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Thread: R134a

  1. #1
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    Wink 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



  2. #2
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    Re: R134a

    Quote Originally Posted by terminator
    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
    The following is from MSDS :

    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.

  3. #3
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    Re: R134a

    Thanks for that.....

  4. #4
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    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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