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  #16 (permalink)  
Old 03-19-2012, 05:04 PM
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In the 1970's

We welded and brazed mant gas tanks we always purged the tanks with carbon monoxide from another running vehichle with a flex pipe off the exhaust pipes. We never had any problems gas could not ignite with out OX. Of course we dreained them also. The guy down the raod tried to cut into our business and blew the front of his garge off and into the streets. He didnt have the secret like we did....

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  #17 (permalink)  
Old 03-19-2012, 07:33 PM
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i washed mine out with dawn soap, then filled it with water till it ran out the hole i was welding. i burped some out so i wasnt welding under water, then filled the hole.
my neighbors, we dawn washed/water filled and used the horrible freight air saw to cut a large rust hole out and patch welded it the same method. these were both out of service for a while but had the smell of bad gas in them.

just be safe, think twice before doing anything and think three times while doing it.
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Old 08-08-2012, 12:11 PM
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it's funny ..

i don't think twice about filling a tire with ether and tossing a match on it to seat a bead on a rim ..

but it scares me to death thinking about cutting/welding a gas tank
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Old 08-08-2012, 12:35 PM
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Quote:
Originally Posted by cseay1949 View Post
it's funny ..

i don't think twice about filling a tire with ether and tossing a match on it to seat a bead on a rim ..

but it scares me to death thinking about cutting/welding a gas tank
I know a guy who was doing that to a flat on a truck inside a furniture warehouse packed full of furniture. When he ignited it the truck caught fire. I don't know if it was too much either, oil leaks or what. They had a fire extinguisher malfunction and almost lost control of the fire which would have cost several million dollars in furniture plus a very large warehouse.
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Old 08-08-2012, 12:46 PM
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Clean it out as best you can. Put dry ice in it and let most of it go to vapor. This will displace the vapors in the tank and the vapor from dry ice (frozen CO2) will not support combustion.

When we used to do underground tank removals at gas stations, the tanks were alwayed purged with dry ice.
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Old 08-08-2012, 10:35 PM
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We always used Tide detergent...
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Old 08-09-2012, 02:58 PM
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Not knowing anything about this I would fill it with water and leave the hose running in it then attack it with a sawzall.
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