FIREMuhammad Iqbal Khan
SS Biology
Email ID:mikhan1313@yahoo.com
0923135448175
INTRODUCTIONINTRODUCTION
Fires can break out any timeFires can break out any time
 Do you know what to do ?Do you know wh...
The following slide show will help,The following slide show will help,
HOWEVER YOU SHOULD READ YOURHOWEVER YOU SHOULD READ...
IF YOU FIND A FIREIF YOU FIND A FIRE
OR SMELL BURNING OR SEEOR SMELL BURNING OR SEE
SMOKESMOKE
 SHOUT,SHOUT,
 FIRE, FIRE...
FIRE CALL POINTFIRE CALL POINT
BREAK GLASS TO SOUND ALARM
 USE THE NEAREST PHONE AND CALLUSE THE NEAREST PHONE AND CALL
THE EMERGENCY NUMBER.THE EMERGENCY NUMBER.
GIVE YOURGIVE YOUR
 NAMENAME
 WHERE YOU ARE CALLING FROMWHERE YOU ARE CALLING FROM
 WHERE THE FIRE ISWHERE THE FIRE IS
...
ONLY TACKLE A FIRE IF IT ISONLY TACKLE A FIRE IF IT IS
SAFE TO DO SOSAFE TO DO SO
 LEAVE THE BUILDING BY THELEAVE THE BUI...
REMOVE ONE OR MORE OF THE ELEMENTSREMOVE ONE OR MORE OF THE ELEMENTS
REQUIRED TO SUSTAIN COMBUSTION AND THE FIREREQUIRED T...
Fire ExtinguisherFire Extinguisher
Portable device used to put out fires of limitedPortable device used to put out fires o...
 Some extinguishers will put out only oneSome extinguishers will put out only one
class of fire; others are used for two ...
 Fire extinguishers may go unused forFire extinguishers may go unused for
many years, but they must be maintainedmany yea...
Class A fire extinguishersClass A fire extinguishers
 Class A fire extinguishers are usuallyClass A fire extinguishers ar...
EXTINGUISHERS FOR CLASSEXTINGUISHERS FOR CLASS
B FIRESB FIRES
Class B fires are put out by excluding air, byClass B fires ...
 Carbon dioxide is a compressed gas agentCarbon dioxide is a compressed gas agent
that prevents combustion by displacing ...
 The two types of dry chemical extinguishers include oneThe two types of dry chemical extinguishers include one
that cont...
 Most dry chemical extinguishers useMost dry chemical extinguishers use
stored pressure to discharge the agent,stored pre...
 Foam extinguishers use an aqueous filmFoam extinguishers use an aqueous film
forming foam (AFFF) agent that expels aform...
EXTINGUISHERS FOR CLASSEXTINGUISHERS FOR CLASS
C FIRESC FIRES
 The extinguishing agent in a class C fireThe extinguishing...
EXTINGUISHERS FOR CLASSEXTINGUISHERS FOR CLASS
D FIRESD FIRES
 A heat-absorbing extinguishing medium isA heat-absorbing e...
 The extinguisher label gives operatingThe extinguisher label gives operating
instructions and identifies the class, orin...
Under EC directives all new extinguishers are colouredUnder EC directives all new extinguishers are coloured
REDRED
a colo...
OLD STYLE COLOUREDOLD STYLE COLOURED
EXTINGUISHERSEXTINGUISHERS
WATER
FOAM
AFFF POWDER CO2
THE ENDTHE END
Muhammad Iqbal Khan
SS Biology
Email ID:mikhan1313@yahoo.com
0923135448175
Fire extinguishers
Fire extinguishers
Upcoming SlideShare
Loading in …5
×

Fire extinguishers

1,271 views

Published on

Fire extinguishers
By:
Muhammad Iqbal Khan
SS Biology
Email ID:mikhan1313@yahoo.com
0923135448175

Published in: Education, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,271
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
89
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Fire extinguishers

  1. 1. FIREMuhammad Iqbal Khan SS Biology Email ID:mikhan1313@yahoo.com 0923135448175
  2. 2. INTRODUCTIONINTRODUCTION Fires can break out any timeFires can break out any time  Do you know what to do ?Do you know what to do ?  Do you know where to go ?Do you know where to go ?  Do you know which extinguisher to use ?Do you know which extinguisher to use ?
  3. 3. The following slide show will help,The following slide show will help, HOWEVER YOU SHOULD READ YOURHOWEVER YOU SHOULD READ YOUR LOCAL FIRE INSTRUCTIONS,LOCAL FIRE INSTRUCTIONS, IT JUST MIGHT SAVE YOUR LIFEIT JUST MIGHT SAVE YOUR LIFE OR SOMEONE ELSES.OR SOMEONE ELSES.
  4. 4. IF YOU FIND A FIREIF YOU FIND A FIRE OR SMELL BURNING OR SEEOR SMELL BURNING OR SEE SMOKESMOKE  SHOUT,SHOUT,  FIRE, FIRE, FIRE,FIRE, FIRE, FIRE,  don’t be embarrassed or worried aboutdon’t be embarrassed or worried about being wrong and don’t try to be a hero.being wrong and don’t try to be a hero.  Press the nearest FIRE CALL BUTTON,Press the nearest FIRE CALL BUTTON, get to know where they are, normally by orget to know where they are, normally by or close too exits.close too exits.
  5. 5. FIRE CALL POINTFIRE CALL POINT BREAK GLASS TO SOUND ALARM
  6. 6.  USE THE NEAREST PHONE AND CALLUSE THE NEAREST PHONE AND CALL THE EMERGENCY NUMBER.THE EMERGENCY NUMBER.
  7. 7. GIVE YOURGIVE YOUR  NAMENAME  WHERE YOU ARE CALLING FROMWHERE YOU ARE CALLING FROM  WHERE THE FIRE ISWHERE THE FIRE IS  ONLY IF IT IS SAFE TO DO SO -ONLY IF IT IS SAFE TO DO SO - INFORM THE OPERATOR IF YOU AREINFORM THE OPERATOR IF YOU ARE MAKING AN ATTEMPT TO EXTINGUISHMAKING AN ATTEMPT TO EXTINGUISH THE FIRETHE FIRE
  8. 8. ONLY TACKLE A FIRE IF IT ISONLY TACKLE A FIRE IF IT IS SAFE TO DO SOSAFE TO DO SO  LEAVE THE BUILDING BY THELEAVE THE BUILDING BY THE NEAREST EXIT.NEAREST EXIT.  CLOSE DOORS/ WINDOWS ONLY IFCLOSE DOORS/ WINDOWS ONLY IF SAFE TO DO SOSAFE TO DO SO  GO TO THE FIRE ASSEMBLY POINTGO TO THE FIRE ASSEMBLY POINT  AWAIT THE FIRE SERVICEAWAIT THE FIRE SERVICE
  9. 9. REMOVE ONE OR MORE OF THE ELEMENTSREMOVE ONE OR MORE OF THE ELEMENTS REQUIRED TO SUSTAIN COMBUSTION AND THE FIREREQUIRED TO SUSTAIN COMBUSTION AND THE FIRE WILL GO OUTWILL GO OUT
  10. 10. Fire ExtinguisherFire Extinguisher Portable device used to put out fires of limitedPortable device used to put out fires of limited size. Such fires are grouped into four classes,size. Such fires are grouped into four classes, according to the type of material that is burning.according to the type of material that is burning.  Class A fires include those in which ordinaryClass A fires include those in which ordinary combustibles such as wood, cloth, and papercombustibles such as wood, cloth, and paper are burning.are burning.  Class B fires are those in which flammableClass B fires are those in which flammable liquids, oils, and grease are burning.liquids, oils, and grease are burning.  Class C fires are those involving live electricalClass C fires are those involving live electrical equipment.equipment.  Class D fires involve combustible metals such asClass D fires involve combustible metals such as magnesium, potassium, and sodium. Each classmagnesium, potassium, and sodium. Each class of fire requires its own type of fire extinguisher.of fire requires its own type of fire extinguisher.
  11. 11.  Some extinguishers will put out only oneSome extinguishers will put out only one class of fire; others are used for two orclass of fire; others are used for two or even three classes; none is suitable for alleven three classes; none is suitable for all four classes.four classes.
  12. 12.  Fire extinguishers may go unused forFire extinguishers may go unused for many years, but they must be maintainedmany years, but they must be maintained in a state of readiness. For this reason,in a state of readiness. For this reason, periodic inspection and servicing areperiodic inspection and servicing are required, and that responsibility rests withrequired, and that responsibility rests with the owner. Local Authority Fire departmentthe owner. Local Authority Fire department inspectors check at periodic intervals toinspectors check at periodic intervals to see that extinguishers are present wheresee that extinguishers are present where required by law and that they have beenrequired by law and that they have been serviced within the specified time period.serviced within the specified time period.
  13. 13. Class A fire extinguishersClass A fire extinguishers  Class A fire extinguishers are usuallyClass A fire extinguishers are usually water based. Water provides a heat-water based. Water provides a heat- absorbing (cooling) effect on the burningabsorbing (cooling) effect on the burning material to extinguish the fire. Stored-material to extinguish the fire. Stored- pressure extinguishers use air underpressure extinguishers use air under pressure to expel water.pressure to expel water.
  14. 14. EXTINGUISHERS FOR CLASSEXTINGUISHERS FOR CLASS B FIRESB FIRES Class B fires are put out by excluding air, byClass B fires are put out by excluding air, by slowing down the release of flammableslowing down the release of flammable vapoursvapours,, or by interrupting the chain reaction of theor by interrupting the chain reaction of the combustion.combustion. Three types of extinguishing agents —Three types of extinguishing agents —  carbon dioxide gas,carbon dioxide gas,  dry chemical (powder)dry chemical (powder), and, and  foamfoam are used for fires involving flammable liquids,are used for fires involving flammable liquids, liquefiable solids, greases, and oils.liquefiable solids, greases, and oils.
  15. 15.  Carbon dioxide is a compressed gas agentCarbon dioxide is a compressed gas agent that prevents combustion by displacing thethat prevents combustion by displacing the oxygen in the air surrounding the fire.oxygen in the air surrounding the fire. (CAUTION, DO NOT TOUCH THE HORN(CAUTION, DO NOT TOUCH THE HORN OR BASE OF THE EXTINGUISHEROR BASE OF THE EXTINGUISHER DURING DISCHARGE AS THEY BECOMEDURING DISCHARGE AS THEY BECOME EXTREMELY COLD)EXTREMELY COLD)
  16. 16.  The two types of dry chemical extinguishers include oneThe two types of dry chemical extinguishers include one that contains ordinary sodium or potassium bicarbonate,that contains ordinary sodium or potassium bicarbonate, urea potassium bicarbonate, and potassium chlorideurea potassium bicarbonate, and potassium chloride base agents;base agents;  The multi-purpose, dry chemical type extinguishersThe multi-purpose, dry chemical type extinguishers contains an ammonium phosphate based powder. Thecontains an ammonium phosphate based powder. The multi-purpose extinguisher can be used on class A, B,multi-purpose extinguisher can be used on class A, B, and C fires.and C fires.
  17. 17.  Most dry chemical extinguishers useMost dry chemical extinguishers use stored pressure to discharge the agent,stored pressure to discharge the agent, and the fire is extinguished mainly by theand the fire is extinguished mainly by the interruption of the combustion chaininterruption of the combustion chain reaction.reaction.
  18. 18.  Foam extinguishers use an aqueous filmFoam extinguishers use an aqueous film forming foam (AFFF) agent that expels aforming foam (AFFF) agent that expels a layer of foam when it is dischargedlayer of foam when it is discharged through a nozzle. It acts as a barrier tothrough a nozzle. It acts as a barrier to exclude oxygen from the fireexclude oxygen from the fire
  19. 19. EXTINGUISHERS FOR CLASSEXTINGUISHERS FOR CLASS C FIRESC FIRES  The extinguishing agent in a class C fireThe extinguishing agent in a class C fire extinguisher must be electrically non-extinguisher must be electrically non- conductive. Both carbon dioxide and dryconductive. Both carbon dioxide and dry chemicals can be used in electrical fires.chemicals can be used in electrical fires. An advantage of carbon dioxide is that itAn advantage of carbon dioxide is that it leaves no residue after the fire isleaves no residue after the fire is extinguished. When electrical equipmentextinguished. When electrical equipment is not energized, extinguishers for class Ais not energized, extinguishers for class A or B fires may be used.or B fires may be used.
  20. 20. EXTINGUISHERS FOR CLASSEXTINGUISHERS FOR CLASS D FIRESD FIRES  A heat-absorbing extinguishing medium isA heat-absorbing extinguishing medium is needed for fires in combustible metals.needed for fires in combustible metals. Also, the extinguishing medium must notAlso, the extinguishing medium must not react with the burning metal. Thereact with the burning metal. The extinguishing agents, known as dryextinguishing agents, known as dry powders, cover the burning metal andpowders, cover the burning metal and provide a smothering blanket.provide a smothering blanket.
  21. 21.  The extinguisher label gives operatingThe extinguisher label gives operating instructions and identifies the class, orinstructions and identifies the class, or classes, of fire on which the extinguisherclasses, of fire on which the extinguisher may be used safely.may be used safely. USING THE WRONG EXTINGUISHERUSING THE WRONG EXTINGUISHER CAN BE DANGEROUSCAN BE DANGEROUS The extinguisher labelThe extinguisher label
  22. 22. Under EC directives all new extinguishers are colouredUnder EC directives all new extinguishers are coloured REDRED a coloured band will identify the type of extinguisher,a coloured band will identify the type of extinguisher, READ THE INSTRUCTIONSREAD THE INSTRUCTIONS New extinguishers WATER FOAM POWDE R CO2 WATER FOA M AFFF POWDER CO2
  23. 23. OLD STYLE COLOUREDOLD STYLE COLOURED EXTINGUISHERSEXTINGUISHERS WATER FOAM AFFF POWDER CO2
  24. 24. THE ENDTHE END Muhammad Iqbal Khan SS Biology Email ID:mikhan1313@yahoo.com 0923135448175

×