Testing technique for the ring of ductile iron manhole cover
Ductile iron manhole cover is often seen in our city, it can be seen that its use effect is very good, for us to bring great help. So how much do we know about the product? The following ductile iron manhole cover manufacturers will take us to do further understanding.
It is not hard to find that many cases of injuries caused by manhole covers have emerged in an endless number. If we do not understand the safety of manhole cover knowledge, it will cause a certain threat to our own safety, if the shaft frame base treatment is not in place, or the quality of the choice of manhole cover does not meet national standards, will lead to the damage of the well. Pay attention to the road conditions on rainy days. When you see water coming out of the road, beware of the manhole cover being washed away. Pedestrians who don't look at the road and talk on their cell phones should be more careful about lighting up. For places where there are no or dim lamps, we need to bring our own flashlight. Don't jaywalk. There are a lot of manhole covers, Ductile iron Gratings on the road. When we are familiar with the safety of these ductile iron manhole cover knowledge, walking on the road will be more confident, because many people lack of safety awareness and basic knowledge, so led to a lot of tragedy, so to speak, more learn the safety of manhole cover knowledge is necessary.
Testing technique of well rim of ductile iron manhole cover:
1. Inspection of manhole cover: it must be carried out in strict accordance with the corresponding inspection scale of the country.
2. Surface of spheroidal graphite cast iron manhole cover: there is no significant casting defect, and the pattern of casting is clearer than that of force.
3. Flatness inspection of ductile iron manhole cover: the inspection time can be accepted for special tools inspection.
4. Diameter inspection: the time to check the diameter of the nodular cast iron manhole cover shall be conducted with special materials. The zhijiang of the nodular cast iron manhole cover shall be controlled after the scope of the Custom manhole cover size, and the depth shall be 40mm.
5. Test the spray paint result of spheroidal graphite cast iron manhole cover.
6. Test the combination results of the spheroidal graphite cast iron manhole cover. It is guaranteed that the spheroidal graphite cast iron manhole cover will not sway and make noises after it is placed and utilized.