It loaded slow for me but it's worth the time.


http://www.brewracingframes.com/id75.htm

 

R-12 will do the same thing.

 

Yes sir, refrigerant from refrigerators, freezers, Teflon...

 

A slip of a wrench on an older vehicle with a hot exhaust manifold can happen to any of us.

 

I was talking to a old timer mechanic a few years back. He said many years ago he was doing a break job while smoking a cigarette. The cleaner he sprayed sortive came back in his face and the fumes were lit by the cig. Whatever he sprayed turned into a phosgene gas when burned and it messed up his nervous system. His hands always shake and he had some other issues.

 

our service manager just posted this up on our bulletin board. good read.

 

Good to know, I use brake cleaner all the time. They do make non-chlorinated, wonder what that would do?

 

You know, I don't know if this is true. I have had my fair share of brake clean fires at work. Big ones. Never had a problem with posin gas. Both were large enough I had to use a fire extinguisher to put them out.

Maybe it was non-chlorinated thou? I know the mopar stuff is (wont kill bugs) and I cant remember if I was using it or not.

 

I am fortunate I haven't been zapped by degreaser and phosgene long ago.
We knew about phosgene and were warned against it and some of the unusual conditions that can create it. VERY easy to create with the chemicals we produced back then... Even bright sunlight acting on hot Carbon Tetrachloride vapors escaping into air can create it in lethal quantity!

As a young maint employee in a chemical plant, I was drilling thick aluminum plate on a drillpress and ran out of the special Tap-Magic for aluminum(green oily wintergreen smelling stuff). I was using degreaser to clean up the work pieces after drilling.
Running out of the green stuff, I grabbed an aerosol can of CRC Degreaser since the big bit was still chewing metal and was getting pretty hot, so I sprayed degreaser down the bit flutes just to cool it off.. WOW!!! DENSE opaque purple fumes with an AWFUL acidic choking scent came BOILING out of the borehole.... I jumped back and killed the feed while I sought some fresh air for a while.. I should have KNOWN that was NOT the right thing for a machining operation..
So, I located a can of REGULAR tap magic. Squirted some down into the bore and resumed feed... It worked for a moment until the same very dense, evil-looking purple gas came boiling out just like the degreaser... I started reading the Tap-Magic can.. "Warning!: NOT for use on aluminum!!"...Contains Trichloroethylene...
(JUST like the degreaser!!!)
Lesson learned...

Funny thing.. The newest "enviro-friendly" blend of CRC degreaser that removed Tri-clene from the original formula makes me immediately sick to my stomach and give me a bad headache whenever I get a whiff of the new stuff... Just like that day while making the purple gas...

 

His had mixed with the argon from the welder though...

 

Another innocuous way to get gassed is to open up an a/c system using r-12 or r-22 that has been cotaminated by the compressor motor (electric) going to ground and burning the refrigerant charge. Phosgene is some bad stuff and accumulates in your body, much like lead poisoning. I have had a couple of instances removing refrigerant hoses after evacuating systems, where phosgene leaked out..... Your own body's defenses will keep you from inhaling much more than just a small whisp....but in some instances, thats all it takes....

CAREFUL OUT THERE

Gary

 

SoTex,how the heck did you get a hold of Carbon Tech???That stuff was banned from fire extinguishers in around 1948!!! In really old unmolested industrial facilities you can sometimes find round glass "grenades" filled with carbon tech.The idea was to throw them at the fire and when they shattered they would "suppress the flames". Also used to be a great dry cleaning solvent,although not for long.

 

Back then I worked at a chem plant that made the feedstocks for producing R11 and R12! Carbon Tetrachloride by the BARGE LOADS...
Methane gas and Chlorine reacted, filtered, and distilled makes Carbon Tet which is (was) the feedstock for producing Freon 11.
Ethylene gas and chlorine reacted creates Perchloroethylene (dry cleaning stuff) which was the feedstock for producing Freon12.
I never "used" any carbon Tet, since we produced the world's BEST solvent for cleaning stuff, Freon 113... Boils at ~118degF and was used in vapor degreasers by the entire industrialized world. . Not any more... It was a CFC and is now banned... Great stuff, while it lasted...