads

　　It is not powdery crushing,but has performance indicators such as resistance to denaturation and load-bearing capacity.Through inspection of the construction project quality supervision and inspection base,the place has facilitated installation and protection.According to customer requirements,various standards and colors of goods have even been produced in management,and the city has been beautified.

　　Cast iron manhole cover

　　The market sales of cast iron manhole covers are very good because the products produced by the manufacturers of cast iron manhole covers are made of ductile iron,which has anti-theft performance and excellent performance.It has anti-theft function in actual use.

　　The abnormal sound made by the cast iron manhole cover is of course an abnormal situation.It is highly likely that the sound is caused by damaged internal components or loose manhole covers.Many people do not pay attention to this noise because many manhole covers now have some anti falling functions,but this does not mean that the sound of the cast iron manhole cover will not cause any problems.It is necessary to handle it in a timely manner,Below,the editor will provide you with a detailed explanation.

　　Method of making noise:

　　1.The slightest factor contributing to the noise is closely related to the bite between the manhole cover and the road surface.According to CNC machining,the originally not very sharp well ring is planed flat,so that it can be closely connected with the well ring,resulting in the sound emitted by vibration.

　　2.A concave groove has been opened inside the well ring through a lathe,which is equipped with shock absorbing rubber blocks to prevent vibration and noise.In addition,there are three buckles inside the manhole cover,which can be fastened to stabilize the well ring and reduce noise.

　　2、Regulations to be followed after lifting and tightening:

　　1.The equipment complies with relevant product specifications and transportation load specifications,and maintains stability with the floor.

　　2.The connection between the two bases of the manhole cover should be inseparable and firm,with anti-theft and anti-theft capabilities.

　　When there is a problem with the manhole cover,that is,there is a sound,our concerns are very good.It is indeed not a problem.A sound indicates that the manhole cover is about to create a problem,generating a type of warning message.We hope that we can pay attention to this situation when using it,inspect and repair it on time,and prevent minor losses.