Why should a covered water tank explode?

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Offline warmare

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Why should a covered water tank explode?
« on: 17/05/2008 13:18:11 »
if we bring a burning match near to the water tank which is always kept covered, there is explosion. How this happens ?

thanxx
« Last Edit: 18/05/2008 21:56:48 by chris »

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Offline neilep

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Re: Why should a covered water tank explode?
« Reply #1 on: 17/05/2008 13:30:33 »
Hi warmare...welcome to the site.

That's an interesting question !....does that really happen ?...might it have something to do with a build up of oxygen between the layer of water and the enclosure of the tank I wonder ?

Hopefully an answer will come soon !
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Offline Madidus_Scientia

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Re: Why should a covered water tank explode?
« Reply #2 on: 17/05/2008 13:40:06 »
wait, what? tell me more about your water tank, it can't just an oxygen layer because it needs a fuel also to explode.

is it a rain water tank? what do you mean by covered, is it just an open tank with a roof over it? or do you mean if you take the lid off it or something and bring flame to it it explodes?

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Offline neilep

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Re: Why should a covered water tank explode?
« Reply #3 on: 17/05/2008 13:43:40 »
Could it be a tank of ' rotten water 'filled with decomposing stuff  generating methane ?
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Offline Karen W.

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Re: Why should a covered water tank explode?
« Reply #4 on: 17/05/2008 14:04:25 »
That sounds plausible...

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Offline warmare

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Re: Why should a covered water tank explode?
« Reply #5 on: 17/05/2008 15:51:59 »
we have a cement water tank in which we store water for our daily use and this water tank is always remained closed by placing it's cover over it.

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Offline lightarrow

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Re: Why should a covered water tank explode?
« Reply #6 on: 17/05/2008 20:48:30 »
we have a cement water tank in which we store water for our daily use and this water tank is always remained closed by placing it's cover over it.


Is it possible some electric short-cicuit inside the water, generatig hydrogen and oxygen by electrolisys?

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Offline Madidus_Scientia

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Re: Why should a covered water tank explode?
« Reply #7 on: 18/05/2008 08:43:08 »
Does the explosion produce a visible flame?

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Offline Bored chemist

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Re: Why should a covered water tank explode?
« Reply #8 on: 18/05/2008 13:24:57 »
Methane is by far the most likely explanation.
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Offline Madidus_Scientia

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Re: Why should a covered water tank explode?
« Reply #9 on: 18/05/2008 15:35:13 »
Indeed. you should take a good look at it, you could be drinking contaminated water

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lyner

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Why should a covered water tank explode?
« Reply #10 on: 19/05/2008 09:33:51 »
we have a cement water tank in which we store water for our daily use and this water tank is always remained closed by placing it's cover over it.

Is it possible some electric short-cicuit inside the water, generatig hydrogen and oxygen by electrolisys?

And the electrical energy source - to produce sufficient H2 and O2 for the explosion?

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Offline Madidus_Scientia

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Why should a covered water tank explode?
« Reply #11 on: 20/05/2008 02:27:42 »
If the rain runs off the roof through a gutter and filter, as it passes through possibly some decaying leaves and muck stuck in the gutter, could methane gas dissolve into the water? and then slowly evaporate out of it when its sitting in the tank? Then as water was used and more water came in more methane would leech out slowly building up enough of it to cause the explosion? When i was a boy we lived far out of town on a sugar cane farm and we had a similar setup, 2 big concrete tanks full of water that just came straight off the roof and through a very simple filter. How did you discover that it explodes near flame?
« Last Edit: 20/05/2008 02:31:28 by Madidus_Scientia »

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Offline lightarrow

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Why should a covered water tank explode?
« Reply #12 on: 21/05/2008 19:22:24 »
we have a cement water tank in which we store water for our daily use and this water tank is always remained closed by placing it's cover over it.

Is it possible some electric short-cicuit inside the water, generatig hydrogen and oxygen by electrolisys?

And the electrical energy source - to produce sufficient H2 and O2 for the explosion?

I was thinking to the possibility that the tank had some electric pump and or a valve to control the water's level.

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Offline wenger230

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Why should a covered water tank explode?
« Reply #13 on: 27/12/2010 14:20:25 »
Installing a rainwater tank is both cost effective and environmentally friendly as it will enable you to harvest rainwater from your gutters.
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« Last Edit: 27/12/2010 15:15:55 by peppercorn »