This document has been consolidated into MARPOL Annex I, Chapter 3,
Part A, Regulation 12
Chapter 3 - Requirements for machinery spaces of all ships
Part A - Construction
Regulation 12 – Tanks for oil residues (sludge)
Paragraphs 1 to 4 of regulation 12 are replaced by the following:
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"1 Unless indicated otherwise, this regulation applies to every
ship of 400 gross tonnage and above except that paragraph 3.5 of this
regulation need only be applied as far as is reasonable and practicable
to ships delivered on or before 31 December 1979, as defined in regulation 1.28.1.
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2 Oil residue (sludge) may be disposed of directly from the oil
residue (sludge) tank(s) to reception facilities through the standard
discharge connection referred to in regulation 13, or to any other
approved means of disposal of oil residue (sludge), such as an
incinerator, auxiliary boiler suitable for burning oil residues (sludge)
or other acceptable means which shall be annotated in item 3.2 of the
Supplement to IOPP Certificate Form A or B.
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3 Oil residue (sludge) tank(s) shall be provided and:
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.1 shall be of adequate capacity, having regard to the
type of machinery and length of voyage, to receive the oil
residues (sludge) which cannot be dealt with otherwise in
accordance with the requirements of this Annex;
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.2 shall be provided with a designated pump that is
capable of taking suction from the oil residue (sludge) tank(s)
for disposal of oil residue (sludge) by means as described in
regulation 12.2;
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.3 shall have no discharge connections to the bilge
system, oily bilge water holding tank(s), tank top or oily water
separators, except that:
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.1 the tank(s) may be fitted with drains, with
manually operated self-closing valves and arrangements
for subsequent visual monitoring of the settled water,
that lead to an oily bilge water holding tank or bilge
well, or an alternative arrangement, provided such
arrangement does not connect directly to the bilge
discharge piping system; and
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.2 the sludge tank discharge piping and
bilge-water piping may be connected to a common piping
leading to the standard discharge connection referred to
in regulation 13; the connection of both systems to the
possible common piping leading to the standard discharge
connection referred to in regulation 13 shall not allow
for the transfer of sludge to the bilge system;
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.4 shall not be arranged with any piping that has direct
connection overboard, other than the standard discharge
connection referred to in regulation 13; and
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.5 shall be designed and constructed so as to facilitate
their cleaning and the discharge of residues to reception
facilities.
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4 Ships constructed before 1 January 2017 shall be
arranged to comply with paragraph 3.3 of this regulation not later than
the first renewal survey carried out on or after 1 January 2017."