Fire is one of the most important discoveries of humans. But it can be boon or evil both. Fire at home or workplace causes thousands of deaths and damage to property every year. Portable fire extinguishers can be very helpful in limiting damage to property and lives until additional help arrives. Thus, it is essential to make portable fire extinguishers as a key component of the fire prevention plan.
Operational principle– To sustain, fire requires sufficient oxygen, sufficient heat (to raise the material to ignition temperature), fuel/ combustible material(to burn), chemical reaction that is fire it shelf to sustain. Extinguishers must counter and change these conditions to prevent fire. Portable fire extinguishers releases an extinguishing agent that will decrease the temperature of burning combustible material , displace or remove oxygen or stop the reaction to stop fire. When the handle of an extinguisher is compressed, agent is expelled out of nozzle. These portable fire extinguishers must comply with government‘s set standards and regulations over extinguishers component and procedure of use.
Method of use– People must be trained properly the principle and practice to use extinguishers and also hazards while fire fighting. The following steps should be followed while firefighting are:-
Sound the fire alarm and inform fire department about the accident. Make an evacuation path and prevent fire from spreading to this path. According to the type of fire, use fire extinguishers like chemical, CO2 etc.
Use fire extinguishers within its effective range of spreading extinguishing agent over fire using PASS technique.
- PULL the pin – this will break the tamper seal and release agents from tank .
- AIM- the nozzle should be pointed towards fire.
- SQUEEZE- squeezes the handle to release agent from nozzle.
- SWEEP- sweep from side to side till fire is completely out.
Placement and spacing– portable fire extinguishers must be installed in every prospective region that can catch fire. It should be mounted on the wall and should be within easy reach of people fighting the fire. It should always be in proper condition as it is used in emergency services. Regular maintenance and inspection should be done to ensure an appropriate condition of portable fire extinguishers. Pins and tamper seal should be checked to find whether it is intact or not. The pressure gauge should be reviewed to find whether it is fully charged or not. Extinguishers’ critical component (cylinder, seal, hose assembly etc.)should be checked regularly through the hydro-static method for leaks and structural flaws.
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