EN ISO 20519:2017

Ships and marine technology - Specification for bunkering of liquefied natural gas fuelled vessels (ISO 20519:2017)

ISO 20519:2017 sets requirements for LNG bunkering transfer systems and equipment used to bunker LNG fuelled vessels, which are not covered by the IGC Code. This document includes the following five elements:
a)    hardware: liquid and vapour transfer systems;
b)    operational procedures;
c)    requirement for the LNG provider to provide an LNG bunker delivery note;
d)    training and qualifications of personnel involved;
e)    requirements for LNG facilities to meet applicable ISO standards and local codes.

Schiffe und Meerestechnik - Spezifikation für das Bunkern flüssigerdgasbetriebener Schiffe (ISO 20519:2017)

Diese Internationale Norm legt Anforderungen für LNG-Bunkerübergabesysteme und Ausrüstung zum Bunkern von LNG-betriebenen Seefahrzeugen fest, die nicht durch den IGC-Code abgedeckt sind. Der Anwendungsbereich dieser Norm umfasst die folgenden fünf Elemente:
a)   Hardware: Flüssigkeits- und Dampf-Übergabesysteme;
b)   Betriebsverfahren;
c)   Anforderung an den LNG-Bunkerlieferanten, einen LNG-Bunker-Lieferschein bereitzustellen;
d)   Schulung und Qualifikation der beteiligten Mitarbeiter;
e)   Anforderungen an LNG-Anlagen, die geltenden ISO-Normen und örtlichen Vorschriften zu erfüllen.

Navires et technologie maritime - Spécification pour le soutage des navires fonctionnant au gaz naturel liquéfié (ISO 20519:2017)

ISO 20519:2017 établit les exigences applicables aux équipements et systèmes de transfert de GNL utilisés pour le soutage de navires fonctionnant au GNL, qui ne sont pas couverts par le Code IGC. Le domaine d'application de ce document comprend les cinq éléments suivants:
a)    matériel: systèmes de transfert de liquide et de vapeur,
b)    procédures opérationnelles,
c)    exigence pour le fournisseur de GNL de fournir un bon de livraison de soute de GNL,
d)    formation et qualifications du personnel intervenant,
e)    exigence pour les installations de GNL de respecter les normes ISO et les codes locaux applicables.

Ladjarska in pristaniška tehnologija - Specifikacija za oskrbovanje plovil na utekočinjeni zemeljski plin (ISO 20519:2017)

Ta mednarodni standard postavlja zahteve za oskrbovanje pretakališč in opreme za utekočinjen zemeljski plin, ki se uporabljajo za oskrbovanje ladij na utekočinjeni zemeljski plin, ki niso zajete v kodeksu IGC. Področje uporabe tega standarda vključuje naslednjih pet elementov. 1) Strojno opremo: pretakališča za tekočine in paro, vključno s priključki, nepremičnimi cevovodi, cevmi, suhim odklopom, ERS ter sistemi za prekinitev v sili in sistemi za izklop v sili (stopnji ESD 1 in 2) 2) Delovne postopke: vključno s komunikacijo, zahtevano minimalno zaščitno opremo za osebje, časi zaprtja ventilov, vzdrževanjem/pregledom opreme ter zahtevo, da ponudnik ponudnika utekočinjenega zemeljskega plina ter upravljavec oskrbovanega plovila ravnata v skladu s podrobnim priročnikom za ravnanje z gorivom in postopki v sili, podanimi v razdelku 18.2.3 kodeksa IMO IGF 3) Zahtevo, da ponudnik utekočinjenega zemeljskega plina dokumentira kakovost goriva (temperaturo, gostoto) in metodologijo, ki jo uporablja za merjenje neto energetske količine pretočenega utekočinjenega zemeljskega plina 4) Izobraževanje in usposobljenost zadevnega osebja 5) Zahteve, ki jih mora oprema za utekočinjen zemeljski plin izpolnjevati za skladnost z ustreznimi standardi ISO in lokalnimi kodeksi

General Information

• Status: Withdrawn
• Publication Date: 21-Feb-2017
• Withdrawal Date: 13-Apr-2025
• ICS: 47.020.99 - Other standards related to shipbuilding and marine structures
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• Technical Committee: CEN/TC 282 - Installation and equipment for LNG
• Drafting Committee: CEN/TC 282 - Installation and equipment for LNG
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 18-May-2022
• Completion Date: 14-Apr-2025
• Directive: 2014/94/EU - Directive 2014/94/EU of The European Parliament and of The Council of 22 October 2014 on the deployment of alternative fuels infrastructure
• Mandate: M/533 - [C(2015)1330] Standardisation request addressed to CEN, CENELEC and ETSI in support of the implementation of the Directive 2014/94/EU on the deployment of alternative fuels infrastructure
• Ref Project: SIST EN ISO 20519:2017 - Ships and marine technology - Specification for bunkering of liquefied natural gas fuelled vessels (ISO 20519:2017)

Relations

• Replaced By: EN ISO 20519:2022 - Ships and marine technology - Specification for bunkering of liquefied natural gas fuelled vessels (ISO 20519:2021)
• Effective Date: 24-Mar-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2017
/DGMDUVNDLQSULVWDQLãNDWHKQRORJLMD6SHFLILNDFLMD]DRVNUERYDQMHSORYLOQD
XWHNRþLQMHQL]HPHOMVNLSOLQ,62
Ships and marine technology - Specification for bunkering of liquefied natural gas fuelled
vessels (ISO 20519:2017)
Schiff- und Meerestechnik - Spezifikation für das Bunkern flüssigerdgasbetriebener
Schiffe (ISO 20519:2017)
Navires et technologie maritime - Spécification pour le soutage des navires fonctionnant
au gaz naturel liquéfié (ISO 20519:2017)
Ta slovenski standard je istoveten z: EN ISO 20519:2017
ICS:
47.020.99 Drugi standardi v zvezi z Other standards related to
ladjedelništvom in shipbuilding and marine
konstrukcijami na morju structures
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20519
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2017
EUROPÄISCHE NORM
ICS 47.020.99; 75.200
English Version
Ships and marine technology - Specification for bunkering
of liquefied natural gas fuelled vessels (ISO 20519:2017)
Navires et technologie maritime - Spécification pour le Schiff- und Meerestechnik - Spezifikation für das
soutage des navires fonctionnant au gaz naturel Bunkern flüssigerdgasbetriebener Schiffe (ISO
liquéfié (ISO 20519:2017) 20519:2017)
This European Standard was approved by CEN on 5 February 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20519:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 20519:2017) has been prepared by Technical Committee ISO/TC 8 "Ships and
marine technology" in collaboration with Technical Committee CEN/TC 282 “Installation and
equipment for LNG” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2017, and conflicting national standards shall
be withdrawn at the latest by August 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 20519:2017 has been approved by CEN as EN ISO 20519:2017 without any modification.

INTERNATIONAL ISO
STANDARD 20519
First edition
2017-02
Ships and marine technology —
Specification for bunkering of
liquefied natural gas fuelled vessels
Navires et technologie maritime — Spécification pour le soutage des
navires fonctionnant au gaz naturel liquéfié
Reference number
ISO 20519:2017(E)
©
ISO 2017
ISO 20519:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 20519:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 5
5 Transfer system design requirements . 5
5.1 Vessel requirements . 5
5.2 Facility requirements . 6
5.3 Transfer equipment requirements . 6
5.4 Emergency shutdown and release systems . 6
5.5 Specific requirements . 8
5.5.1 System support . . 8
5.5.2 Hoses, corrugated metallic or composite . 8
5.5.3 Transfer arms . 8
5.5.4 Bunkering connections . . 8
5.5.5 Dry-disconnect/connect coupling . 9
5.5.6 Insulation flange . . 9
5.5.7 Fall arrest. 9
5.6 Identification of transfer equipment .10
5.7 Transfer system design analysis .10
5.8 Maintenance .11
5.9 Maintenance manual .11
6 LNG bunkering processes and procedures .11
6.1 Mooring .11
6.2 Communication in preparation for a transfer .11
6.3 Risk assessments.13
6.3.1 General.13
6.3.2 Risk assessment . .13
6.3.3 Conditions considered .13
6.3.4 Assessment methodology .13
6.3.5 Acceptable bunkering parameters .14
6.4 Vessel safety assessments .14
6.5 Transfer procedures .14
7 Management system/quality assurance .16
7.1 Management systems .16
7.2 Management systems for transfer equipment manufacturers .16
8 Personnel training .16
8.1 Vessel personnel training requirements .16
8.2 Additional training requirements for personnel involved in bunkering operations
on vessels .16
8.2.1 General.16
8.2.2 Personnel providing LNG from port or mobile facilities training .16
8.3 Documentation of training .16
9 Records and documentation .17
Annex A (normative) LNG bunker checklists .18
Annex B (normative) Risk assessment and controlled zones .30
Annex C (informative) Illustrations .36
Bibliography .39
ISO 20519:2017(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 on 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 the following URL: www . i so .org/ iso/ foreword .html.
The committee responsible for this document is ISO/TC 8, Ships and marine technology.
iv © ISO 2017 – All rights reserved

ISO 20519:2017(E)
Introduction
This document has been produced to meet an industry need identified by the International Maritime
Organization (IMO). This document has been designed to support the IMO International Code of Safety
for Ships using Gases or other Low-flashpoint Fuels (IGF Code).
Due to numerous economic and environmental factors, the use of liquefied natural gas (LNG) as a
vessel’s fuel has increased. While LNG fuelled ships and vessels have been in service for over 10 years,
most of these vessels have operated within small defined areas using LNG bunkering operations
designed for that particular vessel service. The increase in LNG fuelled vessels corresponds with an
increase in the number of the regions that these vessels will service. Therefore, there is a need to
standardize LNG bunkering operations internationally to a reasonable degree so that vessel operators
will have the tools to select vessel fuel providers that meet set safety and fuel quality standards and LNG
bunkering operations will be conducted safely. This document can be used for both vessels involved in
international and domestic service regardless of size.
This document does not replace existing laws or regulations. It is flexible so that it can be applied in
many situations and under various regulatory regimes as long as the requirements of this document
are met. If, however, local regulations preclude its use and do not provide the safety specified in this
document, compliance with this document should not be claimed.
INTERNATIONAL STANDARD ISO 20519:2017(E)
Ships and marine technology — Specification for
bunkering of liquefied natural gas fuelled vessels
1 Scope
This document sets requirements for LNG bunkering transfer systems and equipment used to bunker
LNG fuelled vessels, which are not covered by the IGC Code. This document includes the following five
elements:
a) hardware: liquid and vapour transfer systems;
b) operational procedures;
c) requirement for the LNG provider to provide an LNG bunker delivery note;
d) training and qualifications of personnel involved;
e) requirements for LNG facilities to meet applicable ISO standards and local codes.
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 16904, Petroleum and natural gas industries — Design and testing of LNG marine transfer arms for
conventional onshore terminals
ASME B16.5, Pipe flanges and flanged fittings: NPS 1/2 through NPS 24 metric/inch standard
BS 4089, Specification for metallic hose assemblies for liquid petroleum gases and liquefied natural gases
EN 1474-2, Installation and equipment for liquefied natural gas — Design and testing of marine transfer
systems — Design and testing of transfer hose
EN 1474-3, Installation and equipment for liquefied natural gas — Design and testing of marine transfer
systems — Offshore transfer systems
EN 12434, Cryogenic vessels — Cryogenic flexible hoses
IEC 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres
IMO International Code of Safety for Ships using Gases or other Low-flashpoint Fuels (IGF Code)
IMO International Code of the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk
(IGC Code)
Oil Companies International Marine Forum. Design and Construction Specification for Marine Loading
Arms. Third edition, 1999. London, England: Oil Companies International Marine Forum
Society of International Gas Tanker and Terminal Operators (SIGTTO). ESD Arrangements &
Linked Ship/Shore Systems for Liquefied Gas Carriers [online]. First edition, 2009. Scotland, UK: Witherby
Seamanship International Ltd
ISO 20519:2017(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
bunkering
operation of transferring LNG fuel to a vessel (3.22)
Note 1 to entry: For the purposes of this document, it refers to the delivery of LNG only. This document does not
address the transfer of CNG, propane or fuels other than LNG that may be covered by the IGF Code (see 3.2).
3.2
bunkering terminal
fixed operation on or near shore that is not regulated as a vessel (3.22) that can be used to provide LNG
bunkers to a receiving vessel
3.3
classed
classification
process in which the design and condition of a vessel (3.22) is evaluated to determine its compliance
with rules and standards developed by the Classification Society (3.5) issuing the classification
3.4
controlled zones
areas extending from the bunkering manifolds on the LNG receiving vessel and the LNG supply source
during LNG bunkering operations that have restrictions in place
Note 1 to entry: These restrictions include limitation on personnel access, sources of ignition and unauthorized
activities. The controlled zones are subdivided into hazardous zones, safety zones and the monitoring and
security areas as defined in Annex B.
3.5
Classification Society
non-governmental organization that establishes and maintains technical standards for the construction
and operation of ships and offshore structures
Note 1 to entry: They also validate that construction is according to these standards and carry out regular
surveys in service to verify compliance with the standards.
3.6
dry-disconnect
method that reduces LNG (3.10) or natural gas releases into the atmosphere under normal operation to
a negligible amount consistent with safety, either by equipment design or procedural practice
3.7
emergency release (break-away) coupling
ERC
coupling installed on LNG (3.10) and vapour lines, as a component of ERS, to ensure the quick physical
disconnection of the transfer system from the unit to which it is connected, designed to prevent damage
to loading/unloading equipment in the event that the transfer system’s operational envelope and/or
parameters are exceeded beyond a predetermined point
2 © ISO 2017 – All rights reserved

ISO 20519:2017(E)
3.8
emergency release system
ERS
system that provides a safe shut down, transfer system isolation and quick release of hoses or transfer
arms (3.19) between the facility or vessel (3.22) providing the LNG (3.10), and the vessel receiving the
LNG, preventing product release at disconnection time
Note 1 to entry: The ERS consists of an emergency release coupling (ERC) and interlocked isolating valves which
automatically close on both sides, thereby containing the LNG or vapour in the lines (dry disconnect), and, if
applicable, associated control system.
3.9
emergency shutdown system
ESD
system that safely and effectively stops the transfer of LNG (3.10) and vapour between the facility or
vessel (3.22) providing the LNG and the vessel receiving the LNG or vice versa
Note 1 to entry: The operation of this system can be referred to as an “ESD I”. Vessel ESD systems should not be
confused with other emergency shutdown systems within the terminal or on board vessels.
Note 2 to entry: An informative illustration of an ESD I and ESD II is provided in Figure C.2.
3.10
liquefied natural gas
LNG
natural gas that has been cooled and condensed into liquid form
Note 1 to entry: It is characterized as a cryogenic liquid having a temperature typically around −161 °C under
normal atmospheric pressure.
3.11
lower flammable limit
LFL
concentration of flammable gas or vapour in air below which there is insufficient amount of substance
to support and propagate combustion
3.12
management system
set of procedures an organization needs to follow in order to meet its objectives
3.13
member state authority
legal authority within a member state that has jurisdiction over maritime or port activities within
that state
3.14
mobile facility
mobile facilities are trucks, rail car or other mobile device (including portable tanks) used to transfer
LNG (3.10) to a vessel (3.22)
3.15
monitoring and security area
area around the bunkering facility and vessel (3.22) where vessel traffic and other activities are
monitored to mitigate harmful effects
3.16
recognized organization
competent organization with delegated authority on behalf of an Administration to assist in the uniform
and effective implementation of IMO Codes and Conventions
Note 1 to entry: Adapted from IMO A.739(18).
ISO 20519:2017(E)
3.17
LNG transfer system
consists of all equipment contained between the bunkering manifold flange on the facility or vessel
(3.22) providing LNG fuel and the bunkering manifold flange on the receiving LNG fuelled vessel
including but not limited to; vessel to vessel transfer arms, LNG transfer arms (articulated rigid piping)
or hoses, emergency release system (ERS) (3.8), insulation flanges; quick connect/disconnect couplings
(QC/DC), and in addition the ESD ship/shore or ship/ship link used to connect the supplying and
receiving ESD systems
Note 1 to entry: An illustration of a typical LNG transfer system is provided in Figure C.1.
3.18
technical standards
standards that prescribe requirements for one or more of the following: operations, equipment
design/fabrications or testing methodology
Note 1 to entry: Auditors cannot issue a certification or approval to a company that claims compliance with a
Technical Standard unless that standard is incorporated into a recognized management system as a management
objective.
3.19
transfer arm
articulated metal transfer system used for transferring LNG (3.10) to the vessel (3.22) being bunkered
Note 1 to entry: It can be referred to as a “loading arm” or “unloading arm”.
3.20
safety zone
area around the bunkering station where only dedicated and essential personnel and activities are
allowed during bunkering (3.1)
3.21
security zone
area established by the national or local authorities around a bunkering facility or area through which
vessel (3.22) and personnel movement is subject to regulatory restrictions
3.22
vessel
includes ships, barges (self-propelled or no propulsion) or boats of any size in domestic or
international service
Note 1 to entry: A bunkering vessel is a vessel used to transport LNG to a vessel using LNG as a fuel.
Note 2 to entry: A receiving vessel is a vessel that uses LNG as a fuel and does not transport LNG as a cargo.
4 © ISO 2017 – All rights reserved

ISO 20519:2017(E)
4 Abbreviated terms
Term Description Explanation
IGC International Maritime The IGC Code applies to ships involved in the carriage of bulk
Code Organization’s International Code for liquefied gases and prescribes the design and construction
the Construction and standards of ships involved in such carriage and the
Equipment of Ships Carrying equipment they should carry.
Liquefied Gases in Bulk
IGF International Maritime The IGF Code applies to ships fuelled by gases or other
Code Organization’s International Code of low-flashpoint fuels. The Code contains mandatory provisions
Safety for Ships using Gases or other for the arrangement, installation, control and monitoring of
Low-flashpoint Fuels, 2017 machinery, equipment and systems using low-flashpoint fuels.
IACS International Association of An organization that establishes, reviews, promotes and
Classification Societies develops minimum technical requirements in relation to
the design, construction, maintenance and survey of ships
and other marine related facilities; and assists international
regulatory bodies and standards organizations to develop,
implement and interpret statutory regulations and industry
standards in ship design, construction and maintenance, with
a view to improving safety at sea and the prevention of marine
pollution.
IMO International Maritime Organization A specialized agency of the United Nations whose purpose is
“to provide machinery for cooperation among governments
in the field of governmental regulation and practices relating
to technical matters of all kinds affecting shipping engaged
in international trade; to encourage and facilitate the general
adoption of the highest practicable standards in matters
concerning efficiency of navigation, and prevention and
control of marine pollution from ships.”
ISM International Safety Management An IMO code that provides an international standard for the
Code safe management and operation of ships and for pollution
prevention.
STCW International Convention on This convention promotes the safety of life and property at sea
Standards of Training, Certification and the protection of the marine environment by establishing
and Watchkeeping for Seafarers in common agreement international standards of training,
certification and watchkeeping for seafarer.
SGMF Society for Gas as a Marine Fuel A non-governmental organization established to promote
safety and industry best practice in the use of gas as a
marine fuel.
5 Transfer system design requirements
5.1 Vessel requirements
5.1.1 In order to be compliant with this document, vessels involved shall meet the following
requirements (this applies to vessels of all sizes, in domestic or international service):
5.1.2 Bunkering vessels shall conform with this document and be approved by its Flag State, Recognized
Organization or Classification Society that complies with the applicable uniform interpretations and
requirements posted by IACS, indicating that it meets, at a minimum, the applicable requirements of the
IGC Code, this document and applicable Flag State requirements.
5.1.3 Receiving vessels shall conform with this document and be approved by its Flag State, Recognized
Organization or Classification Society that complies with the applicable uniform interpretations and
requirements posted by IACS, indicating that it meets, at a minimum, the applicable requirements of the
IGF Code, this document and applicable Flag State requirements.
ISO 20519:2017(E)
5.2 Facility requirements
5.2.1 Mobile facilities (e.g. tank trucks, rail cars and portable tanks) including their tanks, piping,
hoses, pumps and valves shall be fabricated and conform to meet ISO or other standards recognized by
national standards bodies that are ISO members for handling cryogenic liquids.
5.2.2 The bunkering terminal shall conform to local codes. If local codes do not address LNG bunkering
terminals, the terminal operator shall obtain a document issued by a competent organization or
individual such as a qualified engineer confirming the terminal conforms to the applicable sections of
standards published by ISO and ISO member organizations as well as guidance published by SGMF.
5.3 Transfer equipment requirements
5.3.1 All equipment used in the transfer system shall meet the requirements defined for that specific
piece of equipment as prescribed in 5.3 to 5.5. The use of liquid nitrogen as a substitute for LNG during
testing of the equipment by the equipment manufacturers is acceptable.
5.3.2 All the components of the transfer system through which LNG or natural gas flow shall be rated for
the maximum transfer system design pressure but shall have a pressure rating of no less than 1 034 MPa.
All flanges shall be at least Class 150 in accordance with ASME B16.5 and of the weld-neck type.
5.3.3 All the components of the transfer system shall be fabricated to meet or exceed the applicable
sections of the standards indicated in Table 1, the IGC/IGF Codes, in addition to other requirements listed
in this document.
Table 1 — Standards containing requirements applicable to transfer system components
Component Function Standard(s)
Hoses Transfer of LNG and natural gas EN 1474-2 or EN 12434 or
BS 4089
Swivel joints Product line articulation ISO 16904
Flanges Product line connections ASME B16.5
Bearings Articulation of support structure ISO 16904
ERS Emergency disconnect ISO 16904
Breakaway coupling Emergency disconnect ISO 16904
Transfer arms LNG bunkering loading solution ISO 16904
Other transfer system LNG bunkering loading solution ISO 16904
5.3.4 Flow rate of LNG through the transfer system shall not exceed 12 m/s, however, higher speeds
can be locally acceptable in reduced passages, for example in the ERS, provided cavitation and vibration
is acceptable.
5.4 Emergency shutdown and release systems
5.4.1 The LNG transfer system shall be fitted with an emergency release system (ERS) and connected
to an emergency shutdown system (ESD). The delivery facility and receiving vessel ESD systems shall be
interconnected with a ship/shore or ship/ship ESD link to ensure the coordinated operation of both the
delivery and receiving ESD systems and ERS.
5.4.1.1 The ERS shall be designed to protect the transfer system and the connections by disconnecting
the transfer system, primarily should the vessel drift out of their operating envelope. The ERS shall
consist of an emergency release coupling (ERC) including interlocked isolating valves to minimize loss of
LNG or NG when the ERC is activated.
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ISO 20519:2017(E)
5.4.1.2 The ESD shall be designed to be activated by operator-initiated signals as well as sensor input
and when activated, initiate shutting down the LNG transfer pumps and closing of the ESD valves. At a
minimum, they will include sensors that will provide input in the event of
— fire or gas detection,
— power failure,
— LNG tanks being overfilled,
— abnormal pressure in the transfer system,
— vessel drifting out of position,
— low temperature in the drip tray, and
— loading arm being overstressed.
NOTE An illustration of the ESD initiators is provided in Figures C.3 and C.4.
5.4.2 The ESD link shall be designed to conform to the requirements specified in Appendix D or H of
ESD Arrangements & Linked Ship/Shore Systems for Liquefied Gas Carriers.
5.4.3 The emergency release system (ERS) shall be designed to operate as a dry break system and
conform to the following requirements.
— Designed to separate before the hose or loading arm is overstressed. This calculated force or
bending moment is to be recorded. The system shall be capable of actuation both automatically on
vessel drift or manually from a remote location.
— Designed to operate with ESD I and ESD II stage systems.
— Designed to maintain integrity without leakage following ESD II while LNG is being transferred at
maximum flow (for example, ESD II, “may” and “should” were replaced with “shall” throughout the
document when they were part of a requirement without ESD I).
— The consequences of an emergency breakaway in terms of resultant surge pressures are to be
determined and demonstrated to be within the capability of the supply system to not exceed the
design pressure.
— Designed so that ice that forms during or after transfer will not impede the function of the coupling
or its emergency release collar when used in accordance with the manufacturer’s directions.
5.4.4 The design for the ERS shall take into account drifting scenarios commensurate with the
surrounding environment and location. A study shall be undertaken to simulate and determine the
acceleration and velocity of drift likely to occur due to a possible failure of the mooring system, taking
into consideration the range of vessels that are likely to use the terminal. The study shall take into
account, as a minimum, the following:
— wind speeds and direction;
— current and bank effect;
— tidal range;
— waves and swell height, period and direction;
— surge from passing vessels;
— inadvertent operation of vessel’s propulsion or of mooring system;
— ice flows.
ISO 20519:2017(E)
5.4.5 Low volume transfer systems in which the LNG transfer rate will not exceed 150 m /h (for
example tank trucks) may, subject to performance of a transfer system design analysis, eliminate the
requirements for:
— manual activation of the ERS (5.4.3, list item 1);
— ERS to be designed to activate the emergency shutdown (5.4.3, list item 2);
— ESD link system complying with Appendix H of ESD Arrangements & Linked Ship/Shore Systems for
Liquefied Gas Carriers. Note that a system complying with Appendix D of ESD Arrangements & Linked
Ship/Shore Systems for Liquefied Gas Carriers is still required.
5.4.6 Prevention of over pressurization: Design of transfer system shall consider over pressurization
due to surge pressure in the event the ERS or the ESD is activated. If procedures are developed, they shall
be documented in the bunkering operations procedures manual required in 6.5.
5.5 Specific requirements
5.5.1 System support
All transfer equipment shall be adequately supported during transfer operations to perform safely
under the operating parameters also listed in 5.6. Determination of the support required can be
obtained from two sources.
a) Documentation from the equipment manufacturers that lists the additional support (if any) needed
for the system to operate under the parameters listed in 5.6.
b) Documentation of an analysis conducted by a competent organization or individual such as a
qualified engineer, of the forces involved under the operating parameters listed in 5.6 that identifies
what additional support (if any) is needed for the system to operate without exceeding the load
(tension, compressive, axial) or bending limits established by the equipment manufacturers.
5.5.2 Hoses, corrugated metallic or composite
Hoses used as part of the transfer system shall be designed for LNG use and meet one of the hose
standards listed in Table 1. The maximum load (stress), calculated by the manufacturer, that the hose
can be placed under prior to its failure (parting) shall be documented.
5.5.2.1 Hose support loading arm and hose supports (saddles)
If used, shall conform to ISO 16904 or EN 1474-3 and be designed to safely support the loads (static
and dynamic) imposed by the LNG transfer operations during hose connection, transfer operations and
when the hose is disconnected under emergency conditions. They shall provide the necessary support
so that the hose bending radius is not below recommended minimum bending radius specified by the
hose manufacturer.
The minimum and maximum hose lengths and diameters the hose support loading arm and/or hose
saddles can support shall be documented in the LNG bunkering procedures manual.
5.5.3 Transfer arms
Transfer arms shall at a minimum conform to the requirements of ISO 16904 or EN 1474-3 or the Design
and Construction Specification for Marine Loading Arms.
5.5.4 Bunkering connections
Bunkering connections shall all be arranged in order to allow dry-disconnect operation and shall be
— dry-disconnect/connect coupling compliant with 5.5.5;
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ISO 20519:2017(E)
— flange bolting assembly (on provider side only), unless an assessment of operating procedures
concludes that dry-disconnection can be achieved by procedural means;
— manual connect coupler (without check valves) on standardized flange;
— hydraulic coupler on standardized flange (without check valves);
— except in the case of an emergency release, drained and inerted before being disconnected.
5.5.5 Dry-disconnect/connect coupling
The coupling consists of a nozzle and a receptacle. The nozzle allows quick connection and disconnection
of the fuel supply hose to the receptacle mounted on the LNG hose or transfer arm of the transfer
system. Connectors used shall be designed to operate as quick connect/disconnect couplings and shall
conform to the following requirements.
— Both the nozzle and the receptacle shall have an internal valve which are operated by each other.
The volume between the two valves shall be as small as possible to prevent the loss of LNG during
the disconnection process.
— Connection and disconnection shall be made with positive indication that connection is fully made.
An interlock shall be included to ensure coupling cannot be disconnected with the valve in the open
position.
— The maximum force to (dis)connect the nozzle from the receptacle shall be 350 N applied to the
locking device (release mechanism).
— The coupling shall be supplied designed to prevent dust, moisture and other foreign debris from
entering the receptacle when not in use or it shall be provided with protective caps and venting
holes (if applicable) to provide such protection.
— End connections shall be flanges in accordance with ASME B16.5, Class 150.
— They shall be clearly and indelibly marked in English “Liquid Natural Gas use only” or “Natural Gas
use only” as applicable. Additional markings in other languages are permissible. Liquid Natural Gas
and Natural Gas may be abbreviated as LNG or NG.
— Designed so that ice that forms during or after transfer will not impede the function of the coupling
or its dry disconnect valves when used in accordance with the manufacturer’s directions. This is to
include internal ice formation.
5.5.6 Insulation flange
A single insulation (isolation) flange (built to meet applicable requirements of the International Oil
Tanker and Terminal (ISGOTT) Safety Guide, 5th Edition) shall be provided (as recommended by the
SGMF) in each transfer arm or hose of the transfer system between the receiving vessel manifold and
the bunker pipeline. The installation shall not permit shorting out of this insulation; when bunkering
from a mobile facility, the vehicle shall be grounded to an earthing point at the quay to prevent static
build-up. The earthing point shall conform to local electrical codes.
Vessel-shore bonding cables/straps should not be used. If national or local regulations require a
bonding cable/strap to be used, the circuit continuity shall be made via a “certified-safe” switch (such
as one housed inside an inherently-safe enclosure) and the connection on board the vessel shall be in a
location remote from the hazardous area. The switch shall not be closed until the bonding cable/strap
has been connected and it shall be opened prior to disconnection of the bonding strap.
5.5.7 Fall arrest
If the distance that a transf
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