The detection method of the well circle of nodular cast iron manhole cover

Check out our ductile cast iron manhole cover, inside the mouth of the ring groove location T shape, form a rubber ring, can very good prevent coverage in running, jumping, has increased the manhole cover and the surface area of the mouth of the inner circle, increase the anastomosis and the contact area. Botou tianlong casting ductile iron manhole cover surface is a kind of cross - shaped triangular pattern with good anti-slip effect.

Botou tianlong casting ductile iron well cover loop detection method:

1. Inspection of manhole cover: it is necessary to strictly follow the relevant national inspection standards.

2. Appearance of nodular cast iron manhole cover: there is no obvious casting defect, and the cast pattern is clear.

3. The flatness test of the nodular cast iron well cover: it can be carried out with the special placer inspection tool when checking.

4. Load-bearing load of nodular cast iron manhole cover: the method of sampling inspection shall be carried out and the test pressure test shall be carried out by the press. If the pressure of the nodular cast iron manhole cover is 360KN or 210KN, it shall be confirmed.

5. Diameter inspection: check the diameter of the nodular cast iron manhole covers, shall make, the use of special tools to control the ZhiJiang of nodular cast iron manhole cover covers the size of the range, depth requirements for 40 mm, detection of bolt hole should be used when special fixture to each test.

6. To detect the spray paint effect of nodular cast iron manhole cover.

7. Check the combined effect of the nodular cast iron manhole cover to ensure that the nodular cast iron manhole cover will not be wobbly and loud after the installation and use, and the well cover shall not exceed 1mm with the well frame.