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Which fire extinguisher should you choose?
Water fire extinguishers
This fire extinguisher can be used for Class A fires i.e. solids only, such
as wood, paper and fabrics. Not suitable for Class B liquid fires i.e. paraffin,
petrol, oil fires, or where electricity is involved. The fire extinguisher is colour
coded red. The fire extinguisher works by cooling burning material.
How to use a water fire extinguisher:
- Direct the jet at the base of the flame and keep it moving across the area of the
fire.
- Seek out any hot spots after the main fire is extinguished.
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A fire spreading vertically should be attacked at its lowest point and followed
upwards.
Foam fire extinguishers
This fire extinguisher is more versatile than water. It can be used for
Classes A & B fires but is not recommended for fires involving electricity. The
fire extinguisher is colour coded cream. The fire extinguisher forms a blanket or
film on the surface of a burning liquid.
How to use a foam fire extinguisher:
- Where the liquid on a fire is in a container, direct the spray at the back edge
of the container or at an adjoining vertical surface above the level of the burning
liquid. This allows the foam to build up and flow across the surface of the liquid
to smother the fire.
- Where this is not possible stand well back, direct the spray with a gentle sweeping
movement, allow the foam to drop down and lie on the surface of the liquid.
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Do not aim the spray directly into the liquid as this will drive the foam beneath
the surface and render it ineffective. In addition, it may splash the fire onto
the surroundings.
Dry powder fire extinguishers
This fire extinguisher is a multi-purpose fire extinguisher and can be used on Classes
A, B & C fires. The fire extinguisher is colour coded blue. The fire extinguisher
works by "knocking down" the flames.
How to use a dry powder fire extinguisher:
- On fires involving either liquids in containers or spilled liquids, direct the nozzle
towards the near edge of the fire. With the rapid sweeping motion drive the fire
towards the far edge until all the flames are extinguished.
- On fires involving flowing liquids, direct the nozzle at the base of the flames
and sweep upwards.
- On fires in electrical equipment, switch of the current if safe to do so and then
direct the nozzle straight at the fire.
- Where the equipment is enclosed, direct into any opening with the object of penetrating
the interior.
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When the fire appears to be extinguished shut off the discharger and wait until
the atmosphere clears. If any flame is then still visible, discharge again.
Co2 fire extinguishers
This fire extinguisher is ideal for fires involving electrical apparatus and Class
B liquid fires. It does not cool and is not suitable for solids. The fire extinguisher
is colour coded black.
How to use a Co2 fire extinguisher:
- Carbon dioxide extinguishers should NOT be used in confined spaces where there is
a danger that fumes may be inhaled.
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DO NOT HOLD THE HORN SINCE IT BECOMES EXTREMELY COLD DURING USE.
Wet chemical fire extinguishers
This fire extinguisher is used for Class F cooking oil or fat fires.
How to use a wet chemical fire extinguishers:
- Turn off the source of heat if safe to do so.
- Hold the lance at arm's length, well above the fire with its nozzle at least 1 Metre
away from the fire.
- Holding the lance still, discharge so that the spraying wet chemical falls gently
onto the surface of the fire.
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Even if the fire appears to go out quickly, discharge the entire contents of the
extinguisher.
Training
All people regularly employed in a workplace should be aware of the risk of fire.
They need to know:
- How to summon the fire brigade.
- How to warn others of the fire including the operation of the fire -warning apparatus.
- The location and use of escape routes
- The procedure for assisting visitors or members of the public from the workplace.
- The location of the fire assembly point.
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How to use the fire equipment provided.
Disclaimer
The advice given is general in nature and a full fire risk assessment should be
carried out to determine exactly what fire precautions are necessary.
Legislation
The Fire Precautions Act 1971 covers the requirement for fire certificates for certain
buildings, the Fire Precautions (Workplace) (Amended) Regulations 1999, made under
that Act, place an absolute duty on every employer to comply with the Regulations
in all work premises (including temporary structures). The Management of Health
and Safety at Work Regulations 1999 require a risk assessment to be carried out
to identify any measures required by the Fire Precautions Regulations. These Regulations
mean that all workplaces may be subject to an inspection by the Fire Authority.
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