.1 The system should be capable of fire suppression
based on testing conducted in accordance with the appendix to these
Guidelines. Any installation of nozzles on board should reflect the
arrangement successfully tested in accordance with the appendix to
these Guidelines. If a specific arrangement of the nozzles is foreseen
on board, deviating from the one tested, it can be accepted provided
such arrangement additionally passes fire tests based on the scenarios
of these Guidelines.
.2 The location, type and characteristics of the
nozzles should be within the limits tested in accordance with the
appendix to these Guidelines. Nozzle positioning should take into
account obstructions to the spray of the fire-fighting system. The
use of a single row of nozzles or single nozzles may be accepted for
installation where this gives adequate protection according to paragraph
3.4.2.4 of the appendix.
.3 The piping system should be sized in accordance
with a hydraulic calculation technique such as the Hazen-Williams
hydraulic calculation techniquefootnote and
the Darcy-Weisbach hydraulic calculation technique, to ensure availability
of flows and pressures required for correct performance of the system.
.4 The system may be grouped into separate sections
within a protected space. The capacity and design of the system should
be based on the section demanding the greatest volume of water. In
any case the minimum capacity should be adequate for a single section
protecting the largest single engine, diesel generator or piece of
machinery. In multi-engine installations, at least two sections should
be arranged.
.5 Nozzles and piping should not prevent access
to engine or machinery for routine maintenance. In ships fitted with
overhead hoists or other moving equipment, nozzles and piping should
not be located to prevent operation of such equipment.