Richard J Kinch wrote:

Jack Erbes writes:

I think the bottom line on purging is to reduce the potential for
explosions.

If that's the case, then why do we use gasoline tanks full of air?
Shouldn't they be purged, too?

The "i think" answer was wrong, the question was wrong (or
just sarcastic). Explain the explosion potential of air in
a propane tank? And, there is no explosion potential in a
gasoline tank, the air/fuel ration over the liquid gasoline
is too rich to burn. Right at the filler opening is a
different question.