Which statement about BLEVE susceptibility is true?

Which statement about BLEVE susceptibility is true?

• A. All stored liquid cylinders are susceptible to a BLEVE.
• B. Only some cylinders are susceptible.
• C. Cylinders never BLEVE.
• D. BLEVE can be prevented by venting.

Answer: (A)

BLEVE happens when a container that holds a liquefied gas under pressure is heated. The heat makes the liquid boil and the vapor pressure rise dramatically. Because the vessel is only built to a certain design pressure, continued heating can push it past its limit, causing the wall to fail. When the vessel ruptures, the liquid flashes to high-pressure gas and expands rapidly, producing a dangerous explosion plus flying debris—the BLEVE. Because any cylinder that contains a liquefied gas under pressure can experience this sequence of events if exposed to enough heat, all stored liquid cylinders carry BLEVE potential under fire conditions. Venting or releasing gas does not guarantee prevention; it may lower pressure temporarily, but if the fire continues to heat the container, structural failure and a BLEVE can still occur. The other statements imply exclusions or guaranteed prevention, which don’t align with the physics and typical fire service understanding of BLEVE risk.

BLEVE happens when a container that holds a liquefied gas under pressure is heated. The heat makes the liquid boil and the vapor pressure rise dramatically. Because the vessel is only built to a certain design pressure, continued heating can push it past its limit, causing the wall to fail. When the vessel ruptures, the liquid flashes to high-pressure gas and expands rapidly, producing a dangerous explosion plus flying debris—the BLEVE.

Because any cylinder that contains a liquefied gas under pressure can experience this sequence of events if exposed to enough heat, all stored liquid cylinders carry BLEVE potential under fire conditions. Venting or releasing gas does not guarantee prevention; it may lower pressure temporarily, but if the fire continues to heat the container, structural failure and a BLEVE can still occur. The other statements imply exclusions or guaranteed prevention, which don’t align with the physics and typical fire service understanding of BLEVE risk.