Halons are electrically non-conducting and have been acknowledged as the most effective universal extinguishing agent for aircraft use. They work mainly by chemically interrupting the reaction described as the ‘Fire Triangle’ (Fuel-Oxygen-Heat) which must be sustained for a fire to continue.
Why Halon fire extinguisher is banned?
While Halon is considered a clean agent by The National Fire Protection Association because it’s electrically non-conducting and does not leave a residue, Halon has an extremely high potential for ozone depletion and contributes to global warming potential.
What type of fires can Halon be used on?
Halon is rated for flammable liquid fires and electrical fires, but can also be effective on class A fires.
What is a disadvantage of Halon fire extinguishers?
Disadvantages: Obscures vision. More irritating than ordinary dry chemical. Nozzle pressure may cause burning liquids to splash.
Is Halon toxic to humans?
Halon 1211 (a liquid streaming agent) and Halon 1301 (a gaseous flooding agent) leave no residue and are remarkably safe for human exposure. … Halon 1211 and Halon 1301 are low-toxicity, chemically stable compounds that, as long as they remain contained in cylinders, are easily recyclable.
How long do Halon fire extinguishers last?
Fire extinguishers last between five and 15 years but they all ultimately expire and become ineffective, no matter what fire-fighting substance they contain. Household fire extinguishers—which are typically filled with dry chemicals (carbon dioxide or halon)—lose their charge over time.
Is Halon still used in aircraft?
While the production of Halon ceased on January 1, 1994, under the Clean Air Act, it is still legal to purchase and use recycled Halon and Halon fire extinguishers. In fact, the FAA continues to recommend Halon fire extinguishers for aircraft.
Is Halon fire extinguisher banned?
Halon itself has not been banned, just new production. There are new substitute suppression agents commercially available or under development, along with alternative protection methods to fill the gaps created from the lack of new Halon production.
How do you clean Halon?
While Halon leaves behind no visible residue, it’s still important to clean areas that came in contact with this extinguishing agent to remove smoky smells from the fire and neutralize the surface. Apply diluted degreaser to the affected area. Use a sponge for small spots or a spray bottle for larger surface areas.