Presentation

on Portable Fire Extinguishers

By S.C.Mohanta,

Chief Manager ( Safety)

Fire – Very useful and essential thing for

human. Required from the very birth till the

last journey. Present day life can not be thought of

without fire. But when uncontrolled, it becomes a

dangerous and devastating foe.

Fire – It is primarily a chemical reaction. In this, combustible materials

combine chemically with oxygen in air to form new compounds.

It is an exothermic reaction. Generates a lot of heat and flame

in the process.

Fire – Essentially three main constituents

are required to start a fire. Fuel, Oxygen or air and Heat. When above three ingredients

come together in right proportion, a fire starts.

It is obvious that Fuel and air will always be there.

Hence, the controllable constituent is heat.

The main thrust in any fire prevention programme will be to control the heat.

FIRE TRIANGLE

Removal of Heat - Cooling

Removal of Oxygen – Blanketing/Smothering

Segregation of Fuel - Starvation

How – Proper design parameters, Methodic implementation, Systematic operation, Training, Periodic checks, Disaster Management Procedures,

Main Reasons – Electrical equipments, Smoking, Open Flames, Hot works, Statical electricity, Friction,

Fire classification – Class A – Combustible solids, Paper, Wood, Coal, PVC etc., Class B – Flammable liquids, semi-

solids, Petrol, Diesel, Kerosene, Varnish,

Paint, Grease etc.

Class C – Fire from gases LPG, Hydrogen, Ammonia etc. Class D – Fire from special metals, Sodium, Potassium etc.

Fire Fighting Techniques – Cooling – Hydrants, Water type fire extinguishers, Blanketing or Smothering - Foam Type, Carbon Dioxide type fire

extinguishers, Starvation – Segregation, Isolation of

fuel,

Different type of Fire Extinguishers –

Water – CO2 Type – 9 ltr. – IS 940, 50 ltr. – IS 13385, Dry Chemical Powder Type – - 1,2,5,10 Kg - IS 2171, - 25, 50, 75 Kg. – IS 10658,

Carbon Dioxide Type – - 2,4.5,6,8,22, 45 Kg. – IS 2878.

Hydrant System,

Emulsifier System,

Technical Specification

Water CO2 Store

Pressure Water CO2 Water CO2

Capacity (In Ltr.) 9 9 50

IS Specification 6234 940 13385Jet Range (In Mtrs.) <6 <6 10

Discharge Time (In Sec.) 60-90 60-120 60-180

Min. Discharge Quantity 95% 95% 90%

Seal of Approval ISI ISI -

Hydraulic Test Pressure of Cylinder (Kg./Cm2)

30 30 30

Technical SpecificationCapacity (In Kg.) 5 10 25 50 75IS Specification 2171 2171 1065

81065

81065

8Jet Range (In Mtrs.) 4-5 <6 <6 8-10 10-

12Discharge Time (In Sec.)

15-20

25-30

25-30

40-50

50-60

Min. Discharge Quantity 90% 90% 85% 85% 85%Seal of Approval ISI ISI - - -Hydraulic Test Pressure of Cylinder (Kg./Cm2)

30 30 30 30 30

Technical SpecificationCapacity (In Kg.) 2 3 4.5 6.5 9 22.5

IS Specification 2878 2878 2878 2878 2878 2878

Jet Range (In Mtrs.) 2 2 2.5-3

2.5-3

2.5-3

2.5-3

Discharge Time (In Sec.)

14-16

16-18

20-24

25-30

30-35

50-60

Min. Discharge Quantity 98% 98% 98% 98% 98% 98%

Hydraulic Test Pressure of Cylinder (Kg./Cm2)

250 250 250 250 250 250

Working Pressure (Kg./Cm2)

60-65

60-65

60-65

60-65

60-65

60-65