It is not very well known, but fire extinguishers that have the potential to be exposed to damage from environmental conditions are required to be installed with protective covers. Not only is it common sense, there is a provision in NFPA 10, Standard for Portable Fire Extinguishers that mandates them.
Per NFPA 22.214.171.124 Fire extinguishers installed under conditions where they are subject to physical damage (e.g., from impact, vibration, the environment) shall be protected against damage.
(NFPA 10, 2013 Edition)
Almost every extinguisher that is outdoors needs an extinguisher cover to protect it from the elements. This includes extinguishers hung on the outsides of buildings, extinguishers at fueling racks, and extinguishers mounted on the outside of vehicles, such as fuel and trash trucks. Other applications include wheeled extinguishers that are outside at industrial facilities. American Fire & Security not only offers extinguisher covers for wheeled units, but we also have extinguisher covers for most hand extinguishers, including cartridge operated extinguishers that are frequently employed for vehicles and installed in industrial plants.
Our technicians will take a close look at extinguisher covers during annual maintenance of extinguishers. When you remove the extinguisher cover, examine the condition of the material, the hook and loop closure or elastic-back, and the window, where provided. Some extinguisher covers also have pull bottom tabs and straps that must be examined for wear. If any of these items are appear significantly worn or damaged, it is time for a new extinguisher cover.
If you have any questions about if your facility should have fire extinguisher covers please feel free to reach out to me at (937) 262-7937 or info@AFS911.com