A common hazard with cylinders involved in fire is:

• A. Gas leakage only
• B. Electrical fire
• C. The potential for explosion
• D. Structural collapse

Answer: (C)

When cylinders are exposed to fire, the danger comes from the energy stored under high pressure inside the container. Heat from the fire raises the gas temperature and pressure inside the cylinder, and if the cylinder’s integrity is compromised, it can rupture or blow off the valve, releasing a sudden surge of gas and potentially causing an explosion. If the gas inside is a liquefied gas, heating can lead to a BLEVE (boiling liquid expanding vapor explosion), which is an even more violent release of energy.

Gas leakage can occur, but it’s the rapid pressure buildup and possible rupture that make explosion the most significant hazard in a fire scenario. Electrical fires and structural collapse might be risks in some fires, but they are not the specific hazard inherent to cylinders themselves. The key urgent danger with cylinders in fire is the potential for explosion.