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PICList Thread
'[PICLIST] [OT] Gas was: [EE]: high efficiency feed'
2001\03\14@202452 by Kevin Maciunas

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On 14 Mar 2001 17:10:06 -0800, John Gardner wrote:
> Don't know what's std in the UK, but small cylinders designed to
> supply vapor CAN be inverted to draw off liquid - I fill portable
> bottles this way.
>
>      Caveat - Imperative that bottles not be over-filled.
>
> For those unacquainted with LPG, it is stored as a liquid under
> pressure. While the fire danger is nominal, dangerous pressures
> can evolve in an improperly designed, constructed, or OVER-FILLED
> system. Nothing to fool around with if you don't know what you're
> about, so make sure you do...
>


Just to add my $0.02 to this discussion - what is said above is
absolutely critical.  If you fill the container with no headspace, you
build a *powerful* bomb.  You can experience a BLEVE - Boiling Liquid
Expanding Vapour Explosion.  Having seen what a 9Kg LPG cylinder can do
in a BLEVE situation, I'd urge extreme conservatism!  Contact your local
fire brigade for information on BLEVEs if you feel uncertain, most
brigades have at least one training video showing a BLEVE.  Quite
disturbing.  Here in Australia, we have LPG powered vehicles and they
are designed for a maximum 80% fill, to permit enough headspace.  They
also have over-pressure valves etc etc.

/Kevin

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Kevin J. Maciunas              Net: spam_OUTkevinTakeThisOuTspamcs.adelaide.edu.au
Dept. of Computer Science      Ph : +61 8 8303 5845
University of Adelaide         Fax: +61 8 8303 4366
Adelaide 5005 SOUTH AUSTRALIA  Web: http://www.cs.adelaide.edu.au/~kevin

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