When we inspect the wellbore of nodular cast iron covers, we can place a T-shaped rubber strip at the slot of the inner covers to form a rubber ring, which can prevent the running and jumping of the covers, increase the surface area of the covers and the inner covers, and increase the area of coincidence and contact. The surface of nodular cast iron well cover adopts the pattern of cross edge triangle, which can play a good anti-skid effect. Specific operation methods, we will take a look with Shandong Ductile Iron Well Cover manufacturers!
1. Inspection of well covers: It must be carried out in strict accordance with the relevant national inspection standards.
2. The appearance of nodular cast iron well cover: there is no obvious casting defect, and the casting pattern is clear.
3. Flatness inspection of nodular cast iron well covers: special tools for tool inspection can be used when inspecting.
4. Load-bearing capacity of nodular cast iron well cover: Sampling inspection is adopted and pressure test is carried out by press. If the pressure of nodular cast iron well cover is 360 KN or 210 KN, it should be confirmed to be qualified.
5. Diameter Inspection: When inspecting the diameter of nodular cast iron covers, special tools should be used. The Zhijiang River of nodular cast iron covers should be controlled within the scope of the size of the covers. The depth requirement is 40 mm. When inspecting bolt holes, special inspectors should be used to inspect them one by one.
6. Testing the spraying effect of nodular cast iron well cover.
7。 Testing the combined effect of nodular cast iron well cover to ensure that the nodular cast iron well cover will not shake and sound after installation and use, and the matching between the well cover and the well frame shall not exceed 1 mm。
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