f.
Examining extinguishers at least once a year.
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g.
Pursuant to the existing regulation, ensuring
that
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pressure-type extinguishers are tested hydrostatically.
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h.
Following all current directives
pertaining
to
the
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maintenance of fire extinguishers.
There are several types of fire extinguishers that are available
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for use in the laboratory; some of these are the:
soda-acid
antifreeze
loaded-stream
carbon dioxide
dry chemical
purple K
Most fire extinguishers are designed for use on specific types
of fires.
To help you in deciding which fire extinguisher to
use in the event of a fire, fires are categorized into four main
classes: Classes A through D. See FM 10-67-2, Chapter 10, for
more information on classes of fire.
6.
Extinguishing Fires
The preferred extinguishing agent is dictated by the source of the fire. This knowledge must be instilled in
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€
laboratory technicians and practiced regularly. Water should only be used as a last
resort for extinguishing petroleum fires.
Blankets are mainly
used to put out fires on personnel clothing. Wet blankets can be
used effectively to smother fires at a vapor leak. Ensure that
fire blankets open and draw without difficulty. Make sure that
blankets are firmly attached to their supports. Ensure they DO
NOT have holes. Make sure that the bottoms of the fire blankets
are as close to the floor as the case design permits.
Carbon dioxide is suitable for use on most petroleum fires. It
is an effective alternate to water.
Sand is most effective on
small fires caused by flammable liquids and grease on the floor.
If you use water on oil fires, you will spread the fire. Water
is a conductor of electricity and should not be used on
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4-5
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