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Exploding air tank theory


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#1 **armor**

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Posted 11 January 2009 - 12:49 PM

Okay, not that I don't believe Mike, but could you do an experiment and publish the findings of your research to the paintball community. I have a friend who does not believe that the pressure could set off your tank like a molotov cocktail.

Just a thought.

#2 brycelarson

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Posted 11 January 2009 - 12:54 PM

I'm not interested in testing anything that can kill me.

Sorry, this one is outside our scope at this point. I would suggest contacting the manufacturer of most of the tanks we use - Luxfer.

Luxfer gas cylinders

#3 SOUP

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Posted 11 January 2009 - 12:58 PM

kinda like this tank maybe?


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#4 Lord Odin

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Posted 11 January 2009 - 01:06 PM

I'm not interested in testing anything that can kill me.

Sorry, this one is outside our scope at this point. I would suggest contacting the manufacturer of most of the tanks we use - Luxfer.

Luxfer gas cylinders


Exactly, it's way too dangerous and expensive to test something like that. I'd reserve that for the Mythbusters. Here's my request video for them:



Note: This is just to have them prove the extremes and/or give entertainment value.

kinda like this tank maybe?

The regulator on that tank just broke off and turned it into a missile. It didn't explode like we keep hearing about.

#5 SABRE

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Posted 11 January 2009 - 01:13 PM

It's science, isn't it? How does your friend not believe that high pressure can cause combustion if a combustible material is present. I think a lot of paintballers take the pressure lightly because it's something they use on a daily basis. My full 4500psi tank actually scares me. That is A LOT of pressure, theoretically isn't it over 300,000 pounds of pressure in a 68ci? I'm not great with conversions.
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#6 Canadian_baller

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Posted 11 January 2009 - 01:31 PM

High pressure is what causes combustin is desel engines, therefore any petrolieum product in your tank will detonate. Causing serious harm to to anyone around it
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#7 Tucan9999

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Posted 11 January 2009 - 01:47 PM

When there is Pressures THAT high there is heat... When there is heat there is fire... When there is oil and fire there is BOOM!!! thats to put it simply....
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#8 brycelarson

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Posted 11 January 2009 - 02:12 PM

When there is Pressures THAT high there is heat... When there is heat there is fire... When there is oil and fire there is BOOM!!! thats to put it simply....


well, it's not the pressure BEING that high that causes heat. There's no more than ambient heat in your tank when it's full. The issue comes in when you fill the tank. Increasing the pressure increases the temperature. So, the possibility for explosion happens at the moment that it's being filled.

#9 cockerpunk

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Posted 11 January 2009 - 03:14 PM

the called auto-ignition, and many are here when they say a diesel engine uses it.

when you compress gases, they tend to get hotter. this is why compressors always have intercoolers, and such to keep the gas cool, so its easier to compress. turbos in cars work the same way.

as you compress the gas, its get really hot, and if there is anything that will oxidize in the tank, it will ignite.
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#10 Kitty

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Posted 11 January 2009 - 03:30 PM

ask those people with stako tanks.

a couple of them have gone up

#11 Snipez4664

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Posted 11 January 2009 - 05:33 PM

Diesels run at what, 25:1 maybe? Without considering the octane (or cetane, resistance to detonation at any rate) number of gun oil, tanks are compressed to (4500/15) 300:1. Seems reasonable to me to expect the combination of heat and pressure could cause an explosion, especially if the oil was just aerosolized via the fill nipple.
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#12 Poe

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Posted 11 January 2009 - 10:27 PM

When there is Pressures THAT high there is heat... When there is heat there is fire... When there is oil and fire there is BOOM!!! thats to put it simply....


well, it's not the pressure BEING that high that causes heat. There's no more than ambient heat in your tank when it's full. The issue comes in when you fill the tank. Increasing the pressure increases the temperature. So, the possibility for explosion happens at the moment that it's being filled.


The combustion will occur once the product of heat and pressure exceed a limit. In other words you could ignite the oil even if it was reasonably cold.... so long as the pressure was high enough.

Oil between tank and marker might only be pressurized to 800psi, but that's more then enough pressure at room temperature to ignite some lubricants.

#13 brycelarson

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Posted 11 January 2009 - 10:53 PM

The combustion will occur once the product of heat and pressure exceed a limit. In other words you could ignite the oil even if it was reasonably cold.... so long as the pressure was high enough.

Oil between tank and marker might only be pressurized to 800psi, but that's more then enough pressure at room temperature to ignite some lubricants.


I want to be clear here - we're not talking about any danger of a gun going off. We've been using paintball guns for going on 20 years with oil - and it's never been a problem. the 800-ish operating pressure of even the higher-pressure guns aren't a danger. 4500 psi tanks are what we're talking about here.

#14 Poe

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Posted 12 January 2009 - 12:15 AM

The combustion will occur once the product of heat and pressure exceed a limit. In other words you could ignite the oil even if it was reasonably cold.... so long as the pressure was high enough.

Oil between tank and marker might only be pressurized to 800psi, but that's more then enough pressure at room temperature to ignite some lubricants.


I want to be clear here - we're not talking about any danger of a gun going off. We've been using paintball guns for going on 20 years with oil - and it's never been a problem. the 800-ish operating pressure of even the higher-pressure guns aren't a danger. 4500 psi tanks are what we're talking about here.


Sorry if it sounded like I was saying a marker would catastrophically explode if lubed incorrectly. Markers are designed well enough that the worst anyone has to worry about is a leaky seal.

I was just trying to say high pressure is enough to cause ignition without additional heat. And some 'oils' have low enough flash points they can ignite at room temperature when pressurized with an oxidizer to 'as little as' 800psi.

800PSI is definitely enough to cause something like sewing machine oil to ignite. Also, ignite isn't detonate. Just because the oil is burning doesn't mean there will be a detonation/explosion.

I could place a couple drops of sewing machine oil in the filter of my old Spyder Compact and watch my HPA guage slowly rise as the oil first evaporates then burns. Not recommended..just saying.

#15 chewiestmonkey

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Posted 12 January 2009 - 12:51 AM

duuude 800 psi isnt enough pressure to cause any kind of paintball oil to ignite, people have been putting oil through their asa sc\ince paintball guns had asa's.

but maybe sewing machine oil, idk... that stuff is a realy really thin oil, isnt it?
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#16 CanadianBigGame

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Posted 12 January 2009 - 02:58 AM

Hell a pile of rags soaked in oil will burst into flames in your garage, not take that oil and put it under 4500psi KABOOM
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#17 REMER

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Posted 12 January 2009 - 03:24 AM

i am would love to see a video of the results but who ever tests it needs to make sure they stay safe cause it is a bomb if it does go up

#18 brycelarson

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Posted 12 January 2009 - 09:32 AM

Alright, this has turned back into "i am would love to see a video of the results" - I'm closing this thread.

NEVER PUT OIL INTO HIGH PRESSURE CONTAINERS.

DO NOT ATTEMPT TO "SEE WHAT HAPPENS"

DO NOT TEST THIS AT HOME!




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