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English: Diagram from Thomas J. Martin's fire extinguisher patent (US125063). The patent is signed by Thomas J. Martin and two witnesses and dated 26 March 1872. The diagram depicts a tall vertical structure that can be used to extinguish fires within buildings.
It is a colorless non-flammable liquid. Along with Halons 1211, 2402, and 1301, it is one of the most effective fire extinguishers, however, it is also very toxic. It is a class I ozone depleting substance (ODS).
Pentafluoroethane is a fluorocarbon with the formula CF 3 CHF 2. Pentafluoroethane is currently used as a refrigerant (known as R-125) and also used as a fire suppression agent in fire suppression systems. Pentafluoroethane does not deplete ozone so it has replaced earlier fluorinated chemicals that did.
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Gaseous fire suppression, also called clean agent fire suppression, is the use of inert gases and chemical agents to extinguish a fire. These agents are governed by the National Fire Protection Association (NFPA) Standard for Clean Agent Fire Extinguishing Systems – NFPA 2001 in the US, with different standards and regulations elsewhere.
In other words, a fast flow extinguisher expels a higher volume of agent in less time than a standard compliance flow extinguisher. As a result, fast flow extinguishers have lower UL class A&B ratings than compliance flow extinguishers (the class B numerical rating is the approximate square feet of burning fuel a novice operator could expect to ...
An empty fire extinguisher which was not replaced for years. Most countries in the world require regular fire extinguisher maintenance by a competent person to operate safely and effectively, as part of fire safety legislation. Lack of maintenance can lead to an extinguisher not discharging when required, or rupturing when pressurized.
Halon 1301 is widely used by the U.S. Military [7] and NASA in a 2-3/4 lb portable extinguisher with a sealed, disposable cylinder for quick recharging. Other agents such as CO 2 and FE-36 (HFC-236fa) wet chemical are largely replacing halon 1301 for environmental concerns.