Location
and separation of spaces
(1) (a) Machinery spaces shall be positioned:
(i) aft of cargo tanks and slop tanks and shall
be separated from them by a cofferdam, cargo pump-room, oil fuel bunker tank or
permanent ballast tank; and
(ii) aft of such cofferdam or cargo pump-room
except that the lower part of a cargo pump-room may be recessed into a
machinery space of Category A in order to accommodate pumps subject to the
crown of the recess being not more than one third of the moulded depth above
the keel and in the case of a ship not exceeding 25,000 tonnes deadweight where
a recess of such height is not practicable for reasons of access and
arrangement of piping, the recess may be increased to a height not exceeding
one half of the moulded depth above the keel, with, in ships constructed on or
after 1 July 2002, the approval of the Director.
(b) Pump-rooms, other than cargo pump-rooms,
containing pumps and fittings for ballasting spaces adjacent to cargo tanks and
slop tanks and pumps and fittings for oil fuel transfer may be considered
equivalent to a cargo pump-room for the purpose of this regulation on condition
that the fire protection arrangements and fire extinguishing arrangements of
those pump-rooms are in accordance with the cargo pump-rooms.
(2) Except
as otherwise permitted by subRules (3), (4) and (5) accommodation spaces,
control stations, main cargo control stations and service spaces other than
isolated lockers for cargo handling gear shall be positioned aft of cargo tanks
and slop tanks and pump rooms or cofferdams which separate cargo tanks and slop
tanks from machinery spaces except that such spaces may be positioned over the
recess of a pump room to which subregulation (1) refers. In ships constructed
on or after 1 July 2002, this arrangement shall be such that a single failure
of a deck or bulkhead does not permit the entry of gas of fumes from the cargo
tanks into main cargo control stations, control stations, or accommodation and
service spaces.
(3) Accommodation
spaces, control stations, main cargo control stations and service spaces may be
positioned forward of the cargo area provided that they are separated from the
cargo tanks and slop tanks by a cofferdam, pump room, or the whole or part of
an oil fuel bunker tank or permanent ballast tank except that such spaces may
be positioned over the recess of a pump room to which subregulation (1) refers.
(4) Navigating
spaces may be positioned above the cargo tanks and slop tanks provided that
they are used only for navigating purposes and are separated from the upper
deck by means of an open space the height of which shall be not less than 2
metres. In ships constructed on or after 1 July 2002, the fire protection
requirements for such a navigation space shall be those required for control
stations, as specified in the Twenty Sixth Schedule to the Merchant Shipping (Fire
Protection: Large Ships Constructed on or after 1 July 2002) Rules 200…,
and other provisions for tankers, as applicable.
(5) Where
accommodation spaces, control stations, cargo stations, and machinery spaces
other than machinery spaces of Category A are located over part of an oil fuel
bunker tank the horizontal separation of such spaces from cargo tanks or slop
tanks shall be to the satisfaction of the Administration.
(6) Means
shall be provided to isolate oil spills on the upper deck from accommodation
and service spaces and shall take into account stern cargo handling facilities
where these are provided. In ships constructed on or after 1 July 2002, this
may be accomplished by provision of a permanent continuous coaming of a height
of at least 300 millimetres extending from side to side.
Additional requirements for
ships constructed on or after1st September 1984
(7) Notwithstanding
subregulation (1) and subject to sub regulation (14) machinery spaces
containing internal combustion machinery having an output greater than 375
kilowatts, other than main propulsion machinery, and provided for the safety of
the ship and machinery spaces other than machinery spaces of Category A may be
positioned forward of the cargo area provided that they are separated from the
cargo tanks and slop tanks in the manner specified in subregulation (1) for
machinery spaces positioned aft of such tanks.
(8) (a) In combination carriers when the slop is
carried on dry cargo voyages the slop tanks shall be surrounded by cofferdams
except where the boundaries of the slop tanks are the hull, main cargo deck,
cargo pump room bulkhead or oil fuel bunker tank.
(b) Such cofferdams shall not be open to a double
bottom, pipe tunnel, pump room or other enclosed space and shall be provided
with means of being filled with water and of being drained. Where the boundary
of a slop tank is the cargo pump room bulkhead the pump room shall not be open
to any double bottom, pipe tunnel or other enclosed space except that bolted
gas-tight access covers may be permitted. In ships constructed on or after 1
July 2002, such cofferdams shall not be used for cargo or ballast and shall not
be connected to piping systems serving oil cargo or ballast.
(9) The
piping between the slop tanks and the pump room on combination carriers shall
be provided with isolating arrangements located adjacent to the slop tanks or,
where such an arrangement is impracticable, within the pump room at the
position where the piping penetrates the bulkhead and the isolating
arrangements shall be either a valve and a spectacle flange or a spool piece
and blank flanges.
(10) A
separate pumping arrangement shall be provided on combination carriers for
discharging the contents of the slop tanks to a connection located above the
main deck.
(11) The
slop tank hatches and cleaning openings on combination carriers shall be on the
open deck and, unless such openings are closed by bolted watertight plates,
shall be provided with locking arrangements which shall be under the control of
a ship's officer.
(12) Cargo
oil pipes installed below deck on combination carriers shall be located within
wing cargo tanks except that when cargo wing tanks are not provided the Administration
may permit the installation of such pipes in ducts which shall be capable of
being adequately cleaned and ventilated. In ships constructed on or after 1
July 2002, where cargo wing tanks are not provided, cargo oil lines below deck
shall be placed in special ducts.
Additional requirements for
ships constructed on or after 1 July 1998
(13) (a) Where there is permanent access from a pipe
tunnel to the main pump-room, a watertight door shall be fitted complying with
the requirements of regulation 18(2) and, in addition to bridge operation, the
watertight door shall be capable of being manually closed from outside the main
pump-room entrance.
(b) The watertight door referred to in
subsubregulation (a) above shall be kept closed during normal operations of the
ship except when access to the pipe tunnel is required.
Additional requirements for
ships constructed on or after 1 July 2002
(14) (a) In addition to the requirements of sub
regulation (7), where the machinery spaces contain internal combustion
machinery-
(i) one approved foam-type extinguisher of at
least 45 litres capacity or equivalent shall be arranged in addition to
portable fire extinguishers; or
(ii) where operation of a semi-portable fire
extinguisher is impracticable, this fire extinguisher may be replaced by two
additional portable fire extinguishers.
(b) Main cargo control stations, control stations
and accommodation and service spaces shall be arranged in such a way that a
single failure of a deck or bulkhead shall not permit the entry of gas or fumes from the cargo tanks into
such spaces.
(15) Instead
of meeting the requirements of sub regulation (10), in ships constructed on or
after 1 July 2002, a separate permanently installed pumping and piping
arrangement incorporating a manifold, provided with a shut-off valve and a
blank flange, shall be provided for discharging the contents of the slop tanks
directly to the open deck for disposal to shore reception facilities when the
ship is in the dry cargo mode. When the transfer system is used for slop
transfer in the dry cargo mode, it shall have no connection to other systems;
separation from other systems by means of removal of spool pieces may be
accepted.
Requirements for tankers
constructed on or after 1 September 1984
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