MARINESHELF RECENT

MARINESHELF

Thursday, October 18, 2012

15PPM BILGE ALARM AND RESOLUTION MEPC.107(49)

MARINESHELF publishes articles contributed by seafarers and other marine related sites solely for the benefit of seafarers .All copyright materials are owned by its respective authors or publishers.


RESOLUTION MEPC.107(49)
Adopted on 18 July 2003
REVISED GUIDELINES AND SPECIFICATIONS FOR POLLUTION
PREVENTION EQUIPMENT FOR MACHINERY SPACE BILGES OF SHIPS
These Guidelines and Specifications apply:
.1 to installations fitted to ships, the keel of which are laid or which are at a
similar stage of construction on or after 1 January 2005; and
.2 to new installations fitted on or after 1 January 2005 to ships, the keel of
which were laid or which were at a similar stage construction before 1
January 2005 in so far as is reasonable and practicable.

4.2 15 ppm Bilge Alarm
4.2.1 These Specifications relate to 15 ppm Bilge Alarms.
4.2.2 The 15 ppm Bilge Alarm should resist corrosion in conditions of the marine
environment.
4.2.3 The 15 ppm Bilge Alarm should, if intended to be fitted in locations where
flammable atmosphere may be present, comply with the relevant safety regulations for such
spaces. Any electrical equipment which is part of the 15 ppm Bilge Alarm should be placed
in a non- hazardous area, or should be certified by the Administration as safe for use in a
hazardous atmosphere. Any moving parts which are fitted in hazardous areas should be
arranged so as to avoid the formation of static electricity.
4.2.4 The 15 ppm Bilge Alarm should not contain or use any substance of a dangerous
nature, unless adequate arrangements, acceptable to the Administration, are provided to
eliminate any hazards introduced thereby.
4.2.5 A ppm display should be provided. The ppm display should not be affected by
emulsions and/or the type of oil given that the test fluid detailed in paragraph 1.2.4 of part 1
of the annex is deemed to represent a mixture that may be expected in the machinery space
bilges of a ship. It should not be necessary to calibrate the 15 ppm Bilge Alarm on board
ship, but onboard testing according to the manufacturers instructions shall be permitted.
The accuracy of the readings should at all times remain within the limit specified in
paragraph 2.2.1 of part 2 of the annex.
4.2.6 The response time of the 15 ppm Bilge Alarm, that is, the time which elapses
between an alteration in the sample being supplied to the 15 ppm Bilge Alarm and the ppm
display showing the correct response, should not exceed 5 seconds.
4.2.7 The 15 ppm Bilge Alarm should be fitted with an electrical/electronic device which
should be pre-set by the manufacturer to activate when the effluent exceeds 15 ppm. This
should also operate automatically if at any time the 15 ppm Bilge Alarm should fail to
function, require a warm- up period or otherwise be de-energized.
4.2.8 It is recommended that a simple means be provided aboard ship to check on
instrument drift, repeatability of the instrument reading, and the ability to re- zero the
instrument.
4.2.9 The 15 ppm Bilge Alarm should record date, time and alarm status, and operating
status of the 15 ppm Bilge Separator. The recording device should also store data for at
least eighteen months and should be able to display or print a protocol for official
inspections as required. In the event the 15 ppm Bilge Alarm is replaced, means should be
provided to ensure the data recorded remains available on board for 18 months.
4.2.10 To avoid wilful manipulation of 15 ppm Bilge Alarms, the following items should be
included:
.1 every access of the 15 ppm Bilge Alarm beyond the essential requirements of
paragraph 4.2.8 requires the breaking of a seal; and
.2 the 15 ppm Bilge Alarm should be so constructed that the alarm is always
activated whenever clean water is used for cleaning or zeroing purposes.
4.2.11 The accuracy of the 15 ppm Bilge Alarms should be checked at IOPP Certificate
renewal surveys according to the manufacturers instructions. Alternatively the unit may be
replaced by a calibrated 15 ppm Bilge Alarm. The calibration certificate for the 15 ppm
Bilge Alarm, certifying date of last calibration check, should be retained onboard for
inspection purposes. The accuracy checks can only be done by the manufacturer or persons
authorized by the manufacturer.

No comments: