What extinguisher would you use for flammable liquid fires?

The use of CO2 and foam extinguishers for flammable liquid fires is based on their specific extinguishing properties that make them effective in combatting this type of fire. CO2 (carbon dioxide) extinguishers work by displacing oxygen around the fire, thereby suffocating it. This is particularly effective for flammable liquid fires since these fires often require the presence of liquid fuel to sustain combustion. By removing oxygen, CO2 effectively interrupts the combustion process.

Foam extinguishers, on the other hand, create a barrier between the fuel and the fire. This barrier prevents the vapors from escaping, thereby preventing re-ignition and effectively smothering the existing flames. Foam is particularly useful in covering liquid fuels, providing a layer that both cools and seals off the fuel's surface from the air.

In summary, utilizing CO2 and foam extinguishers for flammable liquid fires effectively addresses the potential for re-ignition and ensures that the flammable vapors are contained, providing a comprehensive approach to extinguishing these types of fires.