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| Re: [GMCnet] Propane safety was Jim and Marlys Coach Pictures [message #83454 is a reply to message #82820] |
Fri, 07 May 2010 09:59   |
emerystora
Messages: 4442
Registered: January 2004
Karma:
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Senior Member |
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On May 2, 2010, at 6:19 PM, Rob Mueller wrote:
> G'day,
>
> I agree with Emery.
>
> I have a 2 way (120 VAC & LPG) Dometic fridge in Double Trouble. I just
> checked the Camping World website and it is still available. I then checked
> the on line manual for it and it does not say to turn it and the LPG off
> when the vehicle is underway. Furthermore considering today's litigious
> society I can't understand why a company would make a 2 way fridge if
> driving it with it running and the LPG on was dangerous.
>
> When I was getting Double Trouble ready for our first tour at Ken Frey's
> shop I inspected all the lines carefully for signs of chafing, stress at the
> bends, and cracks. I disassembled the flared joints, slid the nuts up the
> line, and checked the start of the flair at the line. When I re-assembled
> the lines I was careful not to over-tighten the flare nuts. IIRC the rule of
> thumb is finger tight plus 1/4 turn (or is 1/8 turn - you better look that
> up)! I then leak checked the entire system with bubble soap. I checked the
> LPG system again last year (didn't disassemble the flares) when I got Double
> Trouble ready for our tour and will continue to do so each year.
Here is a bit more information on propane:
Propane is a relatively safe product. Like gasoline, propane is flammable, but has a much narrower range of flammability than gasoline and much higher ignition temperature 920- 1020 degrees vs. 80- 300 degrees for gasoline. Propane will only burn with a fuel-to-air ratio of between 2.2% and 9.6% and will rapidly dissipate beyond its flammability range in the open atmosphere-making ignition unlikely. Propane, unlike gasoline, is heavier than air and in the event of a leak it will flow downward rather than up toward a ingntion source.
The ignition temperature is the temperature at which a fuel will ignite without the need for a spark or flame.
Propane has the lowest flammability range of any of the commonly available fuels. The flammability range is the percentage of propane in air from the lowest to the highest that will burn.
Emery Stora
77 Kingsley
Santa Fe, NM
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