The rapid over-pressurization reaction in closed containers occurring at about one second or less is called

The rapid over-pressurization reaction in closed containers occurring at about one second or less is called

• A. Rapid relief.
• B. Boiling liquid expanding vapor explosion.
• C. Crack.
• D. Low pressure release.

Answer: (B)

Rapid over-pressurization inside a closed vessel that happens in about a second is a BLEVE—Boiling Liquid Expanding Vapor Explosion. This occurs when a container holding a liquid at elevated temperature or pressure is heated or otherwise compromised. The liquid boils, forming a large volume of vapor inside the sealed vessel. Because the container can’t vent this pressure, it builds up rapidly until the vessel ruptures. When it fails, the high‑pressure vapor and liquid burst outward, causing a violent explosion and often a fireball. This is different from a rapid relief (which would vent pressure safely), a crack (a structural failure without the rapid, explosive vapor buildup), or a low‑pressure release (which would reduce pressure rather than cause an explosion).

Rapid over-pressurization inside a closed vessel that happens in about a second is a BLEVE—Boiling Liquid Expanding Vapor Explosion. This occurs when a container holding a liquid at elevated temperature or pressure is heated or otherwise compromised. The liquid boils, forming a large volume of vapor inside the sealed vessel. Because the container can’t vent this pressure, it builds up rapidly until the vessel ruptures. When it fails, the high‑pressure vapor and liquid burst outward, causing a violent explosion and often a fireball. This is different from a rapid relief (which would vent pressure safely), a crack (a structural failure without the rapid, explosive vapor buildup), or a low‑pressure release (which would reduce pressure rather than cause an explosion).