ISO 21072-2:2009
(Main)Ships and marine technology — Marine environment protection: performance testing of oil skimmers — Part 2: Static water conditions
Ships and marine technology — Marine environment protection: performance testing of oil skimmers — Part 2: Static water conditions
ISO 21072-2:2009 specifies a methodology for establishing quantitative performance data for oil skimmers under static water conditions, so the end user can objectively judge, compare, and evaluate the design and performance of different skimmers. The methodology applies to testing in a basin and requires control of oil properties and oil slick characteristics. The method is applicable to all types of skimmers provided that the equipment dimensions are within the physical limitations of the test basin. The test procedure provides full-scale test results for the unit tested, under controlled conditions, and for one or more classes of oil. Attention is drawn to the care required when applying the test results to predict skimmer performance under field conditions. For dedicated/inbuilt systems the test procedures outlined in ISO 21072-2:2009 can only be used for the skimming device as such, not the entire skimming system.
Navires et technologie maritime — Protection de l'environnement marin: essais de performance des écumeurs du pétrole — Partie 2: Conditions en eau calme
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21072-2
First edition
2009-08-15
Ships and marine technology — Marine
environment protection: performance
testing of oil skimmers —
Part 2:
Static water conditions
Navires et technologie maritime — Protection de l'environnement marin:
essais de performance des écumeurs du pétrole —
Partie 2: Conditions en eau calme
Reference number
ISO 21072-2:2009(E)
©
ISO 2009
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ISO 21072-2:2009(E)
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ii © ISO 2009 – All rights reserved
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ISO 21072-2:2009(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Test facility requirements . 3
5 Clearance requirements. 3
6 Test parameters . 3
6.1 General. 3
6.2 Test oil properties. 4
6.3 Oil slick thickness. 4
6.4 Skimmer operating parameters. 4
6.5 Debris interference . 5
7 Test procedures . 5
7.1 Preparations prior to testing . 5
7.2 Actions during testing period. 5
7.3 Actions after testing . 6
8 Performance parameters . 7
8.1 Fluid recovery rate. 7
8.2 Emulsification factor . 7
8.3 Oil recovery rate. 7
8.4 Recovery efficiency . 8
9 Measurements and reporting . 8
9.1 General. 8
9.2 Oil properties. 8
9.3 Environmental parameters . 8
9.4 Skimmer operating parameters. 8
9.5 Other test parameters. 9
9.6 Recovery parameters . 9
9.7 Performance parameters (calculated parameters). 9
9.8 Equipment specification and test documentation . 9
10 Quality control. 9
10.1 Test duration and fluid volume . 9
10.2 Repetitions . 10
Bibliography . 11
© ISO 2009 – All rights reserved iii
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ISO 21072-2:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 21072-2 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 2, Marine environment protection.
ISO 21072 consists of the following parts, under the general title Ships and marine technology — Marine
environment protection: performance testing of oil skimmers:
⎯ Part 1: Moving water conditions
⎯ Part 2: Static water conditions
⎯ Part 3: High viscosity oil
iv © ISO 2009 – All rights reserved
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ISO 21072-2:2009(E)
Introduction
ISO 21072 (all parts) standardizes the performance testing of oil skimmers used in marine pollution control.
Some oil skimmers have previously been performance tested under non-standard conditions and procedures,
with declared performance parameters being of limited value to the end user, especially under field conditions.
ISO 21072 (all parts) provides for carrying out, and recording results of, full-scale tests for a skimmer under a
variety of test conditions, where there is limited or no access to specialist test facilities.
© ISO 2009 – All rights reserved v
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INTERNATIONAL STANDARD ISO 21072-2:2009(E)
Ships and marine technology — Marine environment
protection: performance testing of oil skimmers —
Part 2:
Static water conditions
1 Scope
This part of ISO 21072 specifies a methodology for establishing quantitative performance data for oil
skimmers under static water conditions, so the end user can objectively judge, compare, and evaluate the
design and performance of different skimmers. The methodology applies to testing in a basin and requires
control of oil properties and oil slick characteristics.
The method is applicable to all types of skimmers provided that the equipment dimensions are within the
physical limitations of the test basin. The test procedure provides full-scale test results for the unit tested,
under controlled conditions, and for one or more classes of oil. Attention is drawn to the care required when
applying the test results to predict skimmer performance under field conditions.
For dedicated/inbuilt systems, the test procedures outlined in this part of ISO 21072 can only be used for the
skimming device as such, not the entire skimming system.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 16165, Ships and marine technology — Marine environment protection — Terminology relating to oil spill
response
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16165 and the following apply.
3.1
data collection period
the period of time within the steady-state period (3.9) when recovered fluid is collected for establishing
performance data
[ISO 21072-1:2009]
3.2
debris
solid or semi-solid substance that could interfere with the operation of a spill control system
[ISO 21072-1:2009]
© ISO 2009 – All rights reserved 1
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ISO 21072-2:2009(E)
3.3
emulsification factor
EF
amount of water emulsified into the oil as a result of the skimming/pumping process, not including water
originally in the test fluid
NOTE It is expressed as a decimal fraction between 0 and 1.
[ISO 21072-1:2009]
3.4
fluid recovery rate
FRR
total volume of fluid recovered per time
NOTE It is expressed in cubic metres per hour.
[ISO 21072-1:2009]
3.5
recovery efficiency
RE
ratio of test fluid (oil or emulsion) recovered to the total volume of fluid recovered
NOTE It is expressed as a percentage.
[ISO 21072-1:2009]
3.6
oil recovery rate
ORR
volume of test fluid (oil or emulsion) recovered per unit time
NOTE It is expressed in cubic metres per hour.
[ISO 21072-1:2009]
3.7
oily phase
oil that is water-free or incorporates emulsified or encapsulated water that does not readily separate out
[ISO 21072-1:2009]
3.8
oil skimmer
skimmer
mechanical device used to remove oil from the water surface
[ISO 21072-1:2009]
3.9
steady-state period
period of time during which the test conditions and operating parameters are constant or within acceptable
variability ranges
[ISO 21072-1:2009]
2 © ISO 2009 – All rights reserved
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ISO 21072-2:2009(E)
4 Test facility requirements
This part of ISO 21072 is applicable to any test arrangement that allows for the control and monitoring of the
test conditions.
The test facility shall be designed and equipped to control the following parameters.
⎯ Oil properties. The facility shall be able to maintain the oil properties for the duration of the test. Oil
analytical equipment shall be available for measuring oil properties (see 9.2).
⎯ Air and water temperature. Testing may be carried out at any water temperature, provided that
requirements with respect to oil properties are met. The test temperature shall always be well above the
pour point of the oil, unless the purpose is to assess the collection of non-flowing/semi-solid oil. The
facility shall be able to maintain the water temperature in the test basin at a selected test temperature with
maximum variation of ± 2,0 °C.
⎯ Oil slick thickness. The test facility shall incorporate means of measuring oil slick thickness before and
after the test, with a proven accuracy of at least ± 20 %.
⎯ Measuring tanks. In order to provide for suffi
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