9.2 Arrangement of Oil Fuel, Lubricating Oil and Other Flammable Oil
9.2.1 The provisions of 6.1.1.2.2 apply to the use of oil as fuel.
9.2.2 Oil fuel, lubricating oil and other flammable oil lines should be screened or
otherwise suitably protected to avoid, as far as practicable, oil spray or oil leakages
onto hot surfaces, into machinery air intakes or other sources of ignition. The number
of joints in such piping systems should be kept to a minimum. Flexible pipes carrying
flammable liquids should be of an approved type.footnote
9.2.3 Fuel oil, lubricating oils and other flammable oils should not be carried forward
of public spaces and crew accommodation.
9.2.4 Oil fuel arrangements
In a craft in which oil fuel is used, the arrangements for the storage, distribution and
utilization of the oil fuel should be such as to ensure the safety of the craft and
persons on board and should at least comply with the following provisions.
9.2.4.1 As far as practicable, all parts of the oil fuel system containing oil under
pressure exceeding 0.18 N/mm2 should not be placed in a concealed position
such that defects and leakage cannot readily be observed. The machinery spaces in way of
such parts of the oil fuel system should be adequately illuminated.
9.2.4.2 The ventilation of machinery spaces should be sufficient under all normal
conditions to prevent accumulation of oil vapour.
9.2.4.3 Location of fuel tanks should be in accordance with 6.1.4.2.2.
9.2.4.4 No oil fuel tank should be situated where spillage or leakage therefrom can
constitute a hazard by falling on heated surfaces. Reference is made to the fire safety
requirements in 6.1.4.2.
9.2.4.5 Oil fuel pipes should be fitted with cocks or valves in accordance with
6.1.4.2.3.
9.2.4.6 Every fuel tank should, where necessary, be provided with save-alls or gutters
to catch any fuel which may leak from such tanks.
9.2.4.7 Safe and efficient means of ascertaining the amount of oil fuel contained in any
oil fuel tank should be provided.
9.2.4.7.1 Fuel-level gauges and indicators should be installed and be of a type
acceptable to the Administration. Such means should not allow overfilling of the tanks
that will permit release of fuel. The use of cylindrical gauge glasses should be
prohibited.
9.2.4.8 Provision should be made to prevent overpressure in any oil tank or in any part
of the oil fuel system, including the filling pipes. Any relief valves and air or
overflow pipes should discharge to a safe position and, for fuel of flashpoint less than
43°C, should terminate with flame arresters in accordance with the standard developed by
the Organization.footnote
9.2.4.9 Subject to 9.2.4.10, oil fuel pipes and their valves and fittings should be of
steel or other approved material, except that restricted use of flexible pipes should be
permissible in positions where the Administration is satisfied that they are necessary.
Such flexible pipes and end attachments should be of approved fire-resisting materials
of adequate strength and should be constructed to the satisfaction of the
Administration.
9.2.4.10 High-pressure oil fuel pipes and their valves and fittings should be of
seamless steel construction and should be protected with a jacketed piping system
capable of containing and collecting fuel from a high pressure line failure.
9.2.5 Lubricating oil arrangements
The arrangements for the storage, distribution and utilization of oil used in pressure
lubrication systems should be such as to ensure the safety of the craft and persons on
board. The arrangements made in machinery spaces and, whenever practicable, in auxiliary
machinery spaces should at least comply with the provisions of 9.2.4.1 and 9.2.4.4 to
9.2.4.8 except that:
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.1 this does not preclude the use of sight-flow glasses in lubricating systems
provided they are shown by test to have a suitable degree of fire resistance;
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.2 sounding pipes may be permitted in machinery spaces if fitted with appropriate
means of closure; and
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.3 lubricating oil storage tanks with a capacity of less than 500
l may be permitted without remote operated valves as required in
9.2.4.5.
9.2.6 Arrangements for other flammable oils
The arrangements for storage, distribution and utilization of other flammable oils
employed under pressure in power transmission systems, control and activating systems
and heating systems should be such as to ensure the safety of the craft and persons on
board. In locations where means of ignition are present, such arrangements should at
least comply with the provisions of 9.2.4.4 and 9.2.4.7 and with the provisions of
9.2.4.8 and 9.2.4.9 in respect of strength and construction.
9.2.7 Arrangements within machinery spaces
In addition to the provisions of 9.2.1 to 9.2.6, the oil fuel and lubricating oil
systems should comply with the following.
9.2.7.1 Any equipment used to store or transfer flammable liquids automatically or
remotely should have arrangements to prevent overflow spillages.
9.3 Bilge Pumping and Drainage Systems
9.3.1 Arrangements should be made for draining any watertight compartment other than the
compartments intended for permanent storage of liquid. Where, in relation to particular
compartments, drainage is not considered necessary, drainage arrangements may be
omitted, but it should be demonstrated that the safety of the craft will not be
impaired.
9.3.2 Bilge pumping arrangements should be provided to allow every watertight
compartment located below the water level in the worst anticipated damage condition
other than those intended for permanent storage of liquid to be drained. The capacity or
position of any such compartment should be such that flooding thereof could not affect
the safety of the craft.
9.3.3 The bilge pumping system should be capable of operation under all possible values
of list and trim after the craft has sustained the damage in 1.1.4.5. The bilge pumping
system should be so designed as to prevent water flowing from one compartment to
another. The necessary valves and pumps for operation of the bilge system arranged for
any compartment should be capable of being operated from the operating compartment.
9.3.3.1 At least two power pumps connected to the main bilge system should be provided,
one of which may be driven by the propulsion machinery. If the Administration is
satisfied that the safety of the craft is not impaired, bilge pumping arrangements may
be dispensed with in particular compartments. Alternatively, the arrangement may be in
accordance with the provisions of 9.3.12.
9.3.3.2 On multi-hull craft each hull should be provided with at least two power pumps,
unless a bilge pump in one hull is capable of pumping bilge in the other hull. At least
one pump in each hull should be an independent power pump.
9.3.4 The power operated self-priming bilge pumps may be used for other duties such as
firefighting or general service but not for pumping fuel or other flammable liquids.
9.3.5 Each power bilge pump should be capable of pumping water through the required
bilge pipe at a speed of not less than 2 m/s.
9.3.6 The diameter (dB) of the bilge main should be calculated according to the
following formula, except that the actual internal diameter of the bilge main may be
rounded off to the nearest size of a recognized standard:
9.3.7 Internal diameters of suction branches should meet the requirements of the
Administration but should not be less than 25 mm. Suction branches should be fitted with
effective strainers.
9.3.8 Sea inlet valves should be capable of being closed from the operating compartment.
9.3.9 All bilge suction piping up to the connection to the pumps should be independent
of other piping.
9.3.10 Any space for which bilge pumping arrangements are required should be provided
with a bilge alarm.
9.3.11 For craft with individual bilge pumps, the total capacity Q of the bilge pumps
for each hull should not be less than 2.4 times the capacity of the pump defined in
9.3.5 and 9.3.6.
9.3.12 In bilge pumping arrangements where a bilge main is not provided, at least one
fixed submersible pump should be provided for each space. The capacity of each pump
should be determined by the formula:
9.3.13 Non-return valves should be fitted in the following components:
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.1 bilge valve distribution manifolds;
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.2 bilge suction hose connections where fitted directly to the pump or to the main
bilge suction pipe; and
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.3 direct bilge suction pipes and bilge pump connections to main bilge suction
pipe.