3.1.1 Tanks containing cargo or residues of cargo
subject to the provisions of the Guidelines should be segregated from
machinery spaces, propeller shaft tunnels, if fitted, dry cargo spaces,
accommodation and service spaces and from drinking water and stores
for human consumption, by means of a cofferdam, void space, cargo
pump-room, empty tank, oil fuel tank, or other similar space. On-deck
stowage of independent tanks or installing independent tanks in otherwise
empty hold spaces should be considered as satisfying this requirement.
3.1.2 Cargoes which react in a hazardous manner
with other cargoes or oil fuels should:
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.1 be segregated from such other cargoes or oil
fuels by means of a cofferdam, void space, cargo pump-room, empty
tank, or tank containing a mutually compatible cargo;
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.2 have separate pumping and piping systems which
should not pass through other cargo tanks containing such cargoes,
unless encased in a tunnel; and
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.3 have separate tank venting systems.
3.1.3 Cargo piping should not pass through any
accommodation, service or machinery space other than cargo pump-rooms
or pump-rooms.
3.1.4 Pumps, ballast lines, vent lines and other
similar equipment serving permanent ballast tanks should be independent
of similar equipment serving cargo tanks.
3.1.5 Bilge pumping arrangements for cargo pump-rooms
or for hold spaces in which independent cargo tanks are installed
should be situated entirely within the cargo area.
Segregation requirements for integral tanks
3.1.6 Where not bounded by bottom shell plating,
fuel oil tanks, a cargo pump-room or a pump-room, the cargo tanks
should be surrounded by cofferdams. Tanks for other purposes (except
fresh water and lubricating oils) may be accepted as cofferdams for
these tanks.
3.1.7 For access to all spaces, the minimum spacing
between cargo tank boundaries and adjacent ship's structures should
be 600 mm.
3.1.8 Cargo tanks may extend to the deck plating,
provided dry cargo is not handled in that area. Where dry cargo is
handled on the deck area above a cargo tank, the cargo tank may not
extend to the deck plating unless a continuous, permanent deck sheathing
of wood or other suitable material of appropriate thickness and construction
is fitted to the satisfaction of the Administration.
3.1.9 Cargoes subject to the Guidelines should
not be carried in either the fore or aft peak tanks.
3.1.10 For pollution hazard only substances having
a flashpoint exceeding 60°C (closed cup test) the Administration
may waive the arrangements referred to in 3.1.1 and 3.1.3 provided
that the segregation requirements for accommodation spaces, drinking
water and stores for human consumption are observed. Additionally,
3.1.6 and 3.1.7 need not be applied.