What is the primary purpose of a blanketing technique in flammable liquid storage?

The primary purpose of a blanketing technique in flammable liquid storage is to minimize flammable vapors. Blanketing involves creating a protective layer of an inert gas, such as nitrogen, over the surface of the liquid in storage to displace volatile vapors. This process not only reduces the potential for the formation of flammable mixtures in the air but also limits the oxygen exposure, which is crucial for combustion. By maintaining an inert atmosphere, the risk of ignition is significantly lessened, enhancing safety in environments where flammable liquids are stored.

The prevention of evaporation can be a secondary benefit of the blanketing process, but its main goal is focused on controlling vapors that could ignite. Cooling the liquid is generally not a function of the blanketing technique, as its primary operation is related to vapor control rather than temperature management. Providing structural support does not align with the purpose of blanketing; rather, this function pertains to the containment and integrity of storage systems.