What is a key risk associated with controlling liquefied materials under pressure?

The key risk associated with controlling liquefied materials under pressure is BLEVE, which stands for Boiling Liquid/Expanding Vapor Explosion. This risk arises when a vessel containing liquefied gas or liquid under pressure is exposed to heat, causing the liquid to boil. As the pressure builds inside the vessel due to the expanding vapor, if the pressure exceeds the vessel's capacity, it can lead to a catastrophic failure. This sudden release of pressure can result in a violent explosion, sending debris and projectiles in all directions, posing significant dangers to responders and nearby individuals.

Understanding the BLEVE phenomenon is crucial for emergency responders when handling incidents involving pressurized liquefied materials, as it helps them recognize the potential for explosive effects and prepare for appropriate safety measures.