fire extinguisher presentation

8/19/2019 Fire Extinguisher Presentation

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EXTINGUISHER

Fire Safety &Fire Extinguisher Use


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Objectives

• Understand the combustion process and

different fire classes

• Understand fire extinguisher types, operating

procedures

• Understand basic firefighting concepts:

• R.A.C.E.• P.A.S.S.

Fire Safety & Fire Extinguisher Use


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The Combustion Process

Fire Safety & Fire Extinguisher Use

• Three components• Need all three

components to start afire

• Fire extinguishersremove one or more ofthe components.


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Fire Classes

A Trash Wood Paper

C Electrical Equipment

B Liquids Grease

COMBUSTIBLE

METALS

D

• wood

• paper

• cloth

• etc.

• gasoline

• oil

• grease

• other solvents

• computers

• fax machine

• other energizedelectrical equip.

• magnesium• sodium

• potassium

• titanium

• otherflammablemetals


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Fire Classes (cont.)

K Cooking Media

• Recently recognized by NFPA 10

• Fires involving combustible oils,

lards and fats in commercialcooking.

CLASS K FIRES


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Fire Extinguisher Anatomy

DISCHARGE HOSE

DISCHARGE NOZZLE

DISCHARGE ORIFICE

BODY

DATA PLATE

CARRYINGHANDLE

PRESSURE GAUGE(not found on CO 2

extinguishers)

DISCHARGE LEVER

DISCHARGE LOCKING PIN AND SEAL


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Types of Fire Extinguishers

Different types of fire extinguishers are designed tofight different classes of fire.

The 3 most common types of fire extinguishers are:

1. Water (APW)

2. Carbon Dioxide (CO2)

3. Dry Chemical (ABC, BC, DC)


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Fire Extinguisher Types

• Class “A” fires only

• 2.5 gal. water(up to 1 minute discharge time)

• Has pressure gauge to allow visual

capacity check • 30-40 ft. maximum effective range

• Can be started and stopped asnecessary

• Extinguishes by cooling burningmaterial below the ignition point.

PRESSURIZED WATER A Trash Wood Paper

B Liquids Grease


A Trash Wood Paper

B Liquids Grease



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Fire Extinguisher Types (cont.)

• Class “B” or “C” fires

• 2.5-100 lb. of CO2(8-30 seconds discharge time)

• Has NO pressure gauge--capacityverified by weight

• 3-8 ft. maximum effective range

• Extinguishes by smothering burningmaterials

• Effectiveness decreases astemperature of burning materialincreases.

CARBON DIOXIDE (CO2) A Trash Wood Paper

B Liquids Grease


A Trash Wood Paper

B Liquids Grease



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• Class “A”, “B”, or “C” fires• 2.5-20 lb. dry chemical

(ammonium phosphate)8-25 seconds discharge time)

• Has pressure gauge to allowvisual capacity check

• 5-20 ft. maximum effective

range• Extinguishes by smothering

burning materials.

•전기화재에는 적절하지 않음

MULTIPURPOSE (ABC) DRY CHEMICAL A Trash Wood Paper

B Liquids Grease


A Trash Wood Paper

B Liquids Grease



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• BC Type Fire Extinguishers

- Type

urea-based potassium bicarbonate, sodium bicarbonate,

potassium bicarbonate or potassium chloride based powder

- One of the most effective dry chemicals against Class B

fires.- Potassium Bicarbonate(Purple-K) based material containing

additive

- Purple-K is at least 4 to 5 times more effective in extinguisher

applied than carbon dioxide and more than twice as effective

as sodium bicarbonate based extinguisher.



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• METAL FIRES• Used on fires involving metals such as

magnesium, titanium, zirconium, sodium,and potassium.

• Often specific for the type of metal inquestion.

• Have no rating nor given a mult i-purposerating for use on other types of fires.


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Fire Extinguisher Summary

EXTINGUISHER TYPE WORKS BY EFFECTIVE AGAINST

PRESSURIZEDWATER

CARBONDIOXIDE

MULTIPURPOSEDRY CHEMICAL

COOLING

SMOTHERING

SMOTHERING


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Fire Emergency Response

R R escue

A larm

C ontain

E xtinguish

A

C

E


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Fighting the Fire

P ull the pin

A im low at the base of flames

S queeze the handle

S weep side to side

P

A

S

S

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