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<p>One must hope that the standards for allowable leakage from an
A/C system are as tight as for fuel systems...as I recall, the old
R-12 systems usually had 2-3 lbs of refrigerant. A couple pounds
of propane would make a pretty good fuel-air bomb, worst case...or
an underhood blowtorch with a broken line spraying. Neither are my
idea of a good time - and, unlike gasoline, diesel, or alcohol, a
Freon-compatible refrigerant is self-propelling. Of course, the
same is true of a gaseous fuel, whether natural gas, hydrogen, or
propane. <br>
</p>
<p>Not sure about disposing of gasoline...if you live in an area
that has a 'household hazardous waste' collection point, they
might take it a gallon or so at a time. I wouldn't bet that they'd
want 10+ gallons in one whack, though. 5 year old gasoline might
be ok to burn in a tractor or truck, especially if diluted. Is
that a 'gas tank full' like a 100 gallon farm gas barrel, or a
full tank of gas in the old Case? <br>
</p>
<p>I've never had any trouble disposing of anything at a household
waste collection - old solvents, aged paint, dead fluorescent
lights, including those I *knew* contained mercury; they've always
taken everything. I think they do draw the line at low-level
radioactive waste, but the only bits of that I've ever had have
been in microcurie amounts in old smoke detectors.<br>
</p>
<p>Mark J<br>
</p>
<div class="moz-cite-prefix">On 1/14/2019 8:15 AM, Ken Knierim
wrote:<br>
</div>
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cite="mid:CACLRkA+=diF0JRQX7Tstm+GRB-z9tB62kdQ3VO1bOY_5AYF+hA@mail.gmail.com">
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<div dir="ltr">How much more flammable than fuel are these
refrigerants? Vehicles are fueled by propane, gasoline, alcohol,
natural gas, batteries and in some cases, hydrogen. Seems that
stored energy is there regardless... and from my meager
understanding, there isn't a whole lot of flammable material in
the A/C systems when using these types of refrigerants.
<div><br>
</div>
<div>One other thing, probably more useful to me... what's the
safe method of disposing this newer gasoline when it goes bad?
I've got a gas tank full of 5+ year old gas that I need to
find a home for. I can't burn that much in my old Case
tractors because I don't run them very much anymore.</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Ken in AZ </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Sun, Jan 13, 2019 at 6:58 PM Steve W. <<a
href="mailto:swilliams268@frontier.com"
moz-do-not-send="true">swilliams268@frontier.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Mark
Johnson wrote:<br>
> There is one problem with Red Tek 12A - which you already
touched <br>
> on...flammability. The propane+n-isobutane mix has been
known for a good <br>
> many years - it has all the same useful properties as
R-12 - almost <br>
> identical eutectic curve, carries oil through the system,
and so on. My <br>
> dad (a 1950 engineering graduate) apparently took a
'practical <br>
> thermodynamics' course where they spent a lot of time
studying <br>
> properties of gases that would be useful as refrigerants.
Even as early <br>
> as the late 1940's, hydrocarbon gases like propane were
known to be <br>
> useful - but the available gasket and seal technology
meant that they <br>
> were too hazardous to use in commercial environments. [As
an engineer, <br>
> Pop was responsible for maintaining the chiller systems
for milk and ice <br>
> cream production at a dairy plant, from about 1952 to
1963.] Propane <br>
> might have been better than ammonia, even then - but
small ammonia leaks <br>
> are easily detectable, and the stuff doesn't explode!<br>
> <br>
> I can remember when those 14 oz cans of R-12 were 59
cents at <br>
> K-Mart...the stuff was cheaper than bottled water.
Anybody who could <br>
> read a gauge set and turn a wrench could recharge their
own A/C - which <br>
> no doubt contributed to the 'escape' problem, as it was
cheaper to <br>
> recharge the system once a month than to go get it fixed.<br>
> <br>
> Mark J<br>
<br>
That's why it is illegal to use. The guy who was pushing the
stuff back <br>
then managed to blow himself up while demonstrating how "safe"
the stuff <br>
was..<br>
<br>
<br>
-- <br>
Steve W.<br>
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