portable fire extinguisher

45
Sahadev Nagarkoti Sr.fire officer TIA Kathmandu

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Page 1: Portable fire extinguisher

Sahadev Nagarkoti

Sr.fire officer

TIA Kathmandu

Page 2: Portable fire extinguisher

Easy to carry and operate

Saves lives and property

Early stage of development

Portable fire extinguisher

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TO CONTROL OR EXTINGUISH SMALL OR INCIPIENT STAGE FIRES

and

PROTECT EVACUATION ROUTES

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FIRE

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FIRE CHEMISTRY

• Three components

• Need all three components to start a fire

• Fire extinguishers remove one or more of the components.

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6

Principles of Fire Extinction

1. StarvationRemoval of un-burnt material from fire

area

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7

Principles of Fire Extinction

2. SmotheringCutting off the supply of oxygen from fire area

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8

Principles of Fire Extinction

3. Cooling Removal of heat from the burning

material/fire area

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1.WHAT IS BURNING?2.IS THE FIRE CONTAINED?3.WHERE IS THE CLOSEST

EXTINGUISHER?4.IS THIS THE CORRECT

EXTINGUISHER?5.WHERE IS THE EXIT IN RELATION

TO THE FIRE?

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Class C

Flammable gases

Natural Gas, Propane, CO

Class k

“Kitchen”

(Cooking Grease)

Class ACoal, Wood, Paper,

Cloth, Wax, Grease, Leather,

Plastic, Sugar, Grain, Hay,

Class B

FLAMABLE LIQUID

Gasoline, Kerosene, Turpentine, Alcohol

Class D

“Dents”

(Metals)

Class EElectric

fire

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DISCHARGE HOSE

DISCHARGE NOZZLE

DISCHARGE ORIFICE

BODY

DATA PLATE

CARRYINGHANDLE

PRESSURE GAUGE(not found on CO2

extinguishers)

DISCHARGE LEVER

DISCHARGE LOCKING PINAND SEAL

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• OLDER STYLE of labeling indicating suitability for use on class A, B, and C fires.

• NEWER STYLE of labeling that shows this extinguisher may be used on ordinary combustibles, flammable liquids, or electrical equipment fires.

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For example, a simple water extinguisher might have a label like this…

…which means it should only be used on

Class A fires.

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Dry Chemical Powder

.Water Extinguisher(

AWP) Chemical

Foam Extinguisher

Carbondioxide

Soda Acid

TYPES

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effective on fire in small quantities of flammable liquids, grease etc , that is

class B fire,

By blanketing(smothering)

also used for class A fire because of 85% of weight of extinguisher

agent is water.

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Bicarbonate of Soda

Foam stabilizing Agent

Aluminum Sulphate

T

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CHANGE AFTER USE

CHECK LEVEL(3 MONTHS)

CHANGE CHEMICALS

AFTER 2 YEARS

WASHED PROPERLY AFTER USE

EXAMINE PERIODICAL

LYMaintenance

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Stored pressure type

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CARTRIDGE TYPE EXTINGUISHER

SUITABLE FOR CLASS A FIRE

SODIUMBICARBONATE SOLUTION

ACID CARTRIDGE

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KEEP UPRIGHT

HIT THE PLUNGER

CLOSE NOZZLEAND SHAKE

PULL SAFETY PIN

EXTINGUISH THE FIRE

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Do not use in electric fire

Take care while handling the acid

If contact with eyes , immediately wash with water

After use, don’t use hand to stir the solution

Page 26: Portable fire extinguisher

CHANGE AFTER USE

CHECK LEVEL(3 MONTHS)

CHANGE CHEMICALS

AFTER 2 YEARS

WASHED PROPERLY AFTER USE

EXAMINE PERIODICAL

LYMaintenance

Page 27: Portable fire extinguisher

COLOUR LESS , ODOURLESS ,HEAVIER THAN AIR

EFFECTIVE ON CLASS A, CLASS B AND CLASS E FIRE

EXTIGUISH FIRE BY SMOTHERING

Page 28: Portable fire extinguisher

Carry to the fire by handle and operate.

Take out the safety pin .

The discharged expels a cloud of Carbon dioxide gas with some snow through the horn

.

Direct steam to the base of fire.

Don’t use in open area because the gas is easily dispatch by wind.

Page 29: Portable fire extinguisher

Don’t hold the ‘horn’ as frostbite may occur.

The discharged horn should be appointed at the base of the fire

The gas is non-toxic but concentrations of over 4% by volume in confined areas may reduce the oxygen percentage.

So ventilate all windows and doors, etc.

Don’t expose to temperature over120* F

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STORED PRESSURE

TYPE

CARTRIDGE OPERATED

TYPE

Mono ammonium phosphate +ammonium sulphate

N2 or

CO2

MULTI PURPOSE FIRE EXTINGUISHER(CLASS B,C,D ,E AND K

QUICK KNOCK DOWN

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1.The handle is pushed down and puncturing the seal disc in the cartridge.

2.The pressure expels the DCP from the container.

3. The discharged is controlled by shot off nozzle .

4.The unit must in upright position.

5.For best result ,direct discharged at the edge of fire and progress forward by sweeping motion of the nozzle.

6.Use 6 to 8 feet distance on f lammable liquid fires. Care should be taken.

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Don’t direct stream at f lammable fire

Don’t use in closed room

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1.Flash back2.Adverse visibility

3.Breathing Difficulties4.Wind influence

5.Corrosive

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Effective on class A fire

Agent is water

throw 30 -40 feet

Don’t over charged

It operates 60-120 secs

Never used for Class E fire

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LOW at the base of the fire

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the lever

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from side to side (slowly)

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WATCH the fire area

If the fire flares up again repeat!

If you can’t control the fire, LEAVE immediately!

Recharge or replace any used fire extinguisher!

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