i have a tank with a missing mounting tab and was wondering what i have to do to the tank to get rid of the gas fumes before i weld it
I have heard the same, but have never tried it. The fact that you can still type on the forum does give me some confidence in what you say. Assuming a dry tank and I guess I would still put a flame to the tank inlet from a distance before arcing off.This may sound foolish, but I've done it a bunch of times. Start your car and put the fuel inlet (gas cap area) over the tailpipe and let the carbon monoxide fumes run thru it for a few minutes. The carbon monoxide will purge the gas fumes out of the tank and allow you to weld it with no Boom Boom. I've done this at least ten times in the past year without incident.....
maybe that explains the hairSeveral years ago, Billy Lane wrote an article in Iron Horse, on modifying a tank.
He swore there were no fumes in the tank, but it still went up in a fire ball.
The heat from cutting or welding, can turn the varnish that forms
on the inside of tank, back into fuel vapor.
You might get lucky, or maybe not.
great write up! one of the most informative I have ever read.A story with pictures of fixing my leaking tank: