CO2 is an excellent smothering agents for extinguishing fires.Its about 1.5 times heavier than air. It can easily be liquefied and bottled normally under pressure of approximately 150to 200 bars.
When used on fire the liquid CO2 gas taking away some heat.The gas extinguishers the fire by smothering it is a quick clean and non - conductor of electricity. It is comparatively non-toxic& does not harm most of the materials. It does not leave any residue. It can be stored for long period and it is easily available .CO2 is very effective in enclosed areas.It cannot penetrate in to any places that cannot be reduced by other means.It does not damage delicate machinery & instruments. It can be used safely on electrical equipments & panels.CO2 is highly ashipciating and cannot be detected by smell or colour. About 9% concentration causes unconsciousness .Any compartment which has been flooded with CO2 must be fully ventilated before entering without wearing breathing apparatus.
When liquid Co2 is released from a pressurised storage cylinder there is an extremely rapid expansion from to gas which produce a refrigerating effect that convert part of CO2 in to snow. This snow which has a temperature of -79 degree Celsius,soon sublimes( changes directly from solid to gas ). This sublimation produce some cooling effect but it is the smothering effect of the gas ,which is of primary importance in the extinguishing process. At normal temperature & pressure the expansion ratio of CO2 is 1:450.
When used on fire the liquid CO2 gas taking away some heat.The gas extinguishers the fire by smothering it is a quick clean and non - conductor of electricity. It is comparatively non-toxic& does not harm most of the materials. It does not leave any residue. It can be stored for long period and it is easily available .CO2 is very effective in enclosed areas.It cannot penetrate in to any places that cannot be reduced by other means.It does not damage delicate machinery & instruments. It can be used safely on electrical equipments & panels.CO2 is highly ashipciating and cannot be detected by smell or colour. About 9% concentration causes unconsciousness .Any compartment which has been flooded with CO2 must be fully ventilated before entering without wearing breathing apparatus.
When liquid Co2 is released from a pressurised storage cylinder there is an extremely rapid expansion from to gas which produce a refrigerating effect that convert part of CO2 in to snow. This snow which has a temperature of -79 degree Celsius,soon sublimes( changes directly from solid to gas ). This sublimation produce some cooling effect but it is the smothering effect of the gas ,which is of primary importance in the extinguishing process. At normal temperature & pressure the expansion ratio of CO2 is 1:450.
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