2.1 Steel Construction: Vessels which have the
machinery space boundaries constructed of steel, require no additional
fire protection. However, the surfaces of machinery space bulkheads
that are outside of the machinery space shall be coated only with
finishes which meet the requirements for low flame spread when tested
in accordance with Resolution A.653 (16) of
the International Maritime Organizationfootnote.
2.2 Fibre Reinforced Plastic (FRP) Construction:
Machinery space boundaries should prevent the passage of smoke and
flame for 15 minutes, when tested in accordance with the procedure
shown in
Annex 4
. Fire
resistance of FRP may be achieved by the use of woven roving glass
layers or additives to the resin, or by insulation. Intumescent polyester
resin surface coatings may also be used; however, solvent-borne intumescent
paints shall not be used. The Administration may waive the requirement
for the test described in
Annex 4
where
the construction complies with an ISO or equivalent standard to give
at least the same level of protection.
2.3 Aluminium and Wood Construction: Machinery
space boundaries shall have an equivalent level of fire protection
when compared with GRP construction as required in regulation V/2.2.
2.4 Machinery space boundaries shall be as gastight
as practicable so that in the event of a fire the fire extinguishing
medium released or injected can be retained for sufficient time to
extinguish the fire.
2.5 Where it is not practical to have a machinery
space, the engine shall be enclosed in a box. The box shall perform
the same function as the machinery space boundaries in regulation V/2.4.
2.6 Portlights or windows shall not be fitted
in the boundary of the machinery space, except that an observation
port having a maximum diameter of 150mm may be fitted, provided the
frame is constructed of steel or brass and the port is fitted with
a permanently attached steel or brass cover with securing arrangements.