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Maintenance

Fire Extinguisher

  • A Maintenance check involves disassembling the extinguisher, examine all its parts, cleaning and replacing any defective parts, and reassembling, recharging and where appropriate, repressuring the extinguisher.

  • Maintenance should be performed periodically, but at least once a year, after each use, or when inspection shows that the need is obvious.

Maintenance Operations are as follows:

  1. The mechanical parts of the device (that is, the extinguisher shell and other component parts)

  2. The amount and condition of the extinguishing agent

  3. The condition of the means for expelling the agent

A record of the date of purchase as well as maintenance dates should be kept for each extinguisher, a separate record is also desirable and should include:

  1. The maintenance date and the name of the person or agency performing the maintenance.

  2. The date when last recharged and the name of the person or agency performing the recharge.

  3. The hydrostatic retest data and the name of the person or agency performing the hydrostatic test.

  4. Description of dents remaining after passing a hydrostatic test.

  5. The date of the 6-year maintenance for certain stored pressure dry chemical and Halon 1211 extinguishers.

Water type extinguishers:

  • Principle items that need to be checked during an inspection are loose, worn, or damaged hose; plugged nozzle; dented shell; damaged indicator gauge; and a damaged or jammed ring pin.

  • Normal maintenance service, as specified in the NFPA extinguisher Standard, should be performed annually.

  • The tanks containing the water or antifreeze solution must be checked to ensure they are in good condition, have not been weakened by corrosive action, and do not contain sediment which might block the stream during the pumping operation. 

Dry chemical extinguishers:

  • Dry chemical extinguishers should be inspected monthly, and they should also undergo normal annual maintenance.

  • The quality of the agent for a cartridge-operated model can be checked by weighing or by removing the fill cap and checking it visually.

  • It should be promptly refilled after use, even if they have been only partially discharged.

  • The rubber sleeves on the gas tube should be checked to see that they are not cracked or over-stretched, that the gasket and the gasket seats on the shell and cap are wiped clean, and that the cap is screwed on hand tight.

Carbon Dioxide extinguishers:

  • Weighing is the only way to determine whether carbon dioxide extinguishers are fully charged.

  • They should be weighed at least semi-annually for loss of weight, deterioration, and physical damage.

  • Any CO2 extinguisher that has a weight loss of 105 or more should be recharged and tested for leaks.

Maintenance Datasheet are as follows:

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