Know Your Dry Powder Fire Extinguisher
Dry powder fire extinguisher is the most effective all round model for use in the home or on a vehicle due to its impressive coverage of multiple fire classes. They generally come as ABE or BE variants and are rated for use on those types of fires. As an added bonus they are safe to use on electrical fires too which is an impressive extension to their usage.
Certain locations are not suitable for powder extinguishers as when set off they produce a cloud which may obscure people's vision and make it difficult to find the fire exit. The powder can also cause some breathing problems when inhaled. For this reason they are not used in offices, hotels or other areas which are enclosed and filled with the public such as a school or large shop.
A side effect of powder is that the powder is corrosive to soft metals and also attracts moisture, so if used on electrical products they will pretty much be destroyed and useless.. They should only be used on sensitive electrical equipment if there is absolutely no other option to tackle the blaze. This is also why you cannot use a powder extinguisher on an aircraft.
Dry powder extinguishing agent which is forced out of the extinguisher under pressure by a non flammable gas. The powder then smothers the fire and prevents re-ignition by removing one of the fire causing elements such as oxygen.
Dry powder downside of powder is the fact it is extremely messy, but that's a small price to pay to save your life. The powder should be cleared up fully after any fire and disposed of correctly. This type of powder extinguisher is used a lot within motor racing as its so effective at tackling a petrol fire and is commonly seen at airports also.
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