Manhole Covers are used to shield the manholes. Manholes are
commonly used for the inspection, maintenance, and removing any obstruction
from the sewer lines. It is a removable plate founding the lid over the opening
of a manhole to stop anything or anyone from slipping in and to keep out
unauthorized individuals and material.
Description of Manhole Cover
Manhole covers are usually manufactured from concrete, cast
iron, or a combination of both of them. They may also be fabricated from
armored glass plastic or other composite material (especially in places where
cover theft is of concern). Because of regulation restricting acceptable manual
handling masses, mostly lighter weight composite manhole cover materials are
also favored, which offers the advantages of excellent slip resistance and
electrical insulating properties. Surface anti-slip thread ensures safe road
conditions, even in extreme weather.
These shelters usually have pick holes, into which a hook grip
tool is incorporated to lift them. Pick holes can be obscured for a more
watertight lid or can permit light to shine through. A manhole pick hole or
hook is generally used to lift them, though other equipment can be used as
well, such as the electromagnets.
Advantages
Good manhole covers serve great convenience and have many
benefits to offer.
Corrosion-Resistant
The right manhole cover is resistant to chemicals and is not
subject to corrosion and rust caused by continuous exposure to atmospheric
agents. It keeps its weight-bearing capacity unaffected when tested at -80 C°
and at +100 C°. The use of the right manhole cover is appropriate for areas
with flammable liquids because it resists to corroding materials and decreases
the hazard of dangerous sparks.
Noise Reduction
The right material of a manhole cover helps in noise reduction
in pedestrian and traffic areas. The sealing and material used for installation
make it ideal for the reduction and of smell released in the atmosphere.
Various Applications
China manhole covers suppliers provide excellent manhole covers for various uses,
including telecom cabling, inspection chambers for sewerage, water, gas, and
petroleum installations; underground electric cabling, beautification of
gardens and landscapes, etc.
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