Ductile iron is a high-strength cast iron material with comprehensive properties close to that of steel.It is precisely based on its properties that it has been used to cast some parts with high requirements for strength,toughness,and wear resistance under large forces.Ductile iron has rapidly grown into a widely used cast iron material,second only to gray iron.The so-called"replacing steel with iron"mainly refers to ductile iron.Important application areas of ductile manhole covers include municipal roads,highways,communication,electricity,tap water,residential areas,schools,and other industrial parks.What are the inspection techniques for the well rings of ductile iron manhole covers?Now let's talk about it for everyone.

　　1.Inspection of manhole covers:It must be strictly carried out according to the corresponding inspection standards of the country.

　　2.The surface of the ductile iron manhole cover:There are no significant casting defects,and the cast pattern is clear.

　　3.Flatness inspection of ductile iron manhole covers:The inspection time can be carried out using specialized molds for inspection.

　　4.Diameter inspection:When checking the diameter of the ductile iron manhole cover,special tools should be used.The branch of the ductile iron manhole cover should be controlled within the scope of the manhole cover size,with a depth requirement of 40mm.The time for detecting bolt holes should be checked one by one using specialized inspection tools.

　　5.Inspect the painting results of ductile iron manhole covers.

　　6.The combination results of the inspection of the ductile iron manhole cover ensure that there will be no swinging or noise after the placement and utilization of the ductile iron manhole cover,and the joint distance between the manhole cover and the manhole frame shall not exceed 1mm.

　　The above is the inspection technique for the well ring of ductile iron manhole cover.Have you all understood it?I hope it can be helpful to everyone.If you have any further questions,please feel free to call the company and we will answer them one by one.