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Fire
The result of the chemical combination of a
combustible material (fuel) with oxygen in the
presence of enough heat.
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Basic Chemistry of Fire
1. Fuel or Combustible material
a material,
which contains chemical elements that will
react with oxygen, and under proper
conditions, produces fire.
2. Oxygen
we need 16% oxygen to sustain fire
3. Sufficient heatto raise the temperature of the
fuel surface to a point where chemical union of
the fuel and oxygen occurs.
4. Chemical Chain Reaction
vapors of gases,
which are distilled during burning process of a
material, are carried into the flame.
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Fire Tetrahedron
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Fire Extinguishing Method
1. Isolation
by eliminating the
combustible material
2. Smothering by cutting of the oxygen
supply3. Quenchingby cooling to a point below
ignition temperature
4. Inhibition by inhibiting the rapid
oxidation of the fuel
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Classification of Fires and Extinguishing Methods
1. Class Afires
are fires involving organic solids
like paper, wood, etc.
2. Class B fires are fires involving flammable
liquids
3. Class C fires
are fires involving electrical
equipment
4. Class D fires are fires involving combustible
metals such as magnesium, titanium,
zirconium, sodium and potassium
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Classification of Fires and Extinguishing Methods
1.ClassAfiresASH
2.ClassBfiresBOILING
3.ClassC firesCURRENT
4.ClassDfires
DENSE
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Classes of Fire
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How to use Fire Extinguisher
Twist the pin
Pull the pin
Aim low at the base of the fire
Squeeze the lever
Sweep from side to side
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Types of Fire Extinguisher
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How to use a FIRE EXTINGUISHER
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Lesson 7Fire Safety
Sources:
DOLE
Occupational Safety and Health StandardsPEME Consultancy, IncCOSH Manual
Youtube.com
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Do not use WATERon GREASEor OILfire
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Cost of Fire Extinguisher
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Fire Escape Plan
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Fire Exit Door
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Fire in 5 minutes
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Fire Escape Planning
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End of Presentation
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