The installation and maintenance of anti-theft manhole covers must comply with specific technical specifications.
Manhole covers should possess multiple functions, including anti-theft, anti-fall, anti-slip, anti-displacement, noise reduction, and easy opening. Manhole covers should preferably use internal pins or hinges for anti-theft, and should have locking devices with anti-corrosion treatment.
Five-proof manhole covers feature noise reduction, jump prevention, anti-theft, fall prevention, and displacement prevention. Ductile iron anti-theft manhole covers, due to the added fixing device, not only prevent theft but also prevent the cover from being easily washed away by accumulated water, further increasing the safety of the manhole cover.
In the manhole cover maintenance standards, the solution for the problem of a lost manhole cover is reinstallation.
