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Part C Machinery, Electricity, Automation and Fire Protection
Chapter 1 Machinery
Section 10 Piping Systems
6 Bilge systems
6.3 Design of bilge systems
- The bilge pumping system is to consist of
pumps connected to a bilge main line so arranged as to allow the draining
of all spaces mentioned in [6.2.1] through bilge branches,
distribution boxes and bilge suctions, except for some small spaces
where individual suctions by means of hand pumps may be accepted
as stated in [6.6.3] and [6.6.4].
- If deemed acceptable by the Society, bilge pumping arrangements
may be dispensed with in specific compartments provided the safety
of the ship is not impaired.
6.3.2 Number and distribution
of bilge suctions
- Draining of watertight spaces is to be possible,
when the ship is on an even keel and either is upright or has a
list of up to 5°, by means of at least:
See also [6.5.5].
- two suctions in machinery spaces,
including one branch bilge suction and one direct suction and, in addition,
for spaces containing propulsion machinery, one emergency bilge
- one suction in other spaces.
- Bilge suctions are to be arranged as follows:
- wing suctions are generally to be
provided except in the case of short and narrow compartments when
a single suction ensures effective draining in the above conditions
- in the case of compartments of unusual form, additional suctions
may be required to ensure effective draining under the conditions
mentioned in item a).
- In all cases, arrangements are to be made such as to allow
a free and easy flow of water to bilge suctions.
6.3.3 Prevention of communication
between spaces Independence of the lines
- Bilge lines are to be so arranged as to
avoid inadvertent flooding of any dry compartment.
- Bilge lines are to be entirely independent and distinct from
other lines except where permitted in [5.4].
- In ships designed for the carriage of flammable or toxic liquids
in enclosed cargo spaces, the bilge pumping system is to be designed
to prevent the inadvertent pumping of such liquids through machinery
space piping or pumps. See also Ch 4, Sec 11, [2.6].
Next: 6.4 Draining of cargo spaces