The document discusses different types of fire extinguishers, including how they are constructed, how they work, and which types of fires they are meant to be used on. It describes modern fire extinguishers as being made of steel or aluminum alloys to provide durability. It also explains the various methods of operation for different types of fire extinguishers, such as using pressure to force an extinguishing agent onto a fire. The document categorizes fires into different classes and identifies which type of fire extinguisher is best for each class.

1. Demonstrate types of fireDemonstrate types of fire
extinguishersextinguishers

2. Enrollment no.Enrollment no.
146490305002146490305002
146490305005146490305005
146490305008146490305008

3. ConstructionConstruction
 Modern fire extinguishers are constructed from steel,Modern fire extinguishers are constructed from steel,
aluminum or aluminum alloy. These materials are used toaluminum or aluminum alloy. These materials are used to
create a durable exterior for fire extinguishers. The exteriorscreate a durable exterior for fire extinguishers. The exteriors
can withstand knocks, external temperatures and corrosion.can withstand knocks, external temperatures and corrosion.
 The gas cartridge operated fire extinguishers are coated inThe gas cartridge operated fire extinguishers are coated in
plastic to provide the cartridge extra protection against theplastic to provide the cartridge extra protection against the
contents of the fire extinguisher. Gas cartridges can becontents of the fire extinguisher. Gas cartridges can be
piercing disc or frangible pipe cartridgespiercing disc or frangible pipe cartridges..

4. WorkingWorking
 The fire extinguisher is operated by releasing the pin, breakingThe fire extinguisher is operated by releasing the pin, breaking
the tamper seal and pressing down on the fire extinguisherthe tamper seal and pressing down on the fire extinguisher
handle.handle.
 The pressure stored within the top of the fire extinguisher (dryThe pressure stored within the top of the fire extinguisher (dry
air or nitrogen) is released.air or nitrogen) is released.
 The pressure forces down on the extinguishing agent withinThe pressure forces down on the extinguishing agent within
the fire extinguisher (water, foam, powder etc.)the fire extinguisher (water, foam, powder etc.)
 The extinguishing agent is forced up the syphon tube withinThe extinguishing agent is forced up the syphon tube within
the fire extinguisher, through the head cap and hose onto thethe fire extinguisher, through the head cap and hose onto the
fire.fire.
 Some fire extinguisher hoses are fitted with a squeeze gripSome fire extinguisher hoses are fitted with a squeeze grip
control to regulate the flow of the extinguishant.control to regulate the flow of the extinguishant.

5.  How fire works ?
 There are three elements that must be present for fire
to exist
 Oxygen to combustion
 Heat to raise the material to its ignition temperature
 Fuel to support the combustion

6. What type of fire extinguisher is right forWhat type of fire extinguisher is right for
you ?you ?
CLASS A :- Solid such as paper, wood, Plastic etcCLASS A :- Solid such as paper, wood, Plastic etc
CLASS B :- Flammable liquid such as Paraffin, petrol, oil etcCLASS B :- Flammable liquid such as Paraffin, petrol, oil etc
CLASS C :- Flammable gases such as propane, butane, methaneCLASS C :- Flammable gases such as propane, butane, methane
etcetc
CLASS D :- Metals such as aluminium, magnesium, titaniumCLASS D :- Metals such as aluminium, magnesium, titanium
etcetc
CLASS E :- Fire involving electrical apparatusCLASS E :- Fire involving electrical apparatus
CLASS F :- Cooking oil & fat etcCLASS F :- Cooking oil & fat etc

7. Water fire extinguisherWater fire extinguisher
 Work by removing heat element of aWork by removing heat element of a
firefire
 Should only be used on CLASS A fireShould only be used on CLASS A fire
 CALSS A fire include commonCALSS A fire include common
combustible material like wood, papercombustible material like wood, paper
and most plasticsand most plastics

8. Foam fire extinguisherFoam fire extinguisher
 Work by removing the heat elementWork by removing the heat element
of fire and also separating theof fire and also separating the
oxygen from other elementoxygen from other element
 Should only be used on CLASS AShould only be used on CLASS A
& B fire& B fire
 CALSS A fire include commonCALSS A fire include common
combustible material like wood,combustible material like wood,
paper and most plasticspaper and most plastics
 CLASS B fire involve flammable orCLASS B fire involve flammable or
Combustible liquid such as paraffin,Combustible liquid such as paraffin,
petrol and oilpetrol and oil

9.  It contain hydrocarbon - based surfactant such as sodiumIt contain hydrocarbon - based surfactant such as sodium
alkali sulfatealkali sulfate
 Protein foamsProtein foams
 It contain natural proteins as the foaming agentIt contain natural proteins as the foaming agent

10. Carbon dioxide fire extinguisherCarbon dioxide fire extinguisher
 Work by removing the oxygenWork by removing the oxygen
element of a fire and also helpingelement of a fire and also helping
remove heat due to a very coldremove heat due to a very cold
dischargedischarge
 Should only be used on CLASS BShould only be used on CLASS B
& E& E
 CLASS B fire involve flammable orCLASS B fire involve flammable or
Combustible liquid such as paraffin,Combustible liquid such as paraffin,
petrol and oilpetrol and oil

11.  CLASS E fire involve electrical equipment such asCLASS E fire involve electrical equipment such as
appliances, wiring, circuit breakers and outletsappliances, wiring, circuit breakers and outlets

12. Dry chemical fire extinguisherDry chemical fire extinguisher
 Primary work by interrupting thePrimary work by interrupting the
chemical reaction of a firechemical reaction of a fire
 A very versatile fire extinguisher,A very versatile fire extinguisher,
these are rated to be effective onthese are rated to be effective on
CLASS A, B & ECLASS A, B & E
 Since CLASS A, B & E fire are theSince CLASS A, B & E fire are the
most common, dry chemical firemost common, dry chemical fire
extinguisher are the most widely usedextinguisher are the most widely used
in home fire situationin home fire situation

13.  It contain ammonium polyphosphate, potassium bicarbonate,It contain ammonium polyphosphate, potassium bicarbonate,
potassium chloridepotassium chloride

14. Wet chemical fire extinguisherWet chemical fire extinguisher
 Work by first removing the heatWork by first removing the heat
element of a fire and then preventingelement of a fire and then preventing
re-ignition by creating a barrierre-ignition by creating a barrier
between the oxygen and fuel element.between the oxygen and fuel element.
 This type of fire extinguisher wasThis type of fire extinguisher was
specifically developed for CLASS Fspecifically developed for CLASS F
fire that involve by cooking oil &fire that involve by cooking oil &
fatsfats
 Most often CLASS F fire occur inMost often CLASS F fire occur in
commercial restaurants and cafeteriacommercial restaurants and cafeteria
sittingsitting

15.  It contain potassium acetate - based agentIt contain potassium acetate - based agent

16. Clean agent fire extinguisherClean agent fire extinguisher
 Also known as halogenated fireAlso known as halogenated fire
extinguisher they work byextinguisher they work by
interrupting the chemical reactioninterrupting the chemical reaction
of a fireof a fire
 Clean agent fire extinguisher areClean agent fire extinguisher are
primarily for CLASS B & E firesprimarily for CLASS B & E fires
 CLASS B fire involve flammable orCLASS B fire involve flammable or
Combustible liquid such as paraffin,Combustible liquid such as paraffin,
petrol and oilpetrol and oil

17.  CLASS E fire involve electrical equipment such asCLASS E fire involve electrical equipment such as
appliances, wiring, circuit breakers and outletsappliances, wiring, circuit breakers and outlets

18. Dry powder fire extinguisherDry powder fire extinguisher
 Work by separating the fuel from theWork by separating the fuel from the
oxygen of a fireoxygen of a fire
 Dry powder fire extinguishers are only forDry powder fire extinguishers are only for
in CLASS D firesin CLASS D fires
 CLASS D fire involve combustibleCLASS D fire involve combustible
metals like aluminum, magnesium, titaniummetals like aluminum, magnesium, titanium
this type of fire might occur in a chemicalthis type of fire might occur in a chemical
laboratorylaboratory

19. Thank youThank you