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A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user i.
Typically, a fire extinguisher consists of a Fire Extinguisher Cabinet Padlock System hand-held cylindrical pressure vessel containing an agent which can be discharged to extinguish a fire. There are two main types of fire extinguishers: Stored fire extinguisher cabinet padlock type and generated pressure. In stored pressure units, the propellant is stored in the same chamber as the firefighting agent itself.
Depending on the agent used, different propellants are used. With dry chemical extinguishers, nitrogen is typically used; water and foam are pressurized with air. Stored pressure is the most common type of fire extinguisher. Cartridge-operated extinguishers contain the propellant gas in a separate cartridge that is punctured prior to discharge, exposing the propellant to the agent.
These types are not as common, used primarily in areas such as industrial facilities, where they receive higher-than-average use. They have the advantage of simple and prompt recharge, allowing an operator to discharge the extinguisher, recharge it, and return to the fire in a reasonable amount of time.
Unlike stored pressure types, these extinguishers utilize compressed carbon dioxide instead of nitrogen, although nitrogen cartridges are used on low temperature rated models. Cartridge operated types are available in dry chemical and dry powder in the US and water, wetting agent, foam, and dry powder ABC, BC, or D in the rest of the world.
Fire extinguishers are further divided into handheld and cart-mounted, also called wheeled extinguishers. Handheld extinguishers weigh from 0. These wheeled fire extinguisher cabinet padlock type are most commonly found at construction sites, airport runways, heliports, as well as docks and marinas.
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