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Thread: R134a
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02-02-2006, 12:48 AM #1
R134a
Hello guys,
New here, but long in the job...
Are there any circumstances under which 134a is flammable? Someone is trying to say it is, with a certain % of air, but I've never heard this.
Thanks
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02-02-2006, 02:59 AM #2
Re: R134a
Originally Posted by terminator
HFC-134a is not flammable in air at temperatures up to
100 deg. C (212 deg. F) at atmospheric pressure. However, mixtures of HFC-134a with high concentrations of air at elevated pressure and/or temperature can become combustible in the presence of an ignition source. HFC-134a can also become combustible in an oxygen enriched environment
(oxygen concentrations greater than that in air). Whether a mixture containing HFC-134a and air, or HFC-134a in an oxygen enriched atmosphere become combustible depends on
the inter-relationship of 1) the temperature 2) the
pressure, and 3) the proportion of oxygen in the mixture. In general, HFC-134a should not be allowed to exist with air above atmospheric pressure or at high temperatures; or in an oxygen enriched environment. For example HFC-134a should NOT be mixed with air under pressure for leak testing or other purposes.
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02-02-2006, 08:14 PM #3
Re: R134a
Thanks for that.....
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03-02-2006, 11:32 AM #4
Re: R134a
Hi terminator.
Today at work I was sweating an accumulator. When I took it off and went to trow it on the ground, a 2 foot flame shot out the end.
This was 134a. But it was the oil and UV dye that caused the flame. Bloody phosgene burns the nose and eyes.
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