.m107 .mepc107 .mepc 107
MEPC 107 (49) Implemented from 1 January 2005
The outline of major revisions on the guideline:
(1) The 15ppm Bilge Separator
(i) The feed to emulsified bilge water should not result in the discharge overboard of any mixture containing more than 15ppm of oil.
(ii) Fail-safe arrangements to avoid any discharge in case of malfunction should be provided.
(2) The 15ppm Bilge Alarm
(i) The ppm display should not be affected by emulsions and/or the type of oil.
(ii) The response time of the 15ppm Bilge Alarm should not exceed 5 seconds (before it was 20 seconds)
(iii)The 15ppm Bilge Alarm should have a recording device which will
> record date, time and alarm status, and operating status of the 15ppm Bilge Separator.
The recording device should
> store data for at least eighteen months and should be able to display or print a protocol for official inspections as required.
(iv) willful manipulation of 15ppm Bilge Alarms is prevented . Every access of the 15ppm Bilge Alarm beyond the essential maintenance requires the breaking of a seal; and
(b) the 15ppm Bilge Alarm should be so constructed that the alarm is always activated whenever clean water is used for cleaning or zeroing purposes.
(3) Relevant piping arrangements
(i) Automatic stopping device
→The automatic stopping device should have a recirculating valve arrangement installed in the effluent outlet line of 15ppm bilge separator. When the oil content of the effluent exceeds 15ppm the device will automatically diverts the effluent mixture from being discharge overboard back to the ship’s bilges or bilge tank
→The means by stopping of bilge pump will not permitted.
(ii) Re-circulating facilities
Re-circulating facilities should be provided, after and adjacent to the overboard outlet of the stopping device to enable the 15ppm Bilge Separator system, the 15ppm Bilge Alarm and the automatic stopping device, to be tested with the overboard discharge closed.
(iii) Capacity of the supply pump
→The capacity of the supply pump should not exceed 110% (150% previously) of the rated capacity of the 15ppm Bilge Separator with
→ size of pump and motor, to be stated on the Certificate of Type Approval.
(iv) Overall response time
Overall response time between an effluent discharge from the 15ppm Bilge Separator exceeding 15ppm, and the operation of the Automatic Stopping Device preventing overboard discharge, should be as short as possible (including the response time of the 15ppm Bilge Alarm).The maximum time is 20 seconds (it was 40 seconds previously).
(v) Sampling point
For future inspection purposes on board ship, a sampling point should be provided in a vertical section of the water effluent piping (from the center of pipe) as close as is practicable to the 15ppm Bilge Separator outlet.
(vi) The arrangement for the extraction of samples to the 15ppm Bilge Alarm
The arrangement for the extraction of samples from the 15ppm Bilge Separator discharge line to the 15ppm Bilge Alarm should give a truly representative sample of the effluent with an adequate pressure and flow. The Sample should be taken from the center of a vertical section of the water effluent piping.)
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(4) Others
(i) Operating and Maintenance manuals
A vessel fitted with a 15ppm Bilge Separator and a 15ppm Bilge Alarm should have a copy of Operating and Maintenance manuals. on board
(ii) Calibration of 15ppm Bilge Alarms
The accuracy of the 15ppm Bilge Alarms should be checked at IOPP annual/intermediate/renewal surveys (checked at IOPP Certificate renewal surveys) according to the manufacturer’s instructions.
Alternatively, the unit may be replaced by a calibrated 15ppm Bilge Alarm.
The calibration certificate for the 15ppm Bilge Alarm should have the certifying date of last calibration check. It should be kept onboard for inspection purposes.
The accuracy checks can only be done by the manufacturer or persons authorized by the manufacturer.
MEPC.285(70) – amendment to MEPC 107(49):
The latest amendment to MEPC.107(49) is Resolution MEPC.285(70), which was adopted on October 28, 2016
Main Changes
- Reference Updates: The amendment replaced references to “regulation 16” with “regulation 14” in several paragraphs, including 1.2.1, 1.2.2.1, 2.1, and 3.1
- Calibration Requirements: The most significant change was to section 4.2.11, which deals with the calibration and testing of 15 ppm bilge alarms.
The new requirements are:
- Calibration certificates should be checked at IOPP annual/intermediate/renewal surveys.
- Accuracy of 15 ppm bilge alarms must be checked by calibration and testing.
- This should be done by the manufacturer or authorized persons.
- The interval between checks should not exceed five years after commissioning, or within the term specified by the manufacturer, whichever is shorter.
- Alternatively, the unit may be replaced by a calibrated 15 ppm bilge alarm.
- The calibration certificate, showing the date of the last calibration check, must be kept on board for inspection.