On Sun, 30 Mar 2008 17:55:34 -0600, Paul Cassel
wrote:

WaIIy wrote:


In high school shop class, I had a lawnmower gas tank I wanted to
solder.

I washed the tank with host soapy water and let water run through it for
about ten minutes. I then waited for it to dry.

As soon as I hit it with the torch, kaboom and there went part of my
left eyebrow.


I thought when welding fuel tanks you leave them full of water when you
do the welding.


That is one theory but (1) you can't weld a portion of a normal (thin)
tank that is in contact with water as if you get 100 penetration your
filler metal comes in contact with the liquid and (2) if you are
welding above the water level there is room for explosive gasses to
accumulate.



Bruce-in-Bangkok
(correct email address for reply)