Fire Extinguisher By Sk Sons & Associates

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A) Maintenance of Fire Extinguisher watered type Gas Cartridge (IS 940)

Open the extinguisher, see the water level, throw away the water charge.
Examine the extinguisher body internally and externally for corrosion and damaged conditions with illuminating probe. Damaged and corroded extinguisher should be removed from service. Corroded Gas Cartridge should also be replaced.
Examine the gas cartridge for mass. If there is loss of more than 10 percent of original mass, the cartridge should be sent for-recharging after being replaced by a charged one. For re-charging procedure given in 12.4 should be followed.
Examine nozzle, strainer, vent holes, internal discharge tube, sealing washer, replace them if not in good condition. Otherwise clean them thoroughly.
Check the operating mechanism for free movement and piercing mechanism if working properly.
Refill the fire extinguisher with clean water.

B) Fire Extinguisher, Foam type mechanical (IS 10204):

Open the extinguisher, check the liquid level. Pour liquid in separate clean receptacle to see if there is any sediment at the bottom of the cylinder reject the charge if there is sufficient sludge formation.
Examine the extinguisher externally and internally for any corrosion or damage. Damaged and corroded extinguisher should be removed from service. Corroded gas cartridge should also be replaced.
Examine the foam generating nozzle, strainer, vent hoes, internal discharge tube ceiling washer, etc. replace them, if not in good condition. Otherwise clean them thoroughly.
Check the operating mechanism for free movement and piercing mechanism for proper working.
Clean the hose assembly and check it for any dust/sediment at either shank ends.