ISO 6919:2024
(Main)Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Dynamic measurement of liquefied natural gas (LNG) as marine fuel — Truck-to-ship (TTS) bunkering
Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Dynamic measurement of liquefied natural gas (LNG) as marine fuel — Truck-to-ship (TTS) bunkering
This document defines procedures and requirements for measuring liquefied natural gas (LNG) from truck-to-ship (TTS) using the combination of Coriolis mass flowmeter (MFM) and gas chromatography (GC). It also gives guidance and requirements for portable packaging of the combination system in mobile form which minimizes facility storage space and streamlines the use of development systems. Output from the system in calorie units is applicable to commercial transactions between suppliers and users of liquefied natural gas (LNG) as marine fuel. This document also consists of general requirements, metrological requirements, system flawless requirements, requirements and test methods, and procedures for measurement methods.
Mesurage des combustibles gazeux liquéfiés réfrigérés à base d'hydrocarbures ou à base non pétrolière — Mesurage dynamique du gaz naturel liquéfié (GNL) en tant que combustible marin — Soutage de camion à navire
General Information
Buy Standard
Standards Content (Sample)
International
Standard
ISO 6919
First edition
Measurement of refrigerated
2024-07
hydrocarbon and non-petroleum
based liquefied gaseous fuels —
Dynamic measurement of liquefied
natural gas (LNG) as marine fuel —
Truck-to-ship (TTS) bunkering
Mesurage des combustibles gazeux liquéfiés réfrigérés à
base d'hydrocarbures ou à base non pétrolière — Mesurage
dynamique du gaz naturel liquéfié (GNL) en tant que combustible
marin — Soutage de camion à navire
Reference number
© ISO 2024
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
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements and safety precautions . 4
5 Measurement systems and equipment . 4
5.1 General .4
5.2 Portable packaging measurement system .4
5.3 Metrological requirements for measurement .7
5.3.1 Coriolis flow meter installation requirements .7
5.3.2 Gas chromatography apparatus requirement .7
5.4 Measurement system verification . .7
5.4.1 Coriolis flow meter system verification .7
5.4.2 Gas chromatography system verification .7
5.5 Equipment maintenance and testing .7
6 Measurement procedures . 7
6.1 Coriolis mass flowmeter procedures .7
6.1.1 General .7
6.1.2 Quantity measurement procedures .8
6.1.3 Quantity measurement documentation .9
6.1.4 MFM system failure and quantity dispute .9
6.2 Gas chromatography procedures . .9
6.2.1 General .9
6.2.2 Quality measurement procedures .10
6.2.3 Quality measurement documentation .10
6.2.4 Calibration . . .10
6.3 LNG energy calculation .10
6.4 Measurement report.10
Annex A (informative) Energy value calculation .12
Annex B (informative) LNG bunker delivery note . 14
Annex C (informative) Bunker metering ticket .16
Annex D (informative) LNG Bunker checklist TTS . 17
Annex E (informative) Mass flow metering system seals checklist .24
Annex F (informative) Meter reading record form (delivery) .25
Bibliography .26
iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 28, Petroleum and related products, fuels and
lubricants from natural or synthetic sources, Subcommittee SC 5, Measurement of refrigerated hydrocarbon
and non-petroleum based liquefied gaseous fuels.
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
International Standard ISO 6919:2024(en)
Measurement of refrigerated hydrocarbon and non-
petroleum based liquefied gaseous fuels — Dynamic
measurement of liquefied natural gas (LNG) as marine fuel —
Truck-to-ship (TTS) bunkering
1 Scope
This document defines procedures and requirements for measuring liquefied natural gas (LNG) from truck-
to-ship (TTS) using the combination of Coriolis mass flowmeter (MFM) and gas chromatography (GC). It
also gives guidance and requirements for portable packaging of the combination system in mobile form
which minimizes facility storage space and streamlines the use of development systems. Output from the
system in calorie units is applicable to commercial transactions between suppliers and users of liquefied
natural gas (LNG) as marine fuel.
This document also consists of general requirements, metrological requirements, system flawless
requirements, requirements and test methods, and procedures for measurement methods.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 6974-1:2012, Natural gas — Determination of composition and associated uncertainty by gas
chromatography — Part 1: General guidelines and calculation of composition
ISO 22192:2021, Bunkering of marine fuel using the Coriolis mass flow meter (MFM) system
ISO 10790:2015, Measurement of fluid flow in closed conduits — Guidance to the selection, installation and use
of Coriolis flowmeters (mass flow, density and volume flow measurements)
ISO 6976:2016, Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from
composition
ISO 21903, Refrigerated hydrocarbon fluids — Dynamic measurement — Requirements and guidelines for
the calibration and installation of flowmeters used for liquefied natural gas (LNG) and other refrigerated
hydrocarbon fluids
ISO 6578:2017, Refrigerated hydrocarbon liquids — Static measurement — Calculation procedure
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
bunker
fuel supplied to a vessel for its propulsion and/or operation
Note 1 to entry: The fuel in this document is Class F, as specified in ISO 8217.
3.2
bunker delivery note
BDN
proprietary document of the bunker supplier providing details of the quality and quantity of the bunker(s)
delivered by the truck to the receiving ship
3.3
bunker metering ticket
ticket printed at the end of bunkering operation
3.4
bunkering operation
transfer operation between the truck and receiving ship
3.5
bunker supplier
company which contractually agrees with the buyer to deliver the product
3.6
bunker surveyor
person who inspects, measures, samples, investigates and reports as required on the bunkering operations (3.4)
3.7
LNG representative
individual who represents the bunker supplier (3.5) and is responsible for bunkering operations (3.4) and
documentations
3.8
calibration
operation that, under specified conditions, in a first step, establishes a relation between the quantity values
with measurement uncertainties provided by measurement standards and corresponding indications with
associated measurement uncertainties and, in a second step, uses this information to establish a relation for
obtaining a measurement result from an indication
[SOURCE: ISO/IEC Guide 99:2007, 2.39, modified — notes to entry have been deleted.]
3.9
chief engineer
high-level technical position for receiving bunkers and documentation of the bunkering operation (3.4) on
the vessel
3.10
container
portable tank unit
3.11
expanded uncertainty
quantity defining an interval about
...
FINAL DRAFT
International
Standard
ISO/FDIS 6919
ISO/TC 28/SC 5
Measurement of refrigerated
Secretariat: JISC
hydrocarbon and non-petroleum
Voting begins on:
based liquefied gaseous fuels —
2024-03-12
Dynamic measurement of liquefied
Voting terminates on:
natural gas (LNG) as marine fuel —
2024-05-07
Truck-to-ship (TTS) bunkering
Mesurage des combustibles gazeux liquéfiés réfrigérés à
base d'hydrocarbures ou à base non pétrolière — Mesurage
dynamique du gaz naturel liquéfié (GNL) en tant que combustible
marin — Soutage de camion à navire
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
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
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.
Reference number
ISO/FDIS 6919:2024(en) © ISO 2024
FINAL DRAFT
ISO/FDIS 6919:2024(en)
International
Standard
ISO/FDIS 6919
ISO/TC 28/SC 5
Measurement of refrigerated
Secretariat: JISC
hydrocarbon and non-petroleum
Voting begins on:
based liquefied gaseous fuels —
Dynamic measurement of liquefied
Voting terminates on:
natural gas (LNG) as marine fuel —
Truck-to-ship (TTS) bunkering
Mesurage des combustibles gazeux liquéfiés réfrigérés à
base d'hydrocarbures ou à base non pétrolière — Mesurage
dynamique du gaz naturel liquéfié (GNL) en tant que combustible
marin — Soutage de camion à navire
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.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ISO/FDIS 6919:2024(en) © ISO 2024
ii
ISO/FDIS 6919:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements and safety precautions . 4
5 Measurement systems and equipment . 4
5.1 General .4
5.2 Portable packaging measurement system .4
5.3 Metrological requirements for measurement .7
5.3.1 Coriolis flow meter installation requirements .7
5.3.2 Gas chromatography apparatus requirement .7
5.4 Measurement system verification . .7
5.4.1 Coriolis flow meter system verification .7
5.4.2 Gas chromatography system verification .7
5.5 Equipment maintenance and testing .7
6 Measurement procedures . 7
6.1 Coriolis mass flowmeter procedures .7
6.1.1 General .7
6.1.2 Quantity measurement procedures .8
6.1.3 Quantity measurement documentation .9
6.1.4 MFM system failure and quantity dispute .9
6.2 Gas chromatography procedures . .9
6.2.1 General .9
6.2.2 Quality measurement procedures .10
6.2.3 Quality measurement documentation .10
6.2.4 Calibration . . .10
6.3 LNG energy calculation .10
6.4 Measurement report.10
Annex A (informative) Energy value calculation .12
Annex B (informative) LNG bunker delivery note . 14
Annex C (informative) Bunker metering ticket .16
Annex D (informative) LNG Bunker checklist TTS . 17
Annex E (informative) Mass flow metering system seals checklist .24
Annex F (informative) Meter reading record form (delivery) .25
Bibliography .26
iii
ISO/FDIS 6919:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 28, Petroleum and related products, fuels and
lubricants from natural or synthetic sources, Subcommittee SC 5, Measurement of refrigerated hydrocarbon
and non-petroleum based liquefied gaseous fuels.
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
FINAL DRAFT International Standard ISO/FDIS 6919:2024(en)
Measurement of refrigerated hydrocarbon and non-
petroleum based liquefied gaseous fuels — Dynamic
measurement of liquefied natural gas (LNG) as marine fuel —
Truck-to-ship (TTS) bunkering
1 Scope
This document defines procedures and requirements for measuring liquefied natural gas (LNG) from truck-
to-ship (TTS) using the combination of Coriolis mass flowmeter (MFM) and gas chromatography (GC). It
also gives guidance and requirements for portable packaging of the combination system in mobile form
which minimizes facility storage space and streamlines the use of development systems. Output from the
system in calorie units is applicable to commercial transactions between suppliers and users of liquefied
natural gas (LNG) as marine fuel.
This document also consists of general requirements, metrological requirements, system flawless
requirements, requirements and test methods, and procedures for measurement methods.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 6974-1:2012, Natural gas — Determination of composition and associated uncertainty by gas
chromatography — Part 1: General guidelines and calculation of composition
ISO 22192:2021, Bunkering of marine fuel using the Coriolis mass flow meter (MFM) system
ISO 10790:2015, Measurement of fluid flow in closed conduits — Guidance to the selection, installation and use
of Coriolis flowmeters (mass flow, density and volume flow measurements)
ISO 6976:2016, Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from
composition
ISO 21903, Refrigerated hydrocarbon fluids — Dynamic measurement — Requirements and guidelines for
the calibration and installation of flowmeters used for liquefied natural gas (LNG) and other refrigerated
hydrocarbon fluids
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
ISO 6578:2017, Refrigerated hydrocarbon liquids — Static measurement — Calculation procedure
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://
...
ISO/FDIS 6919:20232024(E)
Style Definition: Heading 1: Indent: Left: 0 pt, First
line: 0 pt, Tab stops: Not at 21.6 pt
ISO TC 28/SC 5/WG 6
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at 18 pt
Date: 2023-07-072024-02-27
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Secretariat: JISC
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Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels -
Dynamic measurement of liquefied natural gas (LNG) as marine fuel – Truck-to-ship (TTS) Style Definition: Heading 6: Font: Bold
bunkering
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Not at 67.65 pt
Mesurage des combustibles gazeux liquéfiés réfrigérés à base d'hydrocarbures ou à base non pétrolière —
Style Definition: ANNEX: Indent: Left: 0 pt
Mesurage dynamique du gaz naturel liquéfié (GNL) en tant que combustible marin — Soutage de camion à
navire Style Definition: Unresolved Mention1
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ISO/FDIS 6919:20232024(E)
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no
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part of this publication may be reproduced or utilized otherwise in any form or by any means,
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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 Formatted: Indent: Left: 14.2 pt, Right: 14.2 pt
ISO’sISO's member body in the country of the requester.
ISO copyright officeCopyright Office
Formatted: Indent: Left: 14.2 pt, First line: 0 pt, Right:
14.2 pt
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Formatted: Indent: Left: 14.2 pt, First line: 0 pt, Right:
14.2 pt
Phone: + 41 22 749 01 11
Email: copyright@iso.org
Email: copyright@iso.org
Website: www.iso.orgwww.iso.org
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14.2 pt
Published in Switzerland.
Formatted: Indent: Left: 14.2 pt, Right: 14.2 pt
ii © ISO 20232024 – All rights reserved
ISO/FDIS 6919:20232024(E)
Contents
Foreword . 6
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements and safety precautions . 4
5 Measurement systems and equipment . 4
5.1 General . 4
5.2 Portable packaging measurement system . 5
Figure 1 — Portable packaging of the combination system . 8
5.3 Metrological requirements for measurement . 9
5.3.1 Coriolis flow meter installation requirements . 9
5.3.2 Gas chromatography apparatus requirements . 9
5.4 Measurement system verification . 9
5.4.1 Coriolis flow meter system verification . 9
5.4.2 Gas chromatography system verification . 9
5.5 Equipment maintenance and testing . 9
6 Measurement procedures . 9
6.1 Coriolis mass flowmeter procedures . 9
6.1.1 General . 9
6.1.2 Quantity measurement procedures . 10
6.1.3 Quantity measurement documentation . 11
6.1.4 MFM system failure and quantity dispute . 11
6.2 Gas chromatography procedures . 12
6.2.1 General . 12
6.2.2 Quality measurement procedures . 12
6.2.3 Quality measurement documentation . 12
6.2.4 Calibration . 12
6.3 LNG energy calculation . 12
6.4 Measurement report . 12
Annex A (informative) Energy value calculation . 14
Annex B (informative) LNG bunker delivery note . 17
Figure B.1 — Example of LNG bunker delivery note . 19
Annex C (informative) Bunker metering ticket . 20
Figure C.1 — Example of bunker metering ticket . 21
Annex D (informative) LNG Bunker checklist TTS . 22
Table D.1 — Representatives for LNG transfer modes . 22
Table D.2 — Part A: Planning stage checklist . 24
Table D.2 (continued) . 25
ISO/FDIS 6919:20232024(E)
Table D.3 — Part B: Pre-transfer Checklist . 26
Table D.3 (continued) . 27
Table D.3 (continued) . 27
Table D.4 — Agreed starting temperatures and pressures . 28
Table D.5 — Agreed bunker operations . 29
Table D.6 — Agreed maximums and minimums . 29
Table D.7 — Declaration. 30
Table D.8 — Record of repetitive checks . 30
Table D.9 — Post LNG transfer checklist . 31
Table D.10 — Declaration of post LNG transfer checklist . 31
Annex E (informative) Bunker requisition form (mass flow metering) . 33
Figure E.1 — Example of Bunker Requisition Form (Mass Flow Metering) . 34
Annex F (informative) Mass Flow Metering System Seals Checklist . 35
Figure F.1 — Example of mass flow metering system seals checklist . 36
Annex G (informative) Meter reading record form (delivery) . 37
Figure G.1 — Example of meter reading record form (delivery) . 38
Bibliography . 39
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements and safety precautions . 4
5 Measurement systems and equipment . 4
5.1 General . 4
5.2 Portable packaging measurement system . 5
Figure 1 — Portable packaging of the combination system . 8
5.3 Metrological requirements for measurement . 9
5.3.1 Coriolis flow meter installation requirements . 9
5.3.2 Gas chromatography apparatus requirement . 9
5.4 Measurement system verification . 9
5.4.1 Coriolis flow meter system verification . 9
5.4.2 Gas chromatography system verification . 9
5.5 Equipment maintenance and testing. 9
6 Measurement procedures . 9
6.1 Coriolis mass flowmeter procedures . 9
6.1.1 General . 9
6.1.2 Quantity measurement procedures . 10
6.1.3 Quantity measurement documentation . 11
6.1.4 MFM system failure and quantity dispute . 11
6.2 Gas chromatography procedures . 12
6.2.1 General . 12
6.2.2 Quality measurement procedures . 12
iv © ISO 20232024 – All rights reserved
ISO/FDIS 6919:20232024(E)
6.2.3 Quality measurement documentation . 12
6.2.4 Calibration . 12
6.3 LNG energy calculation . 12
6.4 Measurement report . 12
Annex A (informative) Energy value calculation . 14
Annex B (informative) LNG bunker delivery note . 17
Figure B.1 — Example of LNG bunker delivery note . 19
Annex C (informative) Bunker metering ticket .
...
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