What flammable mixture prevention technique involves keeping the head space above the liquid in a storage tank full of an inert gas?

The technique of keeping the head space above the liquid in a storage tank filled with an inert gas is referred to as blanketing. This method is crucial because it minimizes the presence of flammable vapors within the space above the liquid. By introducing an inert gas, such as nitrogen, the oxygen concentration is reduced, thereby creating an environment that is less conducive to combustion. This is particularly important in storage tanks containing flammable liquids, as it helps to prevent potential ignition sources from causing a fire or explosion.

Inert gases create a protective barrier that effectively diminishes the risk associated with the accumulation of flammable vapors. This strategy is an essential safety measure in chemical processing and storage facilities, significantly contributing to overall fire hazard prevention.

Ventilation involves the movement of air to dissipate flammable vapors, which is useful but does not specifically involve the introduction of an inert gas into the headspace. Purging also refers to removing unwanted gases or vapors from a container, often using an inert gas, but it typically occurs during the cleaning or initial filling process rather than maintaining an ongoing headspace condition. Flame arresting focuses on preventing flame propagation in environments where flammable gases are present, and does not involve the creation of an inert atmosphere.