Skip to comments.Hazmat Highway to Hell with Oxygen Cylinders
Posted on 02/12/2014 7:29:53 AM PST by Doogle
Great Icebreaker video for a HAZMAT Class demonstrating the dangers of insecure high pressure cylinders in a highway accident. This was an accident that occurred in Russia. Russians have dashcams in order to provide additional evidence in court due to guard against police corruption and insurance fraud. This version contains no music.
(Excerpt) Read more at youtube.com ...
Those weren’t oxygen cylinders...
Let’s be clear.
OXYGEN neither burns nor explodes. Ever.
Oxygen is the oxidizer (duh) in a fire like this.
Compressed flammable gasses are the fuel here, as well as initially likely the fuel of the truck and the bus it ran into.
REM: I am a former firefighter.
Google BLEVE and Class B fires.
Oxygen does NOT burn.
More than likely the cylinders were welding equipment blends of gases.
Oxygen is required for combustion, but if you hold a lit match in a room full of pure oxygen nothing will blow up. You might burn your fingers though as the match would burn very hot and very fast.
Indeed. If you can make oxygen “burn” you are a great alchemist or a ‘nuculer’ physicist.
looks more like acetylene than oxygen
What was that cop thinking?
“I’m too close”
...not my comment...*smiles*
definitely some eye popping goodness.
watched it twice... just as much fun the second time.
if fireworks were more like this, then maybe I’d find them more exciting ;)
Why won't this f***** car start ?
Of course oxygen doesn’t burn, BUT it increases the burn rate of any fuel by logarithmic numbers......
Just use a leaf blower on a leaf fire, and you’ll see an example. You’re adding oxygen, not fuel.
Oxygen is part of the combustion process, and to make any fuel burn faster - add oxygen. Adding oxygen will increase the burn rate many times more than adding fuel.
So, these could have been oxygen cylinders.
Hmmmm....wonder why all the shuttles had liquid oxygen tanks to fire the engines?
Because adding oxygen increases the combustion process more than adding fuel.......
..driver got out of there in a hurry...
Oxy tanks in NA are green. These were orange.
Anybody know if that protocol is used over there?
BTW nice job by the following car to get stopped quickly to avoid.
The Current FReepathon Pays For The Current Quarters Expenses?
We use the first cop laying on the ground to mark the hot zone. (^;
FWIW a full acetlene cylinder is at about 250psi and an O2 is about 2300
I have seen home O2 cylinders stuck through the wall after a fire. As the left the apartment, they looked like rockets as the aluminum burned.
I think it was the engineering department of Purdue which had competitions to quickly light a grill full of charcoal at their annual picnic. The competition was cancelled after they used charcoal, a lit cigarette for ignition and a container of liquid oxygen: the grill disappeared in the resulting fire.
Those videos were great! Surely they’ve made it to YouTube by now.
Too bad this was pre-ubiquitous HD cameras.
Those are low pressure cylinders filled with a flammable gas. Definitely not oxygen cylinders.
Several years ago, a bottle plant in the DFW area caught fire and the bottles were taking off like bottle rockets. I forgot how far the farthest one flew, but the video of that was scary.
No, not really. Look at the video again. You’ll see sevaral times some tanks with pressurized flames shooting out of their tops. Those are tanks where the valves at the top have failed due to pressure build up and heat.
The big balls of flame occur from explosions of suddenly released gas from tanks that have failed.
Truly - no harm no foul - go read about BLEVE.
Most likely there were some ‘oxygen’ tanks on that truck - as oxyacetylene sets.
But as someone who has attacked some pretty interesting and intense Class A/ B/ D fires in vehicle wrecks, I can assure you, oxygen tanks weren’t my big concern.
Those explosions you saw were typical to a gas release into a normal atmosphere.
I can’t read Russian, and the video was too blurry to read the labels and colors on the tanks as the truck passed the car, but ... that was by far primarily first a burning fuel fire (class B) followed by a BLEVE (special Class B fire)with maybe a little Class D and surely Class A thrown in for fun.
As I watched the video, what I saw was NOT any “detonations” of the taller, industrial gas cylinders (that RARELY happens) and the debris flying was from what looked like bit and pieces of truck - plus some cylinders flying in the air. THAT is all normal.
Ya gotta let it go. The title is misleading to anyone who has ever put on turnout gear.
If ya don’t know what turnout gear is, and why you never wear polyester T-shirts, then you probably should go with me here ;-)
I remember it...
yeah I know...
The shuttle had two types of rocket motors, with two types of fuels, and two types of oxidants to produce either a programmed or controllable burn.
The solid rocket boosters on the side combined fuel and oxidizer in the ‘solid’ fuel molded into the tube of the booster. Absent that chemistry, there ain’t enough O2 in the upper atmosphere to burn the fuel at a rate sufficient to generate thrust. Once lit, that booster is gonna burn until the compound ‘fuel’ is exhausted.
The main motors on the shuttle could be throttled as they used both liquid fuel (I forget the name) and liquid oxygen. They could power up and power down those motors. No way to do that on the boosters.
So much for the technology discussion.
Let me go back to this — the explosions you saw in that video were typical of a gas released into a normal atmosphere. Sure there could have been some O2 released from leaking cylinders, but O2 NEVER goes boom.
NET: the title was misleading or wrong.
Thank you Clay for correctly pointing out the AL was the fuel — a Class D fire.
O2 NEVER burns unless we are talking nuclear fires, and we ain’t.
The Oxygen cylinders are pressure-propelled when the top valve is broken off or otherwise fails.
IIRC, Hydrogen and other flammable gases are in yellow and orange, but sometimes only the caps mattered. It’s been 20 years ...
Green was always O2 for medical applications.
Over there, there’s no telling. ;-)
My **GUESS* is that this guy supplied industrial gases from a local distributor, so he was hauling oxy-acetylene, rare gases and maybe some propane for forklifts. The small propane tanks I (in the past) I saw light up looked a lot like the ‘explosions’ in that video.
Sorely disappointed in this factoidal disclosure.
Liquid Hydrogen was the fuel.
I found this video. Just over 10 minutes long.
interesting. I knew it was hydrazine in the thrusters. Couldn’t recall the main motors’ fuel.
ZERO ‘pollution’ using H2. Ya just make water vapor. Oh wait, THE *MOST* powerful greenhouse gas is water vapor ;-)
Except the H2 is made by steam reforming Natural Gas.
Nobody has found an H2 tree for harvesting zero pollution fuel.
It is like claiming an Electric Car is zero pollution by ignoring most of the Electricity is made from Coal and Natural Gas.
Oh I agree. I failed to add the sarcasm tag.
Ok, assuming that it is agreed that adding oxygen to a fuel fire will greatly accelerate the combustion - far more than adding an equivalent amount of fuel, how about this?
The oxygen tanks upon being overheated, burst simply because the pressure limits of the tank were exceeded. Then, immediately, a humongous amount of oxygen is added to whatever fuel is already burning.
I cannot imagine that the addition of this much oxygen so suddenly to an existing fueled fire - along with the “explosion” of the bursting tank - would not simulate an explosion.
This is why liquid oxygen is used to control the rockets in the shuttle - if it were not controlled, one would have an explosion - from the oxygen accelerating the combustion of the fuel. The rocket is in essence a controlled explosion. Most of the time. Let’s do some research on what happens when liquid oxygen tanks have burst open on a failed rocket launch. I’ll bet what happened was an explosion.
Never heard of this scenario being reproduced. Maybe Mythbusters could do it.
WHY do you even think oxygen tanks were on the truck?
I'm a RRT and know a little about 02
Good point. There may have been none.
But that wasn’t the question - at least as I saw it.
The question was what happens to any fire when a huge volume of
highly compressed oxygen is added to a fire.
I believe it would, for all practical purposes, appear the same as an explosion.
Not wanting to make a controversy or argument. Just wanting to point out a fact.
I think that this is like the Russian counterpart to the American Media’s portrayal of all rifles as AK-47’s.
All ‘tanks’ are OXYGEN tanks, no matter what is really in them. Either that or it’s just a translation problem. The original report may have said ‘compressed gas’ tanks.
Because.... the word OXYGEN is in the title of the article ?
And my point, and the point of other firefighters on this thread is that the TITLE is misleading.
OXYGEN is NOT flammable. PERIOD.
An Oxygen leak is WAY down on the list of concerns if the leak is outdoors.
The flammable/explosive gases on that truck were the cause of EVERY ‘explosion’ you saw.
The “no smoking, oxygen in use” signs are so some schmuck doesn’t have their lit cigarette burst into flames, ignite their clothes and hair etc etc.
But the OXYGEN never burns - it just helps other stuff burn or blowed up real good ;-)
BTW, your O2 cylinders are green, right? Or come out the wall from a tank elsewhere?
Yes - increasing the O2 PPM or percentage of the atmosphere does indeed accelerate combustion. The reverse is also true.
The movie BACKDRAFT demonstrated the effect of suddenly introducing O2 to a hot fuel with a source of ignition.
I ‘hated’ that movie for one reason — They portrayed Fire Fighters as stupid - going into an active, enclosed fire with their gear open, (not even a balaclava or face shield) without a buddy, and no respirator/ rebreather etc etc.
Green and 02 flow meters out of the wall have green on them.....
I think we all agree on that.
I merely noted that OXYGEN is NOT flammable. PERIOD.
Yeah... it's inflammable. (a firefighter joke).
An Oxygen leak is WAY down on the list of concerns if the leak is outdoors.
Rather like a large burst of CO2.
The flammable/explosive gases on that truck were the cause of EVERY explosion you saw.
I find that unnecessarily redundant, but at the least we can agree that the 'fuel' for those explosions was in those tanks.
It was Russia, could have been just about anything. None of those pesky signs to deal with either.
Thank you for your response.
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