Vessel Fire Safety Regulations (SOR/2017-14)

347 (1) For the purposes of subsection 339(2), in the case of a fixed aerosol fire-extinguishing system,

• (a) “certified for marine use by a product certification body” is to be read as “certified for marine use by a product certification body in accordance with the standard NFPA 2010, entitled Standard for Fixed Aerosol Fire Extinguishing Systems,”; and

• (b) for the purpose of maintenance of the generator, a machinery space is to be considered a severe environment.

(2) The quantity of aerosol in a fixed aerosol fire-extinguishing system that serves a machinery space must be sufficient to protect the space. The required quantity of aerosol must be calculated using the minimum expected ambient temperature in the space, the design application density of the aerosol, the net volume of the space and, if the system uses a condensed aerosol, the efficiency of the system’s generator.

(3) The design application density of the aerosol must be at least 30% above the extinguishing application density, when the extinguishing application density of the aerosol is determined by full-scale testing.

(4) The net volume of the machinery space is its gross volume, including the volume of the bilge, the volume of the casing, and the volume of free air contained in compressed air receivers that can be released into the space in the event of a fire, minus the volume of objects in the space.

(5) The fixed fire-extinguishing system must release a sufficient quantity of aerosol to allow the design application density of the aerosol to be reached in 120 seconds or less in the machinery space.