Routine Maintenances Carried Out on Portable Fire Extinguishers

Portable Water Fire Extinguishers 
             Before examining ensure that no residual pressure in the hose and nozzle assembly. Unscrew the head or valve assembly slightly so that any residual pressure escapes through the holes provided.

  • examine the extinguisher body internally and externally for corrosion and damage
  • check the weight of the gas cartridge and compare with the marked value. Note the hydraulic test date of the cartridge and replace if it is more than 10 years old.
  • examine and clean the vent holes in the cap.
  • examine nozzle, strainer and internal discharge tube for blockages and obstructions. Also check the operating mechanism
  • examine the sealing washers and hose and replace them if the parts are not in good condition.
  • top up or fill with indicated level of fresh water. In case of special solutions like corrosion inhibitors or antifreeze refill with recommended mixture.
 Portable Dry Powder Fire Extinguishers
  • the extinguisher should be weighed and if there is more than 10% loss of powder the extinguisher should be recharged.
  •  the annual inspection should follow same procedure as described above for cartridge type water extinguishers
  • before removing the dry powder the cap should be removed and the powder examined for visual signs of caking lumps or foreign bodies. The cap should then be replaced and the powder agitated by inverting and shaking the extinguisher. Following this, if there is any sign of caking or foreign bodies, the charge should be discarded and extinguisher recharged.
Portable CO2 Fire Extinguishers
  • CO2 Fire Extinguishers must be serviced ashore.
  • On board inspections include external examination for signs of corrosion, weighing and examination of high pressure hose and discharge horn, if the weight loss is more than 10% it should be recharged.

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