Wet Chemical Fire Extinguishers
Wet Chemical fire extinguishers are an aqueous option, commonly alkali steel salts. This extinguishant is designed for fires entailing cooking oils and animal fats.
How to Identify A Wet Chemical Fire Extinguisher
Wet chemical extinguishers come in an all-red cylinder with an oatmeal coloured band around the top.
Where To Use A Wet Chemical Fire Extinguisher
The Wet chemical fire extinguisher is suitable for class A as well as Class F fires. Highly recommended for commercial kitchens where it is more likely for a fire to ignite, involving cooking oils, grease and fats. They are the only types of extinguishers that are recommended to fight Class F fires. Commercial kitchens are also recommended to have fire blankets and CO2 extinguishers for greater coverage.
How Does A Wet Chemical Fire Extinguisher Work?
Wet chemical fire extinguishers contain an odourless, clear fluid. It has a chemical reaction that turns the cooking fat into a soapy substance while at the same time preventing it from reigniting.
Advantages Of Wet Chemical Fire Extinguishers
A wet chemical fire extinguisher provides a fast reduction in the event of a class F fire, leaving a soapy barrier that continues to control the ignition point after the fine mist is expelled from the extinguisher, reducing the chances of the fire reigniting. With the pressure of the extinguisher being low, it eliminates the risk of the cooking fats and oils being splashed around which could potentially cause the fire to spread or result in injury. Clean up after use is quick and easy.
Disadvantages Of Wet Chemical Fire Extinguishers
The solution inside a wet chemical fire extinguisher is alkaline. Consequently will corrode some metals, especially aluminium. The solution could also irritate the eyes and the skin. Immediate clean up is highly recommended. Not suitable for electrical fires.
How Often Should I Test My Wet Chemical Extinguisher?
Wet Chemical Fire extinguishers should be serviced every 12 months by a professional, per NZS 4503:2005. Extinguishers need to be tested at least once every six months in environments deemed’ hostile’. A hostile environment could mean that your work type has more associated fire hazards than usual. Every Five years, fire extinguishers require a hydrostatic pressure test to make sure your device is operating effectively and recharged when an extinguisher is discharged. Wet chemicals require additional testing every three years.
How To Use Wet Chemical Fire Extinguishers
Like all other fire extinguishers, you need to remember the PASS-word. Pull the pin Aim at the base of the fire. Squeeze the handle. Sweep from side to side.