CHAPTER 8 OF THE FSS CODE
Automatic sprinkler, fire detection and fire alarm systems
For sizing the sprinkler pumps and pressure tank, the calculation method should be as
follows:
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.1 for sprinkler systems in accordance with chapter 8 of the FSS
Code, the pump capacity and pressure tank volume should be calculated by
multiplying the 5 l/m2/min application rate times the area of 280
m2;
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.2 for equivalent sprinkler systems, the pump capacity and pressure
tank volume, or other means meeting the functional requirements stipulated in
paragraph 2.3.2.1 of chapter 8 of the FSS
Code should be calculated by multiplying the highest application rate of
the most hydraulically demanding area at the minimum design pressure, as
determined by full scale fire testing according to the Revised guidelines for
approval of sprinkler systems equivalent to that referred to in SOLAS regulation II-2/12 (resolution A.800(19)), as amended by resolution MSC.265(84), times the area of 280 m2. In cases where
multiple types of spaces are located within the hydraulically most demanding 280
m2 area, the application rate of each respective area should be
applied;
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.3 for application to a ship with the largest area separated from
adjacent spaces by A-class divisions of less than 280 m2, the area
required when sizing pumps and alternate supply components is the largest given
area; and
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.4 for application to a ship with a total protected area of less than
280 m2 the Administration may specify the appropriate area for sizing
of pumps and alternate supply components.