(1) At least two fire pumps shall be provided.
(2) If a fire in any one compartment could put
all the fire pumps out of action, there shall be an alternative means
of providing water for fire fighting. In vessels of 75 m in length
and over this alternative means shall be a fixed emergency fire pump
independently driven. This emergency fire pump shall be capable of
supplying two jets of water to the satisfaction of the Administration.
(3)
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(a) The fire pumps, other than the emergency pump,
shall be capable of delivering for fire-fighting purposes a quantity
of water at a minimum pressure of 0.25 N/mm2, with a total
capacity (Q) of at least:
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where L, B and D are
in metres.
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However, the total required capacity of the fire pumps need
not exceed 180 m3/h.
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(b) Each of the required fire pumps other than
any emergency pump shall have a capacity of not less than 40% of the
total capacity of fire pumps required by subparagraph (a) and shall
in any event be capable of delivering at least the jets of water required
by regulation 19(2)(a). These fire
pumps shall be capable of supplying the fire main systems under the
required conditions. Where more than two pumps are installed the capacity
of such additional pumps shall be to the satisfaction of the Administration.
(4)
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(a) Fire pumps shall be independently driven power
pumps. Sanitary, ballast, bilge or general service pumps may be accepted
as fire pumps, provided that they are not normally used for pumping
oil and that, if they are subject to occasional duty for the transfer
or pumping of fuel oil, suitable change-over arrangements are fitted.
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(b) Relief valves shall be provided in conjunction
with all fire pumps if the pumps are capable of developing a pressure
exceeding the design pressure of the water service pipes, hydrants
and hoses. These valves shall be so placed and adjusted as to prevent
excessive pressure in any of the fire main systems.
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(c) Emergency power-operated fire pumps shall
be independently driven self-contained pumps either with their own
diesel engine prime mover and fuel supply fitted in an accessible
position outside the compartment which contains the main fire pumps,
or be driven by a self-contained generator, which may be the emergency
generator referred to in regulation IV/17,
of sufficient capacity and which is positioned in a safe place outside
the engine room and preferably above the working deck. The emergency
fire pump shall be capable of operating for a period of at least 3
h.
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(d) Emergency fire pumps, sea-suction valves and
other necessary valves shall be operable from outside compartments
containing main fire pumps in a position not likely to be cut off
by a fire in those compartments.