4


Foam fire- extinguishing systems - visually inspect all accessible components for


proper condition;


- functionally test all fixed system audible alarms;


- flow test all water supply and foam pumps for proper pressure and capacity, and confirm flow at the required pressure in each section (Ensure all piping is thoroughly flushed with fresh water after service.);


- test all system cross connections to other sources of water supply for proper operation;


- verify all pump relief valves, if provided, are properly set;


- examine all filters/ strainers to verify they are free of debris and contamination;


- verify all control/ section valves are in the correct position;


- blow dry compressed air or nitrogen through the discharge piping or otherwise confirm the pipework and nozzles of high expansion foam systems are clear of any obstructions, debris and contamination. This may require the removal of nozzles, if applicable;


- take samples from all foam concentrates carried on board and subject them to the periodical control tests in MSC.1/Circ.1312, for low expansion foam, or MSC/Circ.670 for high expansion foam. (Note: Except for alcohol-resistant foam, the first test need not be conducted until 3 years after being supplied to the ship.); and


- test all fuel shut-off controls connected to fire-protection systems for proper operation.


5


Water mist, water spray and sprinkler systems - verify proper operation of all water mist, water-spray and sprinkler systems using the test valves for each section;


- visually inspect all accessible components for proper condition;


- externally examine all high pressure cylinders for evidence of damage or corrosion;


- check the hydrostatic test date of all high pressure cylinders;


- functionally test all fixed system audible and visual alarms;


- flow test all pumps for proper pressure and capacity;


- test all antifreeze systems for adequate freeze protection; - test all system cross


connections to other sources of water supply for proper operation;


- verify all pump relief valves, if provided, are properly set;


- examine all filters/strainers to verify they are free of debris and contamination;


- verify all control/section valves are in the correct position;


- blow dry compressed air or nitrogen through the discharge piping of dry pipe systems, or otherwise confirm the pipework and nozzles are clear of any obstructions. This may require the removal of nozzles, if applicable;


- test emergency power supply switchover, where applicable;


- visually inspect all sprinklers focusing in areas where sprinklers are subject to aggressive atmosphere (like saunas, spas, kitchen areas) and subject to physical (like luggage handling areas, gyms, play rooms, etc.) so that all sprinklers are inspected within one year. Sprinklers with obvious external damage, including paint, must be replaced;


- check for any changes that may affect the system such as obstructions by ventilation ducts, pipes, etc.;


- test a minimum of one section in each open head water mist system by flowing water through the nozzles.


- The sections tested should be chosen so that all sections are tested within a five-year period; and test automatic and automatic water mist nozzles in accordance with the flow chart included in MSC.1/Circ.1516.


THE REPORT | SEP 2025 | ISSUE 113 | 103


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