Regulation II-2/10.5.6 – Fixed local application
fire-extinguishing systems*
*The fixed local application fire-fighting systems shall be
approved based on the standards contained in the Guidelines for
the approval of fixed water-based local application
fire-fighting systems for use in category A machinery spaces
(MSC/Circ.913).
- The end nozzles of a single line of nozzles should be
positioned:
- outside the hazard where paragraph 3.4.2.1 of the appendix
to the annex to MSC/Circ.913 is applicable, to the distance
established in testing; and
- at the edge or outside of the protected area where paragraph
3.4.2.2 of the appendix to the annex to MSC/Circ.913 is
applicable.
A single nozzle should be located above the fire source and at
the centre of an area having dimensions D/2 x D/2.
Sketches of acceptable arrangements are as follows:
1.1 System (utilizing a 3 x 3 nozzle grid) that extinguishes
fires referred to in paragraphs 3.3.2.1 to 3.3.2.3 of the
appendix to the annex to MSC/Circ.913
For this system, the outer nozzles should be installed outside of
the protected area at a distance of at least 1/4 of the maximum
nozzle spacing.
1.2 System (utilizing a 3 x 3 nozzle grid) that extinguishes
fires referred to in paragraphs 3.3.2.3 to 3.3.2.5 of the
appendix to the annex to MSC/Circ.913
For this system, outer nozzles can be located either at the edge
of the protected area or outside of the protected area.
1.3 System (utilizing a 2 x 2 nozzle grid) that extinguishes
fires referred to in paragraphs 3.3.2.3 to 3.3.2.5 of the
appendix to the annex to MSC/Circ.913
For this system, outer nozzles can be located either at the edge
of the protected area or outside of the protected area.
1.4 A single row of nozzles 1.4.1 System that extinguishes
fires referred to in paragraphs 3.3.2.3 to 3.3.2.5 of the
appendix to the annex to MSC/Circ.913
For this system, the outer nozzles should be placed outside of
the protected area at a distance of at least 1/4 of the maximum
nozzle spacing.
1.4.2 System that extinguishes fires referred to in
paragraphs 3.3.2.1 to 3.3.2.3 of the appendix to the annex
to MSC/Circ.913
1.5 Single nozzle