Posted 5/30/2017 21:16 (#6046116 - in reply to #6045764) Subject: RE: LP tank on a grill blowing up???
Madison Co. Virginia
Propane won't burn without oxygen.
Option #1. The tank was at atmospheric pressure and contained an ideal mix of propane and air. I don't think the resulting flare could even be considered an explosion.
Option #2. The tank was overfilled or had a weak weld. Something, whether an outside heat source or an impact, ruptured the tank, and the result was a fireball.