There are a few different classifications of types of fire. One of these is class F. This type of fire refers to fires involving cooking oil or fat. For each class of fire, there is an associated fire extinguisher that can put it out.
Class F Fire Extinguishers Explained
As stated before, class F fires involve cooking oil or deep fat fryers and usually occur in the kitchen. This type of fire is technically a subcategory of class B fires (fires caused by flammable liquid or gas). However, they are different from class B fires because of the very high temperatures involved.
Causes and Classifications
Flammable liquids like petrol typically have low auto-ignition temperatures. On the other hand, fats and cooking oil ignite anywhere after 340 degrees Celsius. Thus, they are classified separately.
Most class F fires are caused by carelessness in the kitchen. Changing the oil in deep fat fryers and making sure to watch hot pans are a couple of ways to combat class F fires before they happen.
What Is The Best Class F Fire Extinguisher?
The best (and only) fire extinguisher to use for a class F fire is a wet chemical fire extinguisher. This type of extinguisher has been specifically designed to fight fires that involve fats and cooking oils. Wet chemical fire extinguishers contain potassium salt that smothers a fire’s oxygen source and cools the flames down.
How Do You Extinguish a Class F Fire?
To put out any fire, one of three elements must be eliminated: heat, oxygen, or fuel. For a class F fire, the burning liquid’s temperature needs to get below its flashpoint. However, this is very hard to do because of fats’ and cooking oils’ extremely high temperatures.
Thus, most fire extinguishers are not suited to work on class F fires and can cause even more danger. If one uses a water fire extinguisher on a class F fire, the result could be an explosion of oil and fire. CO2 and powder fire extinguishers won’t do much good either and can potentially damage your property or hurt the people involved in the fire.
The “PASS” Method
Learning the “PASS” technique is one of the first steps to using a fire extinguisher properly. It’s quite easy to remember and will help you significantly in the event of a fire.
You can use a wet chemical fire extinguisher (or any other type) by doing the following: 1. “P” for pulling the pin, 2. “A” aim at the fire, 3. “S” squeeze the handle, and 4. “S” sweep the nozzle from side to side or whichever way the fire seems to be spreading.
Other Fire Safety Tips
Another important thing to know about using a fire extinguisher is how to take care of it and keep up its regular maintenance. Ensure that you get your extinguisher(s) inspected regularly and keep them clean. After using an extinguisher, be sure to replace or recharge it, depending on how much material is left or how damaged it might be.