R12 vs R134

[Stacy Anable]

r-12 and r-134 are not flammable by themselves. it is their respective 
lubricants that are highly flammable. r-12 does however produce phosgene gas 
when burned with is akin to mustard gas.


>From: Steve Sherman <spsherm at attglobal.net>
>Reply-To: spsherm at attglobal.net
>To: Kneale Brownson <knotnook at traverse.com>
>CC: quattro <quattro at audifans.com>
>Subject: Re: R12 vs R134
>Date: Sun, 13 May 2001 17:03:44 -0600
>
>Kneale:
>
>As I recall (this was a year or two ago) this point was raised.  The 
>answers
>that I recall are:
>
>1. A mix like this has been used in south & central america for years with
>little no statistics/reports of problems.
>
>2.  It is no worse than that tank of gas and the pressurizwed FI lines.
>
>3.  R12 and R134 are flammable too, and one of them gives off poisonous
>by-products when it burns...
>
>So yeah, it is a risk, but not one that I was very concerned about, but
>everyone should decide for themselves.  I suspect that keeping R134 as the 
>sole
>automotive refrigerant had alot more to do with it than safety...
>
>
>
>Kneale Brownson wrote:
>
> > At 08:01 PM 05/12/2001 -0600, Steve Sherman wrote:
> >
> > >Although it has been a year or two since I looked into this, I recall a
> > >company that was selling an R12 compatible replacement.  It was a
> > >mixture of propane and butane and some other unspecified gases.  There
> > >were several supposed advantages over the 134.
> >
> > Sounds sort of explosive, eh?  Propane and Butane under pressure in a 
>hot
> > environment subject to sudden impact (in a crash).  Probably the reason 
>the
> > mixture was approved only for stationary systems like refrigerators.
>

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