FIRE

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FIRE

• assembled by
• Herb Krelle
• Supplementary resources collected from the World
  Wide Web thanks to the many providers.

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The Fire Triangle

• In order to understand how fire extinguishers
  work, you first need to know a little bit about
  fire.

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The Fire Triangle

• In order to understand how fire extinguishers
  work, you first need to know a little bit about
  fire.

Fire is a chemical reaction involving rapid
oxidation (burning) of a fuel.
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The Fire Triangle
Four things must be present at the same time in
order to produce fire
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The Fire Triangle

• FUEL - any combustible material - solid, liquid
  or gas. Most solids and liquids must vaporize
  before they will burn.

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The Fire Triangle

• FUEL - any combustible material - solid, liquid
  or gas. Most solids and liquids must vaporize
  before they will burn.
• OXYGEN - Sufficient oxygen must be present in the
  atmosphere surrounding the fuel for fire to burn.
  

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The Fire Triangle

• FUEL - any combustible material - solid, liquid
  or gas. Most solids and liquids must vaporize
  before they will burn.
• OXYGEN - Sufficient oxygen must be present in the
  atmosphere surrounding the fuel for fire to burn.
  
• HEAT- Sufficient heat energy must be applied to
  raise the fuel to it's ignition temperature

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The Fire Triangle

• FUEL - any combustible material - solid, liquid
  or gas. Most solids and liquids must vaporize
  before they will burn.
• OXYGEN - Sufficient oxygen must be present in the
  atmosphere surrounding the fuel for fire to burn.
  
• HEAT- Sufficient heat energy must be applied to
  raise the fuel to it's ignition temperature
• Chemical, exothermic reaction - This reaction can
  occur when all three of the above elements are
  present in the proper conditions and proportions.
  Fire (rapid oxidisation) is the result of this
  chemical reaction.

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The Fire Triangle

• FUEL - any combustible material - solid, liquid
  or gas. Most solids and liquids must vaporize
  before they will burn.
• OXYGEN - Sufficient oxygen must be present in the
  atmosphere surrounding the fuel for fire to burn.
  
• HEAT- Sufficient heat energy must be applied to
  raise the fuel to it's ignition temperature
• Chemical, exothermic reaction - This reaction can
  occur when all three of the above elements are
  present in the proper conditions and proportions.
  Fire (rapid oxidisation) is the result of this
  chemical reaction.

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The Fire Triangle

• FUEL - any combustible material - solid, liquid
  or gas. Most solids and liquids must vaporize
  before they will burn.
• OXYGEN - Sufficient oxygen must be present in the
  atmosphere surrounding the fuel for fire to burn.
  
• HEAT- Sufficient heat energy must be applied to
  raise the fuel to it's ignition temperature
• Chemical, exothermic reaction - This reaction can
  occur when all three of the above elements are
  present in the proper conditions and proportions.
  Fire (rapid oxidisation) is the result of this
  chemical reaction.

Fire extinguishers put out fire by taking away
one or more elements of the fire
triangle/tetrahedron.
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Classes of fires
Fires are categorized into classes according to
the type of fuel or the dangers present.
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Classes of fires
Class A Extinguishers will put out fires in
ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires
involving flammable liquids, such as grease,
gasoline, oil, etc. Class C Extinguishers
should be used on fires involving flammable
gas. Class D Extinguishers are designed for use
on flammable metals and are often specific for
the type of metal in question. Class E
Extinguishers are suitable for use when
electricity is present. Class F Extinguishers
are suitable for cooking oils and fats.
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Classes of fires
Class A Extinguishers will put out fires in
ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires
involving flammable liquids, such as gasoline,
oil, etc. Class C Extinguishers should be used
on fires involving flammable gas. Class D
Extinguishers are designed for use on flammable
metals and are often specific for the type of
metal in question. Class E Extinguishers are
suitable for use when electricity is
present. Class F Extinguishers are suitable for
cooking oils and fats.
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Classes of fires
Class A Extinguishers will put out fires in
ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires
involving flammable liquids, such as gasoline,
oil, etc. Class C Extinguishers should be used
on fires involving flammable gas. Class D
Extinguishers are designed for use on flammable
metals and are often specific for the type of
metal in question. Class E Extinguishers are
suitable for use when electricity is
present. Class F Extinguishers are suitable for
cooking oils and fats.
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Classes of fires
Class A Extinguishers will put out fires in
ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires
involving flammable liquids, such as gasoline,
oil, etc. Class C Extinguishers should be used
on fires involving flammable gas. Class D
Extinguishers are designed for use on flammable
metals and are often specific for the type of
metal in question. Class E Extinguishers are
suitable for use when electricity is
present. Class F Extinguishers are suitable for
cooking oils and fats.
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Classes of fires
Class A Extinguishers will put out fires in
ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires
involving flammable liquids, such as gasoline,
oil, etc. Class C Extinguishers should be used
on fires involving flammable gas. Class D
Extinguishers are designed for use on flammable
metals and are often specific for the type of
metal in question. Class E Extinguishers are
suitable for use when electricity is
present. Class F Extinguishers are suitable for
cooking oils and fats.
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Classes of fires
Class A Extinguishers will put out fires in
ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires
involving flammable liquids, such as gasoline,
oil, etc. Class C Extinguishers should be used
on fires involving flammable gas. Class D
Extinguishers are designed for use on flammable
metals and are often specific for the type of
metal in question. Class E Extinguishers are
suitable for use when electricity is
present. Class F Extinguishers are suitable for
cooking oils and fats.
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Types of extinguishers
Water (under air pressure) Class of Fire A All
Red body
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A
and B Blue or Red with Blue band.
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A
and B Blue or Red with Blue band. Carbon Dioxide
(CO2) - Class of Fire A, B, (E) and F Red with
Black band.
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A
and B Blue or Red with Blue band. Carbon Dioxide
(CO2) - Class of Fire A, B, (E) and F Red with
Black band. Wet Chemical - Class of Fire A and
FBuff or Red with Buff band.
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A
and B Blue or Red with Blue band. Carbon Dioxide
(CO2) - Class of Fire A, B, (E) and F Red with
Black band. Wet Chemical - Class of Fire A and
FBuff or Red with Buff band. Vaporizing Liquid
- Class of Fire A, B, C and (E) Red with Yellow
Band
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A
and B Blue or Red with Blue band. Carbon Dioxide
(CO2) - Class of Fire A, B, (E) and F Red with
Black band. Wet Chemical - Class of Fire A and
FBuff or Red with Buff band. Vaporizing Liquid
- Class of Fire A, B, C and (E) Red with Yellow
Band Halon (BCF) - Do not use now illegal,
environmental hazard. All Yellow
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A
and B Blue or Red with Blue band. Carbon Dioxide
(CO2) - Class of Fire A, B, (E) and F Red with
Black band. Wet Chemical - Class of Fire A and
FBuff or Red with Buff band. Vaporizing Liquid
- Class of Fire A, B, C and (E) Red with Yellow
Band Halon (BCF) - Do not use now illegal,
environmental hazard. All Yellow
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Types of extinguishers
Water (under air pressure) All Red body Dry
Chemical Powder - Class of Fire A, B, C, (E) and
F Red body White band Foam - Class of Fire A and
B Blue or Red with Blue band. Carbon Dioxide
(CO2) - Class of Fire A, B, (E) and F edith
Black band. Wet Chemical - Class of Fire A and
FBuff or Red with Buff band. Vaporizing
Liquid - Class of Fire A, B, C and (E) Red with
Yellow Band Halon (BCF) - Do not use now
illegal, environmental hazard. All Yellow
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Hose reels
Hose reals are a familiar feature in public
places. Hose reals should only be used when
there is no other way out, the first option in
any fire situation is to get out and call 000
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The End