These are known as BLEVE explosions, in which you have a liquid maintained above its boiling point through elevated pressure. When the vessel is breached the p

These are known as BLEVE explosions, in which you have a liquid maintained above its boiling point through elevated pressure. When the vessel is breached the pressure quickly drops resulting in the entire volume flashing to vapor at a massive (1000x+) increase in displacement. https://en.wikipedia.org/wiki/Boiling_liquid_expanding_vapor_explosion https://en.wikipedia.org/wiki/Boiling_liquid_expanding_vapor...