On Fri, 02 Mar 2007 20:51:21 GMT, Orval Fairbairn
wrote:

In article ,
Earl wrote:

Rob said his tank had developed a leak. That would mean that there had
been gasoline in the tank. I don't think anyone would suggest welding
a used metal tank, how could it be any safer with a plasic one?


Steve in Michigan

Actually, it is quite safe -- if done right. I have done this several
times.

1. Look up "Dry Ice" in your Yellow Pages.

2. Get the smallest amount they will sell you (usually about 5 lb.)

3. Put it in the tank and let sit for about 1/2 hour.

The dry ice (CO2 no thanks to Al Gore) displaces smothers the oxygen
from the tank and will not support combustion.

The nice thing about dry ice is that it leaves no residue, unlike
filling the tank with water

Welded (brazed) a patch on the oilpan of a '64 Riviera one day without
pulling it. Rinsed out all the oil I could, first with varsol, then
hot water - and filled the crankcase with a CO2 extinguisher. Had the
apprentice sitting on the fender, giving it a little shot every minute
or so untill I has the patch fully sweated on. (guy had driven into
the rebar used to spike a parking cub down and HAD to leave for
Chicago that evening - from Kitchener Ontario)

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