Ships and marine technology -- Bunker fuel mass flow meters on receiving vessel -- Requirements

This document specifies requirements for Coriolis mass flow meter (MFM) systems installed on and used by vessels for the accurate measurement of bunker fuels received. It defines metrology and security requirements as well as testing requirements of the MFM system for the receiving vessel. This document complements ISO 8217, ISO 22192 and OIML R117. This document does not cover mass flow meters used for custody transfer, nor does it address overall bunker delivery procedural issues, such as delivery system integrity and transfer operations. It is not applicable to cryogenic fuels such as LNG. For bunker delivery using a Coriolis mass flow meter system in a custody transfer role, refer to ISO 22192.

Navires et technologie maritime -- Appareils de mesure du débit massique des soutes sur le navire de réception -- Exigences

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Published
Publication Date
19-Jul-2020
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
25-Jun-2020
Completion Date
24-Jun-2020
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INTERNATIONAL ISO
STANDARD 21562
First edition
2020-07
Ships and marine technology —
Bunker fuel mass flow meters on
receiving vessel — Requirements
Navires et technologie maritime — Appareils de mesure du débit
massique des soutes sur le navire de réception — Exigences
Reference number
ISO 21562:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 21562:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 21562:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols and abbreviated terms ........................................................................................................................................................... 2

5 Design and environment testing .......................................................................................................................................................... 2

5.1 Materials and equipment ............................................................................................................................................................... 2

5.2 Environmental tests ........................................................................................................................................................................... 2

5.3 Hydrostatic test ...................................................................................................................................................................................... 3

5.4 Temperature .............................................................................................................................................................................................. 3

5.5 Pressure rating ........................................................................................................................................................................................ 3

5.6 Non-metallic materials ..................................................................................................................................................................... 3

5.7 Marking ......................................................................................................................................................................................................... 3

6 Metrological requirements ........................................................................................................................................................................ 3

6.1 General ........................................................................................................................................................................................................... 3

6.2 MFM requirements .............................................................................................................................................................................. 4

6.3 MFM system requirements ........................................................................................................................................................... 4

7 Security requirements .................................................................................................................................................................................... 4

7.1 General ........................................................................................................................................................................................................... 4

7.2 Security features .................................................................................................................................................................................... 5

7.2.1 Equipment security ....................................................................................................................................................... 5

7.2.2 Software security ............................................................................................................................................................. 5

7.2.3 Measurement data recording ................................................................................................................................ 5

8 MFM selection and installation requirements ...................................................................................................................... 5

8.1 General ........................................................................................................................................................................................................... 5

8.2 MFM selection .......................................................................................................................................................................................... 5

8.3 MFM system installation and commissioning .............................................................................................................. 6

9 MFM system verification .............................................................................................................................................................................. 6

10 Metering procedures ........................................................................................................................................................................................ 6

10.1 General ........................................................................................................................................................................................................... 6

10.2 Documentation ....................................................................................................................................................................................... 7

10.3 Bunker fuel receipt .............................................................................................................................................................................. 7

10.3.1 Custody transfer pre-delivery conference ................................................................................................. 7

10.3.2 Preparation of MFM system for bunker receipt .................................................................................... 7

10.3.3 Start of bunker receipt ................................................................................................................................................ 7

10.3.4 End of receipt ...................................................................................................................................................................... 8

Annex A (informative) Example set-up of a laboratory calibration facility for a Coriolis

MFM — Gravimetric (weighing) method ..................................................................................................................................... 9

Annex B (informative) Schematic diagram of MFM system on receiving vessel ...................................................10

Annex C (informative) Information required — Checklist .........................................................................................................11

Bibliography .............................................................................................................................................................................................................................13

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 21562:2020(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 3, Piping and machinery.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 21562:2020(E)
Introduction

Accurate measurement of large quantities of bunker fuels received by ships around the world has

historically been difficult, with many ships relying on outdated methods of verification, such as before-

and-after manual measurement of fuel tank levels. The potential for inaccuracies is significant and can

result in disputes between the fuel supplier and the ship.

This document addresses the need for standardization of meters used to accurately measure the

quantity of fuel received. Traditionally, volumetric flow meters have raised accuracy concerns because

of the potential for air and other gases to affect the measurement of the fluid. Also, entrained air can

cause inaccurate shipboard tank readings during and immediately after bunkering.

Accurate measurement of bunker fuel receipt quantities using mass flow meters will result in greater

efficiencies in the ship bunkering process and reduce disputes.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 21562:2020(E)
Ships and marine technology — Bunker fuel mass flow
meters on receiving vessel — Requirements
1 Scope

This document specifies requirements for Coriolis mass flow meter (MFM) systems installed on and

used by vessels for the accurate measurement of bunker fuels received. It defines metrology and

security requirements as well as testing requirements of the MFM system for the receiving vessel. This

document complements ISO 8217, ISO 22192 and OIML R117.

This document does not cover mass flow meters used for custody transfer, nor does it address overall

bunker delivery procedural issues, such as delivery system integrity and transfer operations. It is not

applicable to cryogenic fuels such as LNG.

For bunker delivery using a Coriolis mass flow meter system in a custody transfer role, refer to

ISO 22192.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
bunker
bunker fuel
fuel (Class F) supplied to a vessel for its propulsion and/or operation
Note 1 to entry: Class F fuels are specified in ISO 8217.
3.2
mass flow meter
MFM

equipment designed to directly measure and indicate the mass of bunker fuel (3.1) received by a ship

3.3
maximum allowable working pressure
MAWP

highest stress to which a piping system component can be subjected, based on materials and design

calculations
3.4
maximum mass flow rate
max

maximum flow rate up to which the MFM system (3.5) has been qualified to operate in compliance with

the required accuracy
Note 1 to entry: The maximum value is normally determined by the application.
© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 21562:2020(E)
3.5
MFM system

bunker fuel (3.1) receiving system, comprising the mass flow meter (3.2) and its ancillary devices,

pipelines and seals between the vessel’s bunker manifold and the mass flow meter
3.6
minimum mass flow rate
min

minimum flow rate to which the metering system has been qualified to operate, in compliance with the

required accuracy

Note 1 to entry: The minimum value is normally determined by the flow metering system.

3.7
minimum measured quantity
MMQ

smallest quantity of liquid for which the measurement is metrologically acceptable for a given system

or element
4 Symbols and abbreviated terms
AC alternating current
DC direct current
DN nominal diameter
IEC International Electrotechnical Commission
LFC low flow cut-off
Q maximum flow rate
max
Q minimum flow rate
min
P pressure
MAWP maximum allowable working pressure
MFM mass flow meter
MMQ minimum measured quantity
OIML International Organization of Legal Metrology
5 Design and environment testing
5.1 Materials and equipment

MFM casings, as well as any pressure-retaining parts, shall be of metallic construction. Materials

rendered ineffective by heat shall not be used in the construction of the meter casing or any pressure-

retaining parts. All other parts shall be constructed of materials suitable for the service intended.

Fasteners in contact with interior fluid shall be of corrosion-resistant materials.

Threaded fittings shall not be used in pipe sizes greater than DN 50.
5.2 Environmental tests

Unless otherwise specified, environmental tests shall be conducted on a prototype of each meter model.

2 © ISO 2020 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 21562:2020(E)

MFM for marine applications should have documentation of completion of the following tests:

a) vibration,
b) temperature,
c) weather tightness.
The tests abo
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21562
ISO/TC 8/SC 3
Ships and marine technology —
Secretariat: ANSI
Bunker fuel mass flow meters on
Voting begins on:
2020­04­29 receiving vessel — Requirements
Voting terminates on:
2020­06­24
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 21562:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 21562:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 21562:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols and abbreviated terms ........................................................................................................................................................... 2

5 Design and environment testing .......................................................................................................................................................... 2

5.1 Materials and equipment ............................................................................................................................................................... 2

5.2 Environmental tests ........................................................................................................................................................................... 2

5.3 Hydrostatic test ...................................................................................................................................................................................... 3

5.4 Temperature .............................................................................................................................................................................................. 3

5.5 Pressure rating ........................................................................................................................................................................................ 3

5.6 Non­metallic materials ..................................................................................................................................................................... 3

5.7 Marking ......................................................................................................................................................................................................... 3

6 Metrological requirements ........................................................................................................................................................................ 3

6.1 General ........................................................................................................................................................................................................... 3

6.2 MFM requirements .............................................................................................................................................................................. 4

6.3 MFM system requirements ........................................................................................................................................................... 4

7 Security requirements .................................................................................................................................................................................... 4

7.1 General ........................................................................................................................................................................................................... 4

7.2 Security features .................................................................................................................................................................................... 5

7.2.1 Equipment security ....................................................................................................................................................... 5

7.2.2 Software security ............................................................................................................................................................. 5

7.2.3 Measurement data recording ................................................................................................................................ 5

8 MFM selection and installation requirements ...................................................................................................................... 5

8.1 General ........................................................................................................................................................................................................... 5

8.2 MFM selection .......................................................................................................................................................................................... 5

8.3 MFM system installation and commissioning .............................................................................................................. 6

9 MFM system verification .............................................................................................................................................................................. 6

10 Metering procedures ........................................................................................................................................................................................ 6

10.1 General ........................................................................................................................................................................................................... 6

10.2 Documentation ....................................................................................................................................................................................... 7

10.3 Bunker fuel receipt .............................................................................................................................................................................. 7

10.3.1 Custody transfer pre-delivery conference ................................................................................................. 7

10.3.2 Preparation of MFM system for bunker receipt .................................................................................... 7

10.3.3 Start of bunker receipt ................................................................................................................................................ 7

10.3.4 End of receipt ...................................................................................................................................................................... 8

Annex A (informative) Example set-up of a laboratory calibration facility for a Coriolis

MFM — Gravimetric (weighing) method ..................................................................................................................................... 9

Annex B (informative) Schematic diagram of MFM system on receiving vessel ...................................................10

Annex C (informative) Information required — Checklist .........................................................................................................11

Bibliography .............................................................................................................................................................................................................................13

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 21562:2020(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 non­governmental, 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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 3, Piping and machinery.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 21562:2020(E)
Introduction

Accurate measurement of large quantities of bunker fuels received by ships around the world has

historically been difficult, with many ships relying on outdated methods of verification, such as before-

and-after manual measurement of fuel tank levels. The potential for inaccuracies is significant and can

result in disputes between the fuel supplier and the ship.

This document addresses the need for standardization of meters used to accurately measure the

quantity of fuel received. Traditionally, volumetric flow meters have raised accuracy concerns because

of the potential for air and other gases to affect the measurement of the fluid. Also, entrained air can

cause inaccurate shipboard tank readings during and immediately after bunkering.

Accurate measurement of bunker fuel receipt quantities using mass flow meters will result in greater

efficiencies in the ship bunkering process and reduce disputes.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21562:2020(E)
Ships and marine technology — Bunker fuel mass flow
meters on receiving vessel — Requirements
1 Scope

This document specifies requirements for Coriolis mass flow meter (MFM) systems installed on and

used by vessels for the accurate measurement of bunker fuels received. It defines metrology and

security requirements as well as testing requirements of the MFM system for the receiving vessel. This

document complements ISO 8217, ISO 22192 and OIML R117.

This document does not cover mass flow meters used for custody transfer, nor does it address overall

bunker delivery procedural issues, such as delivery system integrity and transfer operations. It is not

applicable to cryogenic fuels such as LNG.

For bunker delivery using a Coriolis mass flow meter system in a custody transfer role, refer to

ISO 22192.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
bunker
bunker fuel
fuel (Class F) supplied to a vessel for its propulsion and/or operation
Note 1 to entry: Class F fuels are specified in ISO 8217.
3.2
mass flow meter
MFM

equipment designed to directly measure and indicate the mass of bunker fuel (3.1) received by a ship

3.3
maximum allowable working pressure
MAWP

highest stress to which a piping system component can be subjected, based on materials and design

calculations
3.4
maximum mass flow rate
max

maximum flow rate up to which the MFM system (3.5) has been qualified to operate in compliance with

the required accuracy
Note 1 to entry: The maximum value is normally determined by the application.
© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/FDIS 21562:2020(E)
3.5
MFM system

bunker fuel (3.1) receiving system, comprising the mass flow meter (3.2) and its ancillary devices,

pipelines and seals between the vessel’s bunker manifold and the mass flow meter
3.6
minimum mass flow rate
min

minimum flow rate to which the metering system has been qualified to operate, in compliance with the

required accuracy

Note 1 to entry: The minimum value is normally determined by the flow metering system.

3.7
minimum measured quantity
MMQ

smallest quantity of liquid for which the measurement is metrologically acceptable for a given system

or element
4 Symbols and abbreviated terms
AC alternating current
DC direct current
DN nominal diameter
IEC International Electrotechnical Commission
LFC low flow cut-off
Q maximum flow rate
max
Q minimum flow rate
min
P pressure
MAWP maximum allowable working pressure
MFM mass flow meter
MMQ minimum measured quantity
OIML International Organization of Legal Metrology
5 Design and environment testing
5.1 Materials and equipment

MFM casings, as well as any pressure-retaining parts, shall be of metallic construction. Materials

rendered ineffective by heat shall not be used in the construction of the meter casing or any pressure-

retaining parts. All other parts shall be constructed of materials suitable for the service intended.

Fasteners in contact with interior fluid shall be of corrosion-resistant materials.

Threaded fittings shall not be used in pipe sizes greater than DN 50.
5.2 Environmental tests

Unless otherwise specified, environmental tests shall be conducted on a prototype of each meter model.

2 © ISO 2020 – All rights reserved
...

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