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FIRE. assembled by Herb Krelle Supplementary resources collected from the World Wide Web thanks to the many providers. The Fire Triangle. In order to understand how fire extinguishers work, you first need to know a little bit about fire. The Fire Triangle.

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slide1

FIRE

assembled by

Herb Krelle

Supplementary resources collected from the World Wide Web thanks to the many providers.

the fire triangle

The Fire Triangle

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

the fire triangle3

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.

the fire triangle4

The Fire Triangle

Four things must be present at the same time in order to produce fire:

the fire triangle5

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

The Fire Triangle

the fire triangle6

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.

The Fire Triangle

the fire triangle7

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

The Fire Triangle

the fire triangle8

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.

The Fire Triangle

the fire triangle9

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.

The Fire Triangle

the fire triangle10

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.

The Fire Triangle

Fire extinguishers put out fire by taking away one or more elements of the fire triangle/tetrahedron.

classes of fires

Classes of fires

Fires are categorized into classes according to the type of fuel or the dangers present.

classes of fires12

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.

Classes of fires

classes of fires13

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.

Classes of fires

classes of fires14

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.

Classes of fires

classes of fires15

Class AExtinguishers 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.

Classes of fires

classes of fires16

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.

Classes of fires

classes of fires17

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.

Classes of fires

types of extinguishers19

Water (under air pressure)

All Red body

Dry Chemical Powder - Class of Fire: A, B, C, (E) and F

Red body White band

Types of extinguishers

types of extinguishers20

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.

Types of extinguishers

types of extinguishers21

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.

Types of extinguishers

types of extinguishers22

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.

Types of extinguishers

types of extinguishers23

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

Types of extinguishers

types of extinguishers24

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

Types of extinguishers

types of extinguishers25

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

Types of extinguishers

types of extinguishers26

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

Types of extinguishers

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

Hose reels