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Know the Working of Fire Extinguishing Systems!

Fire extinguishers are handy devices which prevent a fire to spread. These systems prove to be the call of the day as they cut of the oxygen supplies by sheer force, or by forming a blanket around the fire. Fire alarms also come in handy as they sense potential fire damage.
Fire extinguishing systems, also known as fire suppression systems, are synchronized with fire alarm systems and smoke detectors, with accordance to a section of law - NFPA 13. Fire suppressing systems are essentially of two types: Wet Fire Sprinklers and Gaseous agents.
Wet fire sprinklers gushes out water, when the consequences of a fire spread has been detected, for instance smoke or increased thermal temperature in the surroundings as compared to normal room temperature. Each such sprinkler has a highly-sensitive glass bulb linked to the sprinkler by a metal (As it is a good conductor). Each sprinkler works independently to other sprinklers, thus facilitating water supply to the area which is affected. Due to excessive heat, the liquid inside the bulb expands and as a result, the glass of the bulb breaks. The color of the bulb indicates the intensity of the fire spread. For instance, at normal temperature, the bulb obtains a color of orange or red. At high temperatures of 120 Celsius, the color of the bulb is blue. At temperatures even higher, say 300 Celsius, it turns black. Wet fire sprinklers are automatic fire extinguishing systems, which need not be handled manually once properly set up. ESFR sprinklers (Early Suppression Fast Response) are the best of its kind. They are vastly used in the corporate sector, offices, malls, large halls, theatres, hospitals and also in some bungalows. However, they are more expensive than the common day extinguishers.
Gaseous agents involve the use of either extremely active agents, or non-reactive inert gases, which are ejected through solid propellant gas generators. It works on any of these principles:
· Remove the fuel stimulating the fire.
· Removal of oxygen to stop burning and spread of fire.
· Reduction of heat using agents like Novec 1230.
There are two ways to deal with the gaseous fire extinguishing systems. The first method is to apply it directly upon the fire. There will be no barriers around the affected place. This method is called local application. Another way to use it is by the flooding system. It requires the evacuation of the place, and is surrounded by physical barriers. It intensifies the gaseous agents in the particular three-dimensional place, and stops the spread of fire more efficiently.
However, two precautions are to be kept in mind:
Barotraumas - Due to excessive intensification of the gaseous agents, a pressure is created. Some inert gases like argon may also break walls and windows due to the pressure.
Respiratory problems - Human evacuation is quintessential the gaseous agents may cause several respiratory disorders and suffocation.

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