Hong Kong Regulations

MERCHANT SHIPPING (PREVENTION OF OIL POLLUTION) REGULATIONS - SCHEDULE 3

SPECIFICATIONS FOR POLLUTION PREVENTION EQUIPMENT FOR MACHINERY SPACE BILGES OF SHIPS

(Past version on 30/06/1997).

[regulations 14 & 20(3)]

1 INTRODUCTION

1.1 General

1.1.1 The specifications in respect of oil filtering equipment are considered
to be applicable for use in conjunction with oily bilge-water and ballast
water from fuel oil tanks, as these are of a low or medium capacity, and are
conditioned by the need to avoid discharging oily  mixtures with an oil
content of more than 15 ppm of the mixture.

1.1.2 The development and testing of high capacity separating  equipment
designed for dealing with effluent from cargo tanks on tankers poses special
problems and such equipment does not require to be tested under these
specifications. Such development and tests should not be hindered and the
Director is prepared to accept deviations from these specifications when they
are considered necessary in this context.

1.1.3 Gravitational filtering equipment cannot be expected to be effective
over the complete range of oils which might be carried on board ship, nor can
it deal satisfactorily with oil of very high relative density or with a
mixture presented to it as an emulsion. Cleansing agents used for cleaning
purposes in machinery spaces may cause these emulsions in bilge water. To
avoid this, only those cleansing agents which do not affect the performance of
the equipment should be used, and care should be taken that the bilge water is
fed to the filtering equipment after the emulsion has broken. Considering that
not all designs of equipment are affected in the same way by cleansing agents,
the manufactures of filtering and monitoring equipment should supply
recommendations concerning the use of cleansing agents, and these
recommendations should be followed in shipboard practice.

1.1.4 Where a range of filtering equipment of the same design, but of
different capacities, requires certification in accordance with these
specifications, and where the largest capacity in the range does not exceed 50
m 3 per hour, the Director may accept tests in 2 capacities within the range,
in lieu of tests on every size, providing that the 2 tests actually performed
are from the lowest quarter and highest quarter of the range.

1.2 Purpose

1.2.1 These Specifications contain requirements regarding the design,
installation, performance and testing of pollution prevention equipment
required by regulation 14.

1.2.2 The purpose of these Specifications is- .1 to provide a uniform
interpretation of the requirements of regulation 14; .2 to assist in
determining appropriate design, construction and operational parameters for
pollution prevention equipment when such equipment is fitted in ships; .3 to
define test and performance requirements for pollution prevention equipment;
and .4 to provide guidance for installation requirements.

1.3 Applicability

1.3.1 These Specifications apply- .1 to installations fitted to ships, the
keels of which are laid or which are at a similar stage of construction on or
after 30 April 1994; and .2 to new installations fitted on or after 30 April
1994 to ships, the keels of which were laid or which were at a similar stage
of construction before 30 April 1994 in so far as is reasonable and
practicable.

1.3.2 Installations fitted to ships the keels of which were laid or which were
at a similar stage of construction before 30 April 1994 should comply either
with the requirements contained in the Specifications adopted under the IMO
resolution A.393(X) or with the requirements contained in these
Specifications.

1.4 Summary of requirements

1.4.1 The approval requirements for pollution prevention equipment specified
in these Specifications are summarized below- .1 the oil filtering equipment
should be tested for type approval in accordance with the procedures described
in Part 1 of the Annex, subject to environmental tests specified Part 3 of the
Annex; and .2 the oil content meter for the bilge alarms should be tested for
type approval in accordance with Part 2 of the Annex, subject to the
environmental tests specified in Part 3 of the Annex.

2 BACKGROUND

2.1 The requirements relating to pollution prevention equipment for ships are
set out in regulation 14, which stipulates that ships of 400 tons gross
registered tonnage and above should be installed with approved equipment.

2.2 Regulation 14(6) stipulates that the effluent from oil filtering equipment
should not exceed 15 ppm. The bilge alarm shall activate to indicate when this
level cannot be maintained.

3 DEFINITIONS

3.1 Pollution prevention equipment

3.1.1 For the purpose of these Guidelines and Specifications pollution
prevention equipment installed in a ship in compliance with regulation 14
comprises- .1 oil filtering equipment (15 ppm); and .2 15 ppm bilge alarms.

3.2 Oil filtering equipment

3.2.1 Oil filtering equipment may include any combination of a separator,
filter or coalescer, and also a single unit designed to produce an effluent
with oil content not exceeding 15 ppm.

3.3 Bilge alarm

3.3.1 The bilge alarm arrangements specified in regulation 14(6) are referred
to in these Specifications as a "bilge alarm".

3.4 ppm

3.4.1 "ppm" (百萬分之) means parts of oil per million parts of water by
volume.

4 TECHNICAL SPECIFICATIONS

4.1 Oil filtering equipment

4.1.1 The equipment should be strongly constructed and suitable for shipboard
use, bearing in mind its intended location on the ship.

4.1.2 It should, if intended to be fitted in locations where flammable
atmospheres may be present, comply with the relevant safety regulations for
such spaces. Any electrical equipment which is part of the equipment should be
placed in a non-hazardous area, or should be certified by the Director as safe
for use in a hazardous area. Any moving parts which are fitted in hazardous
areas should be arranged so as to avoid the formation of static electricity.

4.1.3 The equipment should be so designed that it functions automatically.
However, provisions should be made for emergency manual control.

4.1.4 Changing the feed to the oil filtering equipment from oily-water to oil,
or from oil and/or water to air should not result in a discharge overboard of
any mixture containing more than 15 ppm of oil.

4.1.5 The system should require the minimum of attention to bring it into
operation. In the case of equipment used for engine room bilges, there should
be no need for any adjustment to valves and other equipment to bring the
system into operation, and when fitted in unattended machinery spaces the
equipment should be capable of operating for at least 24 hours of normal duty
without attention.

4.1.6 All working parts of the equipment which are liable to wear or to damage
should be easily accessible for maintenance.

4.2 Oil content meters

4.2.1 These Specifications relate to oil content meters for bilge alarms.

4.2.2 The meters should resist corrosion in conditions of the marine
environment.

4.2.3 The meters should, if intended to be fitted in locations where flammable
atmospheres may be present, comply with the relevant safety regulations for
such spaces. Any electrical equipment which is part of the meter should be
placed in a non-hazardous area, or should be certified 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 meter should not contain or use any substance of a dangerous nature,
unless adequate arrangements, acceptable to the Director, are provided to
eliminate any hazards introduced thereby.

4.2.5 It is desirable that the reading should not be affected by the type of
oil. If it is, it should not be necessary to calibrate the meter on board
ship, but pre-set alterations in the calibration in accordance with
instructions drawn up at the time of manufacture are permitted. In the latter
case, means should be available to check that the correct calibration has been
selected for the oil in question. 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 meter, that is, the time which elapses between
an alteration in the sample being supplied to the meter and the meter showing
the correct response, should not exceed 20 seconds.

4.2.7 The meter should be fitted with an alarm device which can be set to
operate automatically at any pre-stated value either to alert the crew of the
ship or to operate control valves. The meter for the bilge alarm should be
fitted with an alarm device which should be pre-set by the manufacturer to
activate when the effluent exceeds 15 ppm. These alarms should also operate
automatically if at any time the meter 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, and to confirm the accuracy and repeatability of the
instrument reading.

5 SPECIFICATIONS FOR TYPE APPROVAL TESTING OF POLLUTION PREVENTION EQUIPMENT

5.1 Testing requirements

5.1.1 The production model of pollution prevention equipment, for which the
approval will apply, should be identical to the equipment, type-tested in
accordance with the Test and Performance Specifications contained in Part 1 or
2 of the Annex to these Specifications. The equipment should also be
type-tested in accordance with the specifications for environmental testing
contained in Part 3 of the Annex.

5.2 Approval and certification procedures

5.2.1 Pollution prevention equipment which in every respect fulfils the
requirements of these Specifications may be approved by the Director for
fitting on board ships. The approval should take the form of a certificate of
type approval specifying the main particulars of the apparatus and any
limiting conditions on its usage necessary to ensure its proper performance.
Such certificate should be issued in the format shown in Part 5 of the Annex.
A copy of the certificate of type approval for pollution prevention equipment
should be carried on board ships fitted with such equipment at all times.

5.2.2 A certificate of type approval for an oil content meter should be issued
for the bilge alarm.

5.2.3 Approved pollution prevention equipment may be accepted by other
countries for use on their vessels on the basis of the first trials, or after
new tests carried out under the supervision of their own representatives.
Should equipment pass a test in one country but fail a test of a similar
nature in another country, then the 2 countries concerned should consult one
another with a view to reaching a mutually acceptable agreement.

6 INSTALLATION REQUIREMENTS

6.1 Oil filtering equipment

6.1.1 For future inspection purposes on board ship, a sampling point should be
provided in a vertical section of the water effluent piping as close as is
practicable to the equipment outlet. Recirculating facilities should be
provided to enable the oil filtering equipment to be tested with the overboard
discharge closed at initial and periodic surveys.

6.1.2 Means should be taken to ensure that, in practice, the rated capacity of
the equipment is not exceeded by- .1 connecting only pumps of a capacity equal
to, or less than, that of the equipment; or .2 permanently restricting the
discharge to the equipment where larger pumps may be connected.

6.1.3 In any case, equipment should not be supplied from a pump which has a
capacity more than 1.5 times the rated capacity of the equipment.

6.1.4 The equipment should be fitted with a permanently attached plate giving
any operational or installation limits considered necessary by the
manufacturer or the Administration.

6.2 Oil content meters for bilge alarms

6.2.1 The layout of the shipboard installation should be arranged so that the
overall response time between an alteration in the mixture being pumped and
the alteration in the meter reading should be as short as possible and in any
case not more than 40 seconds, to allow for remedial action being taken before
the oil content of the mixture being discharged exceeds the permissible limit.

6.2.2 The arrangement on board ship for the extraction of samples from the
discharge line to the meter should give a truly representative sample of the
effluent. Sampling points should be arranged in all discharge pipes which have
to be monitored for compliance with these Regulations.

6.2.3 Where these Regulations require records, the oil content meter should be
so designed and constructed that any operation carried out on the oil
filtering equipment is automatically registered by the meter.

ANNEX

This Annex provides detailed Test and Performance Specifications for pollution
prevention equipment and contains-

Part 1- Test and Performance Specifications for Type Approval of Oil
Filtering Equipment Part 2- Test and Performance Specifications for Type
Approval of Oil Content Meters for Bilge Alarms Part 3- Specifications for
Environmental Testing for Type Approval of Pollution Prevention Equipment Part
4- Method for the Determination of Oil Content Part 5- Documentation of
Approval

PART 1

TEST AND PERFORMANCE SPECIFICATIONS FOR TYPE APPROVAL OF OIL FILTERING
EQUIPMENT

1.1 General

1.1.1 These Test and Performance Specifications for Type Approval relate to
oil filtering equipment. In addition, the electrical and electronic systems of
the equipment should be tested in accordance with the Specifications for
Environmental Testing contained in Part 3 of this Annex.

1.1.2 The equipment being tested should comply with the relevant requirements
of the technical specifications contained in section 4.1 of these
Specifications.

1.2 Test specifications

1.2.1 These Specifications relate to oil filtering equipment of low to medium
capacity. Oil filtering equipment should be capable of giving an effluent
containing not more than 15 ppm of oil irrespective of the oil content (from
0% to 100%) of the feed supplied to it.

1.2.2 The oil/water mixture, with which the system has in practice to deal,
depends on- .1 the position of the oil/water interface, with respect to the
suction point, in the space being pumped; .2 the type of pump used; .3 the
type and degree of closure of any control valve in the circuit; and .4 the
general size and configuration of the system. It is, therefore, desirable that
the test rig be so constructed as to include not only the equipment, but also
the pump and the most important of the valves, pipes, etc. (for an example see
Figures 1a and 1b). The pipework should be designed for a maximum liquid
velocity of 3 m/s.

1.2.3 The tests should be carried out with a supply rate equal to the full
throughput for which the equipment is designed.

1.2.4 Tests should be performed using 2 grades of oil. The tests described in
1.2.10 and 1.2.11 should be carried out using either- .1 a residual fuel oil
(test oil A1) of a relative density of not less than 0.94 at 15℃ and of a
viscosity of not less than 17 centistokes at 100℃ (220 centistokes at
37.8℃), and a light distillate fuel oil (test oil B1) having a relative
density of not less than 0.83 at 15℃; or .2 for ships which use residual
fuel oil of higher density and viscosity than that referred to above, the test
should be carried out with a residual fuel oil (test oil C1) of relative
density not less than 0.98 at 15℃ and a viscosity of not less than 25
centistokes at 100℃ (440 centistokes at 37.8℃), and a light distillate
fuel oil (test oil B1) having a relative density of not less than 0.83 at
15℃. If the equipment is fitted with heating facilities to allow the
separated oil retained in it to be discharged when the automatic discharge
valve is activated, the Certificate of Type Approval should be endorsed under
the heading "Limiting Conditions Imposed" with the following statement- "The
equipment is fitted with heating facilities.".

1.2.5 If the filtering equipment includes an integrated feed pump, this
equipment should be tested with that pump supplying the required quantity of
oil and water to the equipment at its rated capacity. If the equipment is to
be fed by the ship's bilge pumps, then the unit will be tested by supplying
the required quantity of oil and water mixture to the inlet of a centrifugal
pump operating at not less than 1000 rpm. This pump should have a delivery
capacity of not less than 1.5 times the rated capacity of the equipment at the
delivery pressure required for the test. The variation in oil/water ratio will
be obtained by valves on the oil and water suction pipes adjacent to the pump
suction, and the flow rate of oil and water or the oil content of the supply
to the equipment should be monitored. If a centrifugal pump is used, the
excess pump capacity should be dissipated by either a bypass to the suction
side, or by a throttle valve or standard orifice plate on the discharge side.
In all cases, to ensure uniform conditions, the piping arrangements
immediately prior to the equipment should be such that the influent to the
equipment should have a Reynolds Number of not less than 10000 as calculated
in fresh water, a liquid velocity of not less than 1 m/s and the length of the
supply pipe from the point of oil injection to the equipment should have a
length not less than 20 times its diameter. A mixture inlet sampling point and
a thermometer pocket should be provided near the equipment inlet and an outlet
sampling point and observation window should be provided on the discharge
pipe. Figures 1a and 1b give diagrammatic representations of 2 possible test
rigs, though it should be noted that the water and oil from the equipment need
not be led back to the supply tanks. Where the water and oil are re-circulated
during the test, additional sampling points should be fitted in the water and
oil lines to the mixture pump in order to check the quality of the water and
oil being supplied to the pump.

Figure 1

Diagrammatic arrangements of test facilities

Typical test rigs:

Figure 1a

Figure 1b

In order to approach isokinetic sampling, i.c. where the sample enters the
sampling pipe at stream velocity, the sampling arrangements should be as shown
in Figure 2 and, if a cock is fitted, free flow should be effected for at
least 1 minute before any sample is taken. The sampling points should be in
pipes running vertically.

Figure 2

Diagram of sampling arrangements

A Distance A, not greater than 400 mm. B Distance B, sufficient to insert
sampling bottle. C Dimension C, straight length should not be less than 60 mm.
D Dimension D, pipe thickness should not be greater than 2 mm. E Detail E,
chisel-edged chamfer (30o).

1.2.6 The following tests should be carried out- .1 for residual fuel oils of
relative density of not less than 0.94 at 15℃, with water having a relative
density of not more than 1.015 at 15℃ ; .2 for residual fuel oils of
relative density of 0.98 and above at 15℃, with water having a relative
density of not more than 1.015 at 15℃.

1.2.7 In the case of equipment depending essentially on gravity, the feed to
the system of the test water and oil water mixture should be maintained at a
temperature not greater than 40℃, and heating and cooling coils should be
provided where necessary. In other forms of separation where the dependence of
separation efficiency on temperature is not established, tests should be
carried out over a range of influent temperatures representing the normal
shipboard operating range of 10℃ to 40℃ or should be taken at a
temperature in this range where the separation efficiency is known to be
worst.

1.2.8 In those cases where, for the equipment, it is necessary to heat water
up to a given temperature and to supply heat to maintain that temperature, the
tests should be carried out at the given temperature.

1.2.9 To ensure that the equipment commences the test with the oil section
full of oil and with the supply line impregnated with oil, the equipment
should, after filling with water and while in the operating condition, be fed
with pure oil for not less than 5 minutes.

1.2.10 The equipment should be fed with a mixture composed of between 5000 and
10000 ppm of oil in water until steady conditions have been established.
Steady conditions are assumed to be the conditions established after pumping
through the equipment a quantity of oil/water mixture not less than twice the
volume of the equipment. The test should then proceed for 30 minutes. Samples
should be taken at the water outlet at 10 minutes and 20 minutes from the
start of this period. At the end of this test, an air cock should be opened on
the suction side of the pump and, if necessary, the oil and water valves
should be slowly closed together, and a sample taken at the water discharge as
the flow ceases

(this point can be checked from the observation window).

1.2.11 A test identical to that described in 1.2.10, including the opening of
the air cock, should be carried out with a mixture composed of approximately
25%** oil and 75%** water.

1.2.12 The equipment should be fed with 100%** oil for at least 5 minutes
during which time the observation window should be checked for any oil
discharge. Sufficient oil should be fed into the equipment to operate the
automatic oil discharge valve. After the operation of the oil discharge valve,
the test should be continued for 5 minutes using a 100%** oil supply in order
to check the sufficiency of the oil discharge system.

1.2.13 The equipment should be fed with water for 15 minutes. Samples of the
separated water effluent should be taken at the beginning of the test and
after the first 10 minutes.

1.2.14 A test lasting a minimum of 3 hours should be carried out to check that
the equipment will operate continuously and automatically. This trial should
use a cycle varying progressively from water to oily mixture with
approximately 25%** oil content and back to water every 15 minutes, and should
test adequately any automatic device which is fitted. The whole test sequence
should be performed as a continuous programme. At the end of the test, while
the equipment is being fed with 25%** oil, a water effluent sample should be
taken for analysis.

1.2.15 Sampling should be carried out as shown in Figure 2 so that the sample
taken will suitably represent the fluid issuing from the water outlet of the
equipment.

1.2.16 One-litre narrow necked glass flasks utilizing caps with Teflon seals
or equivalent should be used to collect the samples. Samples should be
preserved with the addition of 5 ml of hydrochloric acid (see paragraph 4.3.1
of Part 4 of this Annex), unless the sample is to be extracted on the same day
of collection, and be sealed and labelled in the presence of a representative
of the Director and arrangements should be made for analysis as soon as
possible and in any case within 7 days provided the samples are being kept
between 2℃ and 6℃ at laboratories approved by the Director.

1.2.17 The oil content of the samples should be determined in accordance with
Part 4 of the Annex.

1.2.18 When accurate and reliable oil content meters are fitted at inlet and
outlet of the equipment, one sample at inlet and outlet taken during each test
will be considered sufficient if they verify, to within + 10%, the meter
readings noted at the same instant.

1.2.19 In the presentation of the results, the following data should be
reported, using the International Metric System of Units- .1 properties of the
oil- -relative density at 15℃ -viscosity (centistokes at 100℃/37.8℃)
-flashpoint -ash -water content (total); .2 properties of the water- -relative
density at 15℃ with details of any solid matter present; .3 temperature at
the inlet to the equipment; .4 the method used in analysis of all samples
taken and the results thereof together with meter readings where appropriate;
.5 a diagram of the test rig; and .6 a diagram of the sampling arrangements.

1.2.20 The recommendations of the manufacturer of the filtering  equipment
concerning the choice and application of cleansing agents used for cleaning
purposes in machinery spaces should be recorded in the appendix to the
certificate of type approval. If the manufacturer declares that the user is
free in the choice and application of cleansing agents because this does not
affect the performance of the equipment, then this is to be recorded also. The
manufacturer should include this information in the instruction manual for the
filtering equipment.

PART 2

TEST AND PERFORMANCE SPECIFICATIONS FOR TYPE APPROVAL OF OIL CONTENT METERS
FOR BILGE ALARMS

2.1 General

2.1.1 These Test and Performance Specifications relate to oil content meters
for bilge alarms. In addition, the electrical and electronic section of these
systems should be tested in accordance with the Specifications for
Environmental Testing contained in Part 3 of this Annex.

2.1.2 The meter being tested should comply with all the relevant requirements
of the technical specifications contained in section 4.2 of these
Specifications.

2.2 Test specifications

2.2.1 For a meter designed for a bilge alarm, the accuracy should be within +
5 ppm. The accuracy of bilge alarms should remain within the above limits
despite the presence of contaminants other than oil, and the power supply
varying by 10% from the design value, i.e. in respect of electricity,
compressed air, etc.

2.2.2 The sampling arrangements should be such that a representative
homogeneous sample is obtained under all conditions of operation and under all
operational proportions of oil content. The sample should be obtained from the
full flow through the meter, but when this is impracticable the sampling
arrangements shown in Figure 2 in Part 1 should be used. Special care should
be given to this stage of the process and the validity of the resultant
findings.

2.2.3 During the various tests the response time of the meter should be
checked and it should also be noted whether alarms operate adequately when a
pre-stated threshold is exceeded.

2.2.4 A diagrammatic arrangement of a test facility for evaluating the
performance of oil content meters is given in Figure 3. The accuracy of the
oil content meter will be determined by comparing its readings against a known
flow of oil injected into a known flow of water. The grab samples taken will
be analysed in a laboratory by the methods specified in Part 4 of this Annex.
The results of the laboratory analysis will be used for correction and to
indicate sampling and test equipment variability. The water flow rate will be
adjusted so that the entire oil-water flow passes through the oil content
meter, except the intermittent grab sample stream. Special care should be
given to keep, continuously, a constant oil content in the water that flows
into the meter. The oil and contaminant metering pumps should be adjusted to
deliver a nearly continuous quantity of oil. If oil injection becomes
intermittent at low concentrations, the oil may be premixed with water to
provide continuous flow if absolutely necessary. The oil injection point
should be immediately up-stream of the oil content meter inlet to minimize
time lags.

Figure 3

Diagrammatic arrangements of test facilities

2.2.5 The oil content meter will be calibrated and zeroed as per the
manufacturer's instructions. It will then be tested with light distillate fuel
oil of a relative density of not less than 0.83 at 15℃ at the following
concentrations in ppm: 0, 15, and at the full scale of the meter. Each
concentration test will last for 15 minutes. Following each concentration
test, the meter will be run on oil-free water for 15 minutes and the reading
noted. If it proves necessary to re-zero or re-calibrate the meter during this
test, this fact will be noted.

2.2.6 The oil content meter for the bilge alarms should undergo contaminant
tests as follows- the oil content meter for the bilge alarms should be run on
a 10 ppm light distillate fuel oil sample, and each of the 3 contaminants
listed below will be added to the water tank in the concentrations given. Any
shift in the meter reading should be noted and recorded on the Certificate.

Contaminants -Fresh water (if seawater is used for the test programme). -Very
salt water-6% common salt with tap water. -Non-soluble suspended solids-about
10 ppm air cleaner test dust to the following specifications-

Size in micrometres Percentage of
total weight
0 -   5
5 - 10 10 - 20 20 - 40 40 - 80 39±2
18±3
16±3
18±3
9±3

2.2.7 The meter should be run on a 15 ppm light distillate fuel oil sample.
The water pressure or flow rate of the mixture should be adjusted from
one-half normal to normal and twice normal. Any effect of these changes on the
meter reading should be noted and recorded on the Certificate. This test may
require modification for meters with flow or pressure regulators or meters
designed to discharge into an ambient pressure sump.

2.2.8 The meter should be run on a 15 ppm light distillate fuel oil sample.
The water and oil injection pumps should be shut off. The meter will be left
turned on with no other changes made. After 8 hours, the water and oil
injection pump should be turned on and set to provide a mixture of 15 ppm. The
meter readings before and after each test and any damage to the meter should
be noted and recorded on the Certificate. This test determines also the proper
functioning of the low flow shut-off and alarm.

2.2.9 If the meter requires any utilities besides electricity, it should be
tested with these utilities at 110% and 90% of the design figures.

2.2.10 The meter should be calibrated and zeroed. A 15 ppm light distillate
fuel oil sample should be run through the meter for 8 hours and any
calibration drift noted. Following this, the meter should be run on oil-free
water and any zero drift noted and recorded on the Certificate.

2.2.11 The response time is to be taken for the meter to give an alarm at 15
ppm oil concentration after the supply to the meter is changed from clean
water to oily water, having more than 15 ppm oil. The colour of the water
supplied to the meter is not to affect the operation of the instrument. The
meter is to be tested for colour using 2.5 ppm black ink. The meter is to show
no deviation when tested for colour using 2.5 ppm black ink.

2.2.12 A specification of the instrument concerned and a diagrammatic
presentation of the test arrangements should be provided and the following
data should be reported, using the International Metric System of Units- .1
types and properties of oils used in the tests; .2 details of contaminants
used, in the form, for example, of a supplier's certificate or laboratory test
protocol; and .3 results of tests and analysis of grab samples.

2.2.13 The recommendations of the manufacturer of the oil content meter
concerning the choice and application of cleansing agents used for cleaning
purposes in machinery spaces should be recorded in the appendix to the
certificate of type approval. If the manufacturer declares that the user is
free in the choice and application of cleansing agents because this will/does
not affect the performance of the equipment, then this is to be recorded also.
The manufacturer should include this information in the instruction manual of
the oil content meter.

PART 3

SPECIFICATIONS FOR ENVIRONMENTAL TESTING FOR TYPE APPROVAL OF POLLUTION
PREVENTION EQUIPMENT

3.1 General

3.1.1 The specifications for environmental testing for type approval relate to
the electrical and electronic sections of- .1 oil filtering equipment; and .2
bilge alarms. The equipment tested should comply with all the relevant
requirements contained in section 5 of these Guidelines and Specifications.

3.2 Test specifications

3.2.1 Testing requirements

3.2.1.1 The electrical and electronic sections of the pollution control
equipment in the standard production configuration should be subjected to the
programme of environmental tests set out in this Specification at a laboratory
approved for the purpose by the Director or by the competent authority of the
manufacturer's home country. A copy of the environmental test document, in a
format similar to that specified in paragraph 2 of Part 5 of this Annex,
should be submitted to the Director by the manufacturer, together with the
application for type approval.

3.2.2 Test specification details

3.2.2.1 Equipment should operate satisfactorily on completion of each of the
following environmental tests- .1 Vibration tests .1.1 A search should be made
for resonance over the following range of frequency and amplitude of
acceleration- .1.1.1 2 to 13.2 Hz with an amplitude of + 1 mm; and .1.1.2 13.2
to 80 Hz with an acceleration of + 0.7 g. This search should be made in each
of the 3 planes at a rate sufficiently low to permit detection of resonance;
.1.2 the equipment should be vibrated in the planes at each major resonant
frequency for a period of 2 hours; .1.3 if there is no resonant frequency, the
equipment should be vibrated in each of the planes at 30 Hz with an
acceleration of + 0.7 g for a period of 2 hours; .1.4 after completion of the
tests specified in .1.2 or .1.3 of this paragraph a search should again be
made for resonance and there should be no significant change in the vibration
pattern. .2 Temperature tests .2.1 equipment that may be installed in an
enclosed space that is environmentally controlled, including an engine room,
should be subjected, for a period of not less than 2 hours, to- .2.1.1 a low
temperature test at 0℃; and .2.1.2 a high temperature test at 55℃. At the
end of each of the tests referred to, the equipment should be switched on and
it should function normally under the test conditions. .3 Humidity tests .3.1
equipment should be left switched off for a period of 2 hours at a temperature
of 55℃ in an atmosphere with a relative humidity of 90%. At the end of this
period the equipment should be switched on and should operate satisfactorily
for 1 hour. .4 Inclination test .4.1 equipment should operate satisfactorily
at angles of inclination up to 22.5o in any plane from the normal operating
position. .5 Reliability of electrical and electronic equipment .5.1 the
electrical and electronic components of the equipment should be of a quality
guaranteed by the manufacturer and suitable for their intended purpose.

PART 4

METHOD FOR DETERMINATION OF OIL CONTENT

4.1 Scope and application

4.1.1 The method includes the measurement of most light oil fractions,
although some loss of volatile components will occur during the extractions.

4.1.2 The method has a nominal working range from 2 to 80 mg/l. The lower
level of detection can be improved to 0.1 mg/l by using longer path-length
cells. The upper limit of the method can be extended at least to 1000 mg/l by
preparing dilutions of the sample extract.

4.2 Summary of method

The sample is acidified to a low pH and extracted with 2 volumes of carbon
tetrachloride. The oil content is determined by comparison of the infra-red
absorbances of the sample extract against known concentrations of the
appropriate reference oil. Other suitable non-infra-red active solvents may be
used if preferred.

4.3 Sample and storage

4.3.1 A representative sample of 1 litre volume is collected in a narrow-neck
glass bottle with a pressure-sealing cap. Unless the sample will be extracted
on the day of collection, it is preserved with the additional of 5 ml
hydrochloric acid (HCl) (4.5.1).

4.3.2 Because losses of oily matter will occur on sampling equipment, the
collection of a composite sample is impractical. Individual portions collected
at prescribed time intervals must be analysed separately to obtain the average
concentration over an extended period.

4.4 Apparatus

4.4.1 Separatory funnel, 1000 ml volume, with Teflon stopcock.

4.4.2 Infra-red spectrophotometer.

4.4.3 Cells, 5 mm path-length, sodium chloride or infra-red-grade quartz with
a minimum of 80% transmittance at 2930 cm-1 The 5 mm path-length is
recommended as being convenient for monitoring levels normally encountered.
Longer path-lengths may be used.

4.4.4 Filter paper, medium grade, 12.5 cm.

4.5 Reagents

4.5.1 Hydrochloric acid, HCI 1:1. Mix equal amounts of concentrated HCI and
distilled water.

4.5.2 Sodium chloride, NaCI reagent grade.

4.5.3 Carbon tetrachloride, CCI 4 reagent grade.

4.5.4 Oil reference-Oil collected from the source at the same time the sample
was collected.

4.5.5 Stock reference standard (3 mg/ml)-accurately weigh about 0.30 g of
reference oil (4.5.4) into a tared 100 ml volumetric flask and dilute to
volume with carbon tetrachloride. Using the reference oil at room ambient
temperature, record the relative density and temperature of the reference oil.
A weight-to-volume conversion to volume- to-volume must take into account the
differing densities of the 2 liquids used in preparing the calibration plot
(4.8.2).

4.5.6 Calibration standards-prepare a series of dilutions by pipetting volumes
of stock reference standards into 100 ml volumetric flasks and diluting to
volume with carbon tetrachloride. A convenient series of volumes is 5, 10, 15,
20 and 25 ml of stock solution. Calculate the exact concentrations of the
dilution in millilitres times 10 to the minus 3 per 100 ml of solvent (ml x 10
-3/100 ml) from the information above (4.5.5).

4.6 Extraction

4.6.1 If the sample was not acidified at time of collection, add 5 ml
hydrochloric acid (4.5.1) to the sample bottle. After mixing the sample, check
the pH by touching pH-sensitive paper to the cap to ensure that the pH is 2 or
lower. Add more acid if necessary.

4.6.2 Pour the sample into a separatory funnel and add 5 g of sodium chloride.

4.6.3 Add 50 ml carbon tetrachloride to the sample bottle. Cap tightly and
thoroughly shake the bottle to rinse the inside and cap. Transfer the solvent
into the separatory funnel and extract by shaking vigorously for 2 minutes.
Allow the layers to separate.

4.6.4 Drain the solvent layer through a funnel containing solvent-moistened
filter paper into a 100 ml volumetric flask.

4.6.5 Repeat steps 4.6.3 and 4.6.4 with an additional 50 ml portion of fresh
solvent; combine all solvent in the volumetric flask.

4.6.6 Rinse the top of the separatory funnel, filter paper and funnel with
small portions of carbon tetrachloride and collect the rinsings in the
volumetric flask. Adjust the extract volume up to 100 ml and stopper the
flask. Mix well.

4.6.7 Drain the water layer into a 1000 ml graduated cylinder and estimate the
sample volume to the nearest 5 ml.

4.7 Infra-red spectroscopy

4.7.1 Prepare the infra-red spectrophotometer according to manufacturer's
instructions.

4.7.2 Rinse a cell with 2 volumes of solution to be measured, then completely
fill the cell with solution. Place a matched cell containing carbon
tetrachloride in the reference beam.

4.7.3 Scan samples and standards from 3000 cm -1 to 2700 cm -1.

NOTE1: Single beam and non-scanning spectrophotometers can be used for this
test. Follow the manufacturer's instructions and measure the absorbance
directly at or near 2930 cm -1.

4.7.4 Construct a straight baseline under the hydrocarbon band as illustrated
in Figure 4. If the scan is recorded on absorbance paper, read the absorbance
of the peak maximum at 2930 cm-1 and subtract the absorbance of the baseline
at that point. If the scan is recorded on transmittance paper, the net
absorbance is-

%T (baseline)
log10 %T (peak maximum)

Figure 4

Spectrum illustrating baseline construction

4.7.5 Prepare a calibration plot of net absorbance vs mg/100 ml oil using the
response of the standards.

NOTE2: The oil concentration may be plotted as per cent of stock standard.
When this procedure is used, the concentration of the stock standard must be
used in the calculations (4.8.2).

4.7.6 If the net absorbance of a sample exceeds 0.8 or the linear range of the
instrument as determined by the calibration plot, prepare a dilution of the
sample by pipetting an appropriate volume of the extract into a volumetric
flask and diluting to volume. If the absorbance is less than 0.1, more
accurate results can be obtained by using a longer path- length cell.

4.8 Calculations

4.8.1 Use the calibration plot to calculate the mg of oil in each 100 ml of
sample extract or dilution.

4.8.2 Calculate the oil content in the sample using the formula-

R×D×1000
mg/l oil = V

where- R = mg of oil in 100 ml solution (determined from calibration plot) D =
extract dilution factor, if used (4.7.6) V = volume of sample, in millilitres
(4.6.7)

4.8.3 Report results to 2 significant figures for levels below 100 mg/l.

NOTE3: For quality control, a reagent blank should be carried through each
step of the procedure.

4.8.4 For purposes of comparison to meter records, the results should also be
presented in parts per million (volume/volume) with due allowance for the
relative density of the oil.

PART 5

DOCUMENTATION OF APPROVAL

5.1 Certificate of Type Approval for pollution prevention equipment

5.1.1 Satisfactory compliance with all the test requirements enumerated in
Parts 1 and 2 of this Annex should be shown in the Certificate of Type
Approval issued by the Director in the format specified in paragraph 5.1.2.
The Director may issue a Certificate of Type Approval based on separate
testing or on testing already carried out under supervision by another
Administration.

5.1.2 A Certificate of Type Approval should be in the format shown as Form "A"
or "B" to this Annex. The Certificate should identify the type and model of
the pollution prevention equipment to which it applies and identify equipment
assembly drawings, duly dated. Each drawing should bear the model
specification numbers or equivalent identification details. The Certificate
should include the full performance test protocol on which it is based. If a
Certificate of Type Approval is issued by the Director based on a Certificate
previously issued by another Administration, the Certificate should identify
the Administration which conducted the tests on the pollution prevention
equipment and a copy of the original test results should be attached to it.

5.2 Format of environmental test protocol

5.2.1 Satisfactory compliance with the environmental tests laid down in these
Guidelines and Specifications, where applicable, should be shown on the
environmental test protocol issued by the testing laboratory. The protocol
should include at least the following details- .1 identification of the
equipment by type and drawing number, duly dated; and .2 a statement of the
tests conducted on the equipment, including the results thereof.

5.2.2 The environmental test protocol should be endorsed by either the
Director or a competent authority of the manufacturer's home country to
confirm that the laboratory is approved to conduct such tests. The protocol
should also be signed and dated by the person in charge of the laboratory.

FORM A

[NAME OF ISSUING AUTHORITY]

CERTIFICATE OF TYPE APPROVAL FOR OIL FILTERING EQUIPMENT

(15 PPM EQUIPMENT)

This is to certify that the equipment listed below has been examined and
tested in accordance with the requirements of the Specifications contained in
Part 1 of the Annex to the Guidelines and Specifications contained in IMO
resolution MEPC 60(33). This Certificate is valid only for equipment referred
to below. Equipment supplied by
...........................................................................
.............................. under type and model designation and
incorporating: ..............................................................

* Equipment manufactured by
...........................................................................
................. to specification/assembly drawing No.
.................................. date ...................................

* Coalescer manufactured by
...........................................................................
................. to specification/assembly drawing No.
.................................. date ...................................

* Filters manufactured by
...........................................................................
....................... to specification/assembly drawing No.
.................................. date ...................................
Control equipment manufactured by
...........................................................................
..... to specification/assembly drawing No. ..................................
date ................................... Maximum throughput of system
........................................... m3/h
................................... The equipment has been tested with
residual oil having a relative density of not less than 0.94* or 0.98* at
15℃. If integral feed pump is not fitted state method proposed for ensuring
maximum throughput of system is not exceeded. (L.N. 259 of 1997) A copy of
this Certificate should be carried aboard a vessel fitted with this equipment
at all times. Limiting Conditions imposed Test data and results attached in
the Appendix

................................................................. (Signature
of duly authorized official issuing the Certificate)

Dated this .......... day of .......... 19 ............

* Delete as appropriate.

APPENDIX

TEST DATA AND RESULTS OF TESTS CONDUCTED ON

FILTERING EQUIPMENT IN ACCORDANCE WITH PART 1 OF THE ANNEX TO THE GUIDELINES
AND SPECIFICATIONS CONTAINED IN IMO RESOLUTION MEPC 60(33)

Equipment submitted by
...........................................................................
.............................. Test location
...........................................................................
.............................................. Method of sample analysis
...........................................................................
.......................... Samples analysed by
...........................................................................
..................................

Environmental testing of the electrical and electronic sections of the
equipment has been carried out in accordance with Part 3 of the Annex to the
Guidelines and Specifications contained in IMO resolution MEPC 60(33). The
equipment functioned satisfactorily on completion of each test specified in
the environmental test protocol. Manufacturers' recommendations and
information concerning the use of cleansing agents
...........................................................................
.................................................................

Test oil(A)/(C)* Relative density Viscosity

Flashpoint Ash content Water content at start of test
at 15℃
Centistokes at 100℃
Centistokes at 37.8℃
℃
%
% Test oil (B) Relative density Viscosity

Flashpoint Ash content Water content at start of test
at 15℃
Centistokes at 100℃
Centistokes at 37.8℃
℃
%
% Test water Relative density Solid matter present
at 15℃ Test temperatures Ambient Test oil (A)(C)* Test oil (B) Test water
℃
℃
℃
℃

Diagram of test rig attached Diagram of sampling arrangement attached

* Delete as appropriate.

TEST RESULTS (IN PPM) AND TEST PROCEDURES

Signed ................ Date ..............

(Official stamp or equivalent identification and the date of approval to be
placed on all pages of the test protocol.)

* Delete as appropriate.

FORM B

[NAME OF ISSUING AUTHORITY]

CERTIFICATE OF TYPE APPROVAL FOR OIL CONTENT METERS INTENDED FOR BILGE ALARMS

(15 PPM ALARM)

This is to certify that the oil content meter, comprising the equipment listed
below, has been examined and tested in accordance with the requirements of the
Specifications contained in Part 2 of the Annex to the Guidelines and
Specifications contained in IMO resolution MEPC 60(33). This Certificate is
valid only for an oil content meter referred to below.

Oil content meter supplied by
...........................................................................
...................... under type and model designation and incorporating:
................................................................ Oil content
meter analysing unit manufactured by
................................................................... to
specification/assembly drawing No. ....................... date
.................................................... Electronic section of oil
content meter manufactured by
.......................................................... to
specification/assembly drawing No. ....................... date
....................................................

*Sample feed pump manufactured by
...........................................................................
......... to specification/assembly drawing No. ....................... date
....................................................

*Sample conditioning unit manufactured by
........................................................................... .
to specification/assembly drawing No. ....................... date
....................................................

The oil content meter is acceptable for use with a 15 ppm bilge alarm in
accordance with regulation 16(5).

A copy of this Certificate should be carried aboard a vessel fitted with this
equipment at all times.

Test data and results attached as Appendix.

................................................................. (Signature
of duly authorized official issuing the Certificate)

Dated this .......... day of .......... 19 ............

* Delete as appropriate.

APPENDIX

TEST DATA AND RESULTS OF TESTS CONDUCTED ON AN OIL CONTENT METER IN ACCORDANCE
WITH PART 2 OF THE ANNEX TO THE GUIDELINES AND SPECIFICATIONS CONTAINED IN IMO
RESOLUTION MEPC 60(33)

Oil content meter submitted by
...........................................................................
...................

Test location
...........................................................................
............................................. Method of sample analysis
...........................................................................
......................... Samples analysed by
...........................................................................
.................................

Environmental testing of the electronic section of the oil content meter has
been carried out in accordance with Part 3 of the Annex to the Guidelines and
Specifications contained in IMO resolution MEPC 60(33). The equipment
functioned satisfactorily on completion of each test specified on the
environmental test protocol.

Manufacturers' recommendations and information concerning the use of cleansing
agents

...........................................................................
...............................................................

READINGS (ppm)

Indicated
Measured
Grab
Sample REMARKS

CALIBRATION
0
.................
.................
................. LIGHT DISTILLATE FUEL OIL 15 .................
................. .................
................. ................. .................
................. ................. ................. FULL SCALE
................. ................. .................

.................
.................
.................

TEST WATER TEMPERATURE
................... ℃

RE-ZERO
YES/NO*
RECALIBRATE
YES/NO* RESPONSE TIMES 15 ppm .......................... seconds

CONTAMINANTS TEST 1 Non-oil particulate matter Meter reading shift with ppm
non-oil particulate contaminants mixed with water and light distillate oil
added in oil concentrations of: -ppm ................. ppm -ppm
................. ppm -ppm ................. ppm

COLOUR TEST 2.5 ppm black ink test pass/fail*

SAMPLE PRESSURE OR FLOW TEST Meter reading shift at 50% of normal
.............. ppm Meter reading shift at 200% of normal .............. ppm
Deviations from this test should be stated if necessary Meter reading before
shut-off .............. ppm Meter reading after start-up (minimum dry period 8
hours) .............. ppm Damage to meter as follows-
...........................................................................
..........................................................
...........................................................................
..........................................................
...........................................................................
..........................................................
...........................................................................
..........................................................

UTILITIES SUPPLY VARIATION TEST 110% voltage effects
.................................................................. 90% voltage
effects ..................................................................
110% air pressure effects
.................................................................. 90% air
pressure effects
.................................................................. 110%
hydraulic pressure effects
.................................................................. 90%
hydraulic pressure effects
..................................................................

OTHER COMMENTS
...........................................................................
...............................................................
...........................................................................
...............................................................
...........................................................................
...............................................................
...........................................................................
...............................................................
...........................................................................
...............................................................

CALIBRATION AND ZERO TEST Calibration drift ................. ppm Zero drift
................. ppm

Signed ................ Date ..............

(Official stamp or equivalent identification and the date of approval to be
placed on all pages of the test protocol.)

* Delete as appropriate. (L.N. 641 of 1994; 32 of 2000 s. 48)
___________________________________________________________________________
______ Note: 1 Reference is made to Form A of this Annex for the Certificate
of Type Approval for oil filtering equipment.

** Percentage of volume. "ppm" (百萬分之)