BLEVE (Boiling Liquid Expanding Vapor Explosion) Demonstration - How it Happens Training Video

[coolcj107]

great learning tool

[JenkyBoom]

if the guy on a buffalo was there is would just put it out

[xXDEICIDE216Xx]

Good fellow AFB. I remember watching this going through the program.

[eltonjohnfan100]

my asshole just grabbed my chair

[JeepGuy80]

Like my BIC?

[vasehovno]

excellent ! I would also like if they always show what is left after explosion in a same spot.

[ilovetheninetiesssss]

wow

[minneiskian]

My dad warned me about these. Except he used the acronym Blows Little Excited Volunteers Everywhere!

[76vannelle]

nice& accurate subtitles!

[blinko656]

I was involved in one of these at a paint store fire in 79. Same size tank There were about 20 Firefighters close to the tank, probably 50'. Investigators later said all of us should have died. None of us felt any heat, we just saw a huge white flash as if someone took a camera flash in front of your face. I think it was a miracle for sure.. San Carlos Paint Store Fire Dec 1979…

Lucky to be alive.

[MrTarantula887]

wtf for that safety valve did not stayed opened. there will be no explosion. just flame in the air

[BarneySaysHi]

Too bad they didn't have a high speed camera filming it.

[Ninjaproness]

1 person had to wreck the dislike bar didnt they

[poshkidsmum]

The problem about "making a weak part on the bottom" is not that the pressure is too high for the tank: it is that when the tank gets hot, the metal becomes so weak that it is incapable of sustaining normal pressure inside. (The pressure is kept down by the pressure relief valve). The tank will ALWAYS burst at the top, because that is the part that is not cooled by the liquid inside boiling and taking the heat away. .

[sleepingeye]

@lHustonProductionsl

yeah the fireball is unavoidable, but you wouldn't have metal parts flying through the air, only in the ground, and maybe the tank as a whole would propel a few meters in the air.

[sleepingeye]

They should consider constructing tanks which have a weak part on the bottom, so when it explodes, only the bottom shoots out, and not the sides.

[Zalamedas]

yeah.. and the flame the valve pushes off doesn't make any damage. I know it's better than exploding. But still not safe.

[1971SuperLead]

Why not bury LP tanks then?

[ffjsb]

@1971SuperLead They are starting to do that, but it costs more. And they can't be buried in every location for different reasons.

[1971SuperLead]

@ffjsb Oh, awesome!

[ffjsb]

@1971SuperLead I'd like to get a new tank and bury it because the old tank looks like crap and is a pain to mow around. Not too much worried about fire, there's no ignition sources that are really close.

[1971SuperLead]

@ffjsb Falling debris from space might be a concern! Bury it now!

[Treblaine]

Bobbeh, now you understand the power of Propane and Propane Accessories.

[yesiamanalien]

wonder what would happen if the relief valve failed to work lol

[Mpayne]

Hey at least the explosion put the fire out XD

[TexRay940]

the tank being on fire for 20 minutes isn't warning enough?

[chaosk1]

releaf valve... you mean ilke at 0:18?

[drchen054]

why wasn't the relief valve opening to help prevent the explosion when the vapor was being cooked by the overheated metal?

[halleffect1]

@drchen054 that's a good question.

[drchen054]

@halleffect1 oh now that I look at it, it was venting, but it just wasn't fast enough probably.

[markgriz]

Did you watch the whole video?

They explain pretty clearly what happens, the heat weakens

the metal so it ruptures, apparently at a pressure lower than

what the relief valve is set for.

[idgarad]

@drchen054 insufficient pressure. If the value goes off at a given PSI, but there isn't enough liquid or vapor inside to reach that pressure, the valve can't open. So the empty space inside is too large after enough is vented that sufficient pressure can't be generated to trigger the relief valve. You can simulate this with a tea kettle. Put enough water in and heat it and you will get a whistle. Put too little in and the water vapor can't generate enough pressure to whistle.

[JokerWhySoSeriousHa]

i had to learn about this in Fire college i think they showed us this video i know they showed us the one with the train cart

[1nm1]

Excellent video