Fire extinguishers work by removing heat, air, or both. Artwork: You need to to take away one or more of heat, air (oxygen), or fuel to break the triangle and put the fire.
Disposable fire extinguishers can’t be recharged, so you should replace them 12 years after the manufacturing date. The 2007 edition of NFPA 10 also requires dry chemical extinguishers manufactured before October 1984 to be disposed of at the next six-year maintenance period or 12-year hydrostatic test, whichever comes first.
Do Fire Extinguishers Expire? How Long Do They Last?
Yes, most fire extinguishers will last for 5 to 15 years and they usually indicate the lifespan of the extinguisher. Though they may last for years, they need to be inspected and serviced/recharged regularly (usually annually) to function properly. Let’s take a look at why it is so important to understand the use and lifespan of your fire …
In this video we demonstrate how to recharge and operate an antique soda-acid fire extinguisher and we explain some of the chemistry involved along the way. …
People Also Ask how do old fire extinguishers work
How does a fire extinguisher work?
Every fire-fighting technique you can think of involves removing heat, oxygen, or fuel—sometimes more than one of those things at the same time. Fire extinguishers work by removing heat, air, or both.
How do you use a plastic fire extinguisher?
The nozzle often ends in a piece of bendy plastic so you can easily direct it toward the base of a fire. To operate the extinguisher, you pull the ring and press the handle. Pressing the handle opens a valve (shown here as a green arrow) that releases the pressurized gas from the canister.
What does a fire extinguisher look like?
Most of the extinguisher is filled with water (blue). A tube runs right up the inside of the tube to a nozzle outside (gray). The nozzle often ends in a piece of bendy plastic so you can easily direct it toward the base of a fire. To operate the extinguisher, you pull the ring and press the handle.
How long do fire extinguishers last?
If you keep up with maintenance and hydrostatic testing requirements, you can expect your extinguishers to last for many decades. Follow these rules outlined in NFPA 10 to keep your fire extinguishers around for years: Check all fire extinguisher gauges monthlyto make sure they are holding a charge.
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Antique Soda-Acid Fire Extinguisher: Recharging and Operating Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher