How a fire extinguisher works

[SpecializedChild462]

I love how the woman explains this she sounds fierceome

[FireSafetyTraining]

The dry powder is a chain breaking extinguisher it has no post fire security ie no cooling properties, the fire is still producing vapours which is the cause of the re-ignition, basic chemistry of fire as you heat a substance if it is a flammable substance as it warms it starts to produce flammable vapours which support combustion. simple peeps.

[macthefireman]

Halon is no longer used because it breaks down the Ozone layer, not because it is bad for your health. Ironically, if it is used on a fire then it causes no problem to the ozone layer, but the vast majority of the Halon that is made will eventually just be released into the atmosphere, thus the ban on it's use.

[fireworkfreak100]

@macthefireman hehe cool I still have a couple of halon extinguishers hang. but they work very well.

[Rockawall]

discovery channel is kickass

[XowntXihqX]

useless crap

[david24six]

Why re ignition? The fire load (amount of petrol and heat) is too great for the amount of fire suppressing agent. Much like pissing on a bon fire.

[TheoldseadogBob]

The flammable liquid used in the demo reignites because it has reached its auto ignition temperature.

[TheoldseadogBob]

The metal container is not cooled by the dry powder, should be followed up with foam fire extinguisher.

[david24six]

The powder breaks down at about 70 deg C and forms CO2 gas, CO2 is heavier than air/oxygen as such it pushes the O2 away from the fire.

[david24six]

obese1konobe, bugguy905 is correct, you as a pilot should know that, yes??

This vid is a simple explanation, such as the fire triangle to keep it simple. A fire consists of four elements the fire pyramid, heat, oxygen, fuel and chem. reaction, the fire industry know this.

Also, the powder is not designed to only smother the fire (we could use sand instead, much cheaper).

[Jerram89]

Is this VBH?

[Nugburner420]

and now you know

[bugguy905]

there are 4 things that a fire need 1 o2 2 fuel 3 heat and 4 a chemical reaction. most of the time it takes away the o2 some take the chemical reaction away like halon takes the chemical reaction away.

[obese1konobe]

You should write to all the fire industry research establishments around the world and tell them they have been wrong all these years.

They all seem to think there are only 3 points for fire (the fire triangle)

Good job you are here to put them right!!

[Born2killx]

But they stopped using Halon 1301 because it is bad for your health.

[lasergeak]

the fire is the chemical reaction!!

[bmxflatlander123]

i don't know that

[LonelyVietz]

i don't know that

[andygraves33]

boring

[bugguy905]

this might just save your ass learn

[blazedude9]

''i dont know that'' lol

[PhD123X]

This is wrong. MAP based powder suppresses flame via free radical inhibition, not directly by oxygen depletion.

[Killforfood]

cool

[ArchTymeWizard]

I didn't know that.

[newsafety]

good description of what a fire extinquisher is and how it stops a fire