Classes and Stages of Fire
 

"Fire is categorized into different classes based on the materials that are burning".

                  Classes of Fire 🔥 

 

                          Class A

These are fires involving ordinary combustibles such as wood,paper, cloth and some plastics.

                          Class B

These are fires involving flammable liquids gases or grease such as gasoline,oil,paint,and solvent.  

                           Class C

These are fires involving electrical equipment such as appliances,wiring and circuit breaker.

                           Class D

These are fires involving combustible metals such as magnesium,titanium, sodium and potassium.

                           Class K

These are fires involving cooking oils and fats,typically found in commercial  kitchens.

                     Stages of Fire 🔥

 

                     Ignition Stage

This initial stage involves the heat necessary to raise the temperature of the fuel to it's ignition point.

Ignition can occur through various means such as a spark,open flame,or other sources of heat.

                    Growth Stage

Once ignition occurs,the fire enters the growth stage during this phase,the fire starts to spread.

Fueled by available combustible materials and oxygen,the flame grows larger,heat is produced,and smoke begins to develop.

          Fully Developed Stage

At this point,the fire reaches its peak to ignite additional nearby fuels and the fire spreads rapidly(through radiation,conduction or convection).

This stage can be categorized by large flames significant heat release and substantial smoke production.

                      Decay Stage

In this stage,the fire begins to diminish as available fuel is consumed and oxygen is depleted.

The flame may decrease in size and intensity,leading to cooler temperature and reduced smoke production.

If additional fuel or oxygen is not introduced the fire will continue to dwindle or go down.

 

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