EN ISO 16904:2016

Petroleum and natural gas industries - Design and testing of LNG marine transfer arms for conventional onshore terminals (ISO 16904:2016)

ISO 16904:2016 specifies the design, minimum safety requirements and inspection and testing procedures for liquefied natural gas (LNG) marine transfer arms intended for use on conventional onshore LNG terminals, handling LNG carriers engaged in international trade. It can provide guidance for offshore and coastal operations. It also covers the minimum requirements for safe LNG transfer between ship and shore.
Although the requirements for power/control systems are covered, this International Standard does not include all the details for the design and fabrication of standard parts and fittings associated with transfer arms.
ISO 16904:2016 is supplementary to local or national standards and regulations and is additional to the requirements of ISO 28460.
ISO 16904:2016 needs not be applied to existing facilities.

Erdöl- und Erdgasindustrie - Auslegung und Prüfung von Schiffsverladearmen für Flüssigerdgas für konventionelle landseitige Terminals (ISO 16904:2016)

Diese Internationale Norm legt die Auslegung, die Mindestanforderungen an die Sicherheit und die Kontroll- und Prüfverfahren für Schiffsverladearme für Flüssigerdgas (LNG, en: Liquified Natural Gas) fest, die für den Gebrauch auf konventionellen landseitigen LNG-Terminals vorgesehen sind, an denen LNG Tanker für den internationalen Handel abgefertigt werden. Diese Norm enthält auch die Mindestanforderungen für den sicheren Umschlag von Flüssigerdgas zwischen Schiff und Land.
Obgleich die Anforderungen an Stromversorgungs- und Steuerungssysteme aufgeführt sind, gibt das Dokument nicht alle Einzelheiten für die Auslegung und Herstellung von genormten Teilen und Armaturen für Ladearme an.
Diese Internationale Norm gilt zusätzlich zu lokalen oder nationalen Normen und Verordnungen und ergänzt die Anforderungen der ISO 28460.
Diese Internationale Norm gilt nicht für bestehende Anlagen.

Industries du pétrole et du gaz naturel - Conception et essais des bras de transfert de GNL sur des terminaux terrestres conventionnels (ISO 16904:2016)

L'ISO 16904:2016 spécifie les règles de conception, les spécifications minimales de sécurité ainsi que les procédures de contrôle et d'essais relatifs aux bras de transfert de gaz naturel liquéfié (GNL) marins destinés à être utilisés sur des terminaux terrestres conventionnels, recevant des méthaniers engagés dans le commerce international. Elle peut fournir des lignes directrices pour des opérations côtières et au large. Elle fixe également les spécifications minimales permettant de garantir que le transfert de GNL entre le navire et le terminal s'effectue en toute sécurité.
Bien que les spécifications relatives aux systèmes d'alimentation/télécommande soient couvertes, l'ISO 16904:2016 ne fixe pas tous les détails relatifs à la conception et à la fabrication des pièces normalisées et des raccords des bras de transfert.
L'ISO 16904:2016 vient compléter les normes et règlements locaux ou nationaux, et s'ajoute aux spécifications de l'ISO 28460.
Il n'est pas nécessaire d'appliquer l'ISO 16904:2016 aux installations existantes.

Industrija nafte in zemeljskega plina - Načrtovanje in preskušanje rok za pretakanje utekočinjenega zemeljskega plina za konvencionalne terminale na kopnem (ISO 16904:2016)

Ta evropski standard določa načrtovanje, minimalne varnostne zahteve in preglede ter preskusne postopke za prenos utekočinjenega zemeljskega plina (LNG), namenjenega za rabo na konvencionalnih kopenskih LNG-terminalih 1. Ta standard zajema tudi minimalne zahteve za varen prenos utekočinjenega zemeljskega plina med ladjo in obalo. Kljub temu, da standard zajema tudi zahteve za daljinsko vodene napajalne sisteme, ne zajema vseh podrobnosti glede načrtovanja in izdelave standardnih delov in pritrdilnih elementov, povezanih z sistemom prenosa. Vsebina tega evropskega standarda dopolnjuje lokalne ali nacionalne standarde in predpise ter je dodatek k zahtevam iz standardov EN 1532 in EN 1473.

General Information

• Status: Published
• Publication Date: 15-Mar-2016
• Withdrawal Date: 29-Sep-2016
• ICS: 75.180.01 - Equipment for petroleum and natural gas industries in general
• 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: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 16-Mar-2016
• Completion Date: 16-Mar-2016
• Ref Project: SIST EN ISO 16904:2016 - Petroleum and natural gas industries - Design and testing of LNG marine transfer arms for conventional onshore terminals (ISO 16904:2016)

Relations

• Replaces: EN 1474-1:2008 - Installation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 1: Design and testing of transfer arms
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2016
1DGRPHãþD
SIST EN 1474-1:2009
,QGXVWULMDQDIWHLQ]HPHOMVNHJDSOLQD1DþUWRYDQMHLQSUHVNXãDQMHURN]D
SUHWDNDQMHXWHNRþLQMHQHJD]HPHOMVNHJDSOLQD]DNRQYHQFLRQDOQHWHUPLQDOHQD
NRSQHP,62
Petroleum and natural gas industries - Design and testing of LNG marine transfer arms
for conventional onshore terminals (ISO 16904:2016)
Erdöl- und Erdgasindustrie - Auslegung und Prüfung von Schiffsverladearmen für
Flüssigerdgas für konventionelle landseitige Terminals (ISO 16904:2016)
Industries du pétrole et du gaz naturel - Conception et essais des bras de transfert de
GNL sur des terminaux terrestres conventionnels (ISO 16904:2016)
Ta slovenski standard je istoveten z: EN ISO 16904:2016
ICS:
75.060 Zemeljski plin Natural gas
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16904
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 75.180.01 Supersedes EN 1474-1:2008
English Version
Petroleum and natural gas industries - Design and testing
of LNG marine transfer arms for conventional onshore
terminals (ISO 16904:2016)
Industries du pétrole et du gaz naturel - Conception et Erdöl- und Erdgasindustrie - Auslegung und Prüfung
essais des bras de transfert de GNL sur des terminaux von Schiffsverladearmen für Flüssigerdgas für
terrestres conventionnels (ISO 16904:2016) konventionelle landseitige Terminals (ISO
16904:2016)
This European Standard was approved by CEN on 24 July 2015.

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, 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
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16904:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 16904:2016) has been prepared by Technical Committee ISO/TC 67 “Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries” 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 September 2016, and conflicting national standards
shall be withdrawn at the latest by September 2016.
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 supersedes EN 1474-1:2008.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 16904:2016 has been approved by CEN as EN ISO 16904:2016 without any modification.

INTERNATIONAL ISO
STANDARD 16904
First edition
2016-02-15
Petroleum and natural gas
industries — Design and testing
of LNG marine transfer arms for
conventional onshore terminals
Industries du pétrole et du gaz naturel — Conception et essais des
bras de transfert de GNL sur des terminaux terrestres conventionnels
Reference number
ISO 16904:2016(E)
©
ISO 2016
ISO 16904:2016(E)
© ISO 2016, 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 2016 – All rights reserved

ISO 16904:2016(E)
Contents Page
Foreword .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 9
5 Design of the arms .10
5.1 Definition of the length and the configuration of the arms, arms description .10
5.1.1 General.10
5.1.2 Balancing .10
5.1.3 Arms dimensions and clearances .11
5.2 Design basis .11
5.2.1 Product line diameter and product data .11
5.2.2 Material and grades .11
5.2.3 Stress analysis .12
5.3 Swivel joints .15
5.3.1 General.15
5.3.2 Product sealing arrangement .16
5.3.3 Bearing system .16
5.3.4 External sealing arrangement .16
5.3.5 Design .16
5.4 Structural bearings .17
5.4.1 Design .17
5.4.2 Protection of structural bearings.18
5.4.3 Grease sampling point .18
5.5 Accessories .18
5.5.1 Adjustable support (jack) .18
5.5.2 Nitrogen injection line .18
5.5.3 Stowing locking device .18
5.5.4 Ladders and platforms . .19
5.5.5 Vapour recovery lines .19
5.5.6 Liquid nitrogen line .19
5.5.7 Thermal insulation .19
5.5.8 Ice fall protection .19
5.6 Pipework and fitting .19
5.6.1 Process connections . .19
5.6.2 Drain connection.19
5.6.3 Plugged connection .20
5.6.4 Valve .20
5.6.5 Connection flange.20
5.6.6 Gasket .20
5.7 Welding .20
5.8 Corrosion protection and embrittlement protection .20
5.8.1 Corrosion protection .20
5.8.2 Embrittlement protection .20
5.9 Maintenance .21
6 Safety systems .21
6.1 General .21
6.2 Two stage alarm and shutdown system .22
6.2.1 First stage .22
6.2.2 Second stage .22
6.3 Monitoring and alarm systems .22
6.3.1 Alarm envelopes .22
ISO 16904:2016(E)
6.3.2 Arm positioning alarms system .22
6.3.3 Arm constant position monitoring system (CPMS) .23
6.3.4 Pressure and hydraulic level alarm .23
6.4 ERS .23
6.4.1 General.23
6.4.2 Design of ERS .23
6.4.3 Safety devices on ERS .24
6.5 Safety devices .24
6.5.1 Fire safety requirements .24
6.5.2 Electrical safety requirements .25
6.5.3 Failure of electrical power supply.25
6.5.4 Stray current protectors .26
6.5.5 Bonding .26
7 Connection with the ship .26
7.1 General .26
7.2 Design of QCDC .26
7.3 QCDC system .27
7.4 Flange cover.27
8 Hydraulic and electric control systems .28
8.1 General .28
8.2 Arms operations .28
8.3 Hydraulic components .29
8.4 Electric components .30
8.5 Testing of control systems .30
8.6 Remote control .30
8.7 Transfer arms jetty control console .30
9 Inspection and tests .31
9.1 General .31
9.2 Prototype test .31
9.2.1 General.31
9.2.2 Swivel joint .31
9.2.3 ERS .34
9.2.4 QCDC .35
9.3 Manufacturing inspection and tests .37
9.3.1 General.37
9.3.2 Materials .37
9.3.3 Welding .37
9.3.4 Non-destructive test .37
9.3.5 Dimensional inspection .37
9.3.6 Pressure test .37
9.3.7 ERS .38
9.3.8 QCDC .38
9.3.9 Insulating flange (stray current protector) .39
9.3.10 Hydraulic circuit test .39
9.4 Factory acceptance tests .39
9.5 Site acceptance tests .40
9.5.1 General.40
9.5.2 Transfer arm assembly .41
9.5.3 Hydraulic circuit .42
10 Quality assurance and control.42
10.1 Quality system .42
10.2 Quality plan .42
11 Required documentation .43
Annex A (informative) Design data sheets .44
Annex B (informative) Reference table and figures .58
iv © ISO 2016 – All rights reserved

ISO 16904:2016(E)
Annex C (informative) Documentation requirements.62
Bibliography .67
ISO 16904:2016(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 WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries.
vi © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 16904:2016(E)
Petroleum and natural gas industries — Design and
testing of LNG marine transfer arms for conventional
onshore terminals
1 Scope
This International Standard specifies the design, minimum safety requirements and inspection
and testing procedures for liquefied natural gas (LNG) marine transfer arms intended for use on
conventional onshore LNG terminals, handling LNG carriers engaged in international trade. It can
provide guidance for offshore and coastal operations. It also covers the minimum requirements for safe
LNG transfer between ship and shore.
Although the requirements for power/control systems are covered, this International Standard does
not include all the details for the design and fabrication of standard parts and fittings associated with
transfer arms.
This International Standard is supplementary to local or national standards and regulations and is
additional to the requirements of ISO 28460.
This International Standard needs not be applied to existing facilities.
2 Normative references
The following referenced documents, in whole or in part, are normatively referenced in this document
and are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3452-1, Non-destructive testing — Penetrant testing — Part 1: General principles
ISO 4406, Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles
ISO 9934-1, Non-destructive testing — Magnetic particle testing — Part1: General principles
ISO 10474:2013, Steel and steel products — Inspection documents
ISO 10497, Testing of valves — Fire type-testing requirements
ISO 17636-1, Non-destructive testing of welds — Radiographic testing — Part 1: X- and gamma-ray
techniques with film
ISO 17636-2, Non-destructive testing of welds — Radiographic testing — Part 2: X- and gamma-ray
techniques with digital detectors
ISO 28460:2010, Petroleum and natural gas industries — Installation and equipment for liquefied natural
gas — Ship-to-shore interface and port operations
IEC 60034-5, Rotating electrical machines — Part 5: Degrees of protection provided by the integral design
of rotating electrical machines (IP code) — Classification
IEC 60079-0, Explosive atmospheres — Part 0: Equipment — General requirements
IEC 60079-1, Explosive atmospheres — Part 1: Equipment protection by flameproof enclosures “d”
IEC 60079-2, Explosive atmospheres — Part 2: Equipment protection by pressurized enclosures “p”
IEC 60079-5, Explosive atmospheres — Part 5: Equipment protection by powder filling “q”
ISO 16904:2016(E)
IEC 60079-6, Explosive atmospheres — Part 6: Equipment protection by oil immersion “o”
IEC 60079-7, Explosive atmospheres — Part 7: Equipment protection by increased safety “e”
IEC 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres
IEC 60079-11, Explosive atmospheres — Part 11: Equipment protection by intrinsic safety “i”
IEC 60079-14, Explosive atmospheres — Part 14: Electrical installations design, selection and erection
IEC 60079-18, Explosive atmospheres — Part 18: Equipment protection by encapsulation “m”
IEC 60079-25, Explosive atmospheres — Part 25: Intrinsically safe electrical systems
IEC 60529, Degrees of protection provided by enclosures (IP Code) and IEC 60529/A1&A2, Amendment 1&2
IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic safety-
related systems
IEC 62305-3, Protection against lightning — Part 3: Physical damage to structures and life hazard
ASME B16.5, Pipe Flanges and Flanged Fittings
ASMEBoiler and Pressure Vessel Code Section IX: Welding and Brazing Qualifications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
apex swivel
articulated, fluid-carrying joint located between the inboard arm (3.20) and outboard arm (3.32)
Note 1 to entry: See Figure B.2.
Note 2 to entry: It provides luffing (3.26) of the outboard arm relative to the inboard arm.
3.2
attitude
various modes of use and/or location of the transfer arm (3.59) (i.e. manoeuvring, stowed, connected,
hydrostatic test, and maintenance)
Note 1 to entry: The transfer arm can take several positions for each attitude.
3.3
base riser
riser
vertical assembly which bolts to the loading platform and supports the articulated assembly of the
transfer arm (3.59)
Note 1 to entry: See Figure B.2.
Note 2 to entry: Sometimes referred to as “standpost”.
3.4
bottom swivel
accommodates pitching (3.35) motion of LNG carrier (3.25) and is located adjacent to presentation flange
(3.37) in horizontal part of TSA (3.60)
Note 1 to entry: See Figure B.2.
2 © ISO 2016 – All rights reserved

ISO 16904:2016(E)
3.5
brinelling
any permanent indentation in swivel (3.55) or structural bearing (3.50) raceways caused by excessive
loading of balls or rollers
3.6
cargo manifold
pipe assembly mounted onboard LNG carrier (3.25) to which the presentation flange (3.37) or QCDC
(3.39) of the transfer arm (3.59) is connected
Note 1 to entry: See Figure B.2.
3.7
cavitation
formation and collapse of bubbles in a liquid when the pressure falls to or below the liquid vapour
pressure; the collapse releases energy, sometimes with an audible sound and vibration
Note 1 to entry: Such low pressures occur in high velocity zones such as the inner radius of elbows, or at places
with variations of diameters.
3.8
clash
any contact during design operational conditions, or as a result of an emergency separation, between
any part of a transfer arm (3.59) and:
— adjacent transfer arm while both arms are operating or one arm is operating and the other arm is
stowed [e.g. the counterweights (3.11)];
— adjacent section of the same transfer arm [e.g. triple swivel assembly (3.60) and outboard arm (3.32)];
— loading platform equipment [e.g. counterweight (3.11) and piping or valves]
3.9
contact angle
α
angle between the plane of the swivel joint (3.55) or structural bearing (3.50) balls or rollers and the
centre of contact at the ball or roller raceway interface
3.10
conventional onshore LNG terminal
LNG exporting or receiving terminal that is located on-shore and that has a marine transfer arms for
the loading or unloading of LNG carriers (3.25) in a harbour or other sheltered coastal location
3.11
counterweight
system of weights used to balance the inboard arm (3.20) and outboard arm (3.32) assemblies
Note 1 to entry: Some transfer arms (3.59) have a single counterweight for this function and others have multiple
counterweights.
3.12
design pressure
pressure for which the transfer arm (3.59) is designed
Note 1 to entry: See Table A.1.
3.13
design temperature
range of temperatures for which the transfer arm (3.59) is designed
Note 1 to entry: See Table A.1.
ISO 16904:2016(E)
3.14
drift
longitudinal and/or lateral displacement of the LNG carrier (3.25) under the influence of
environmental forces
Note 1 to entry: See also surge fore (3.52) or aft (3.51) and sway (3.54).
3.15
emergency release system
ERS
system that provides a positive means of quick release of transfer arms (3.59) and safe isolation
between the LNG carrier (3.25) and shore, following a predefined procedure including an emergency
shutdown (ESD) (3.16)
Note 1 to entry: See Figure B.2.
3.16
emergency shutdown
ESD
method that safely and effectively stops the transfer of LNG and vapour between the LNG carrier
(3.25) and shore
3.17
freeboard
vertical distance between the ship’s deck and the water level at the manifold location
Note 1 to entry: See Table A.3 and Figure A.1.
3.18
free wheel
ability of a hydraulically operated transfer arm (3.59) when connected to a LNG carrier (3.25) to follow
freely without hydraulic restraint the vertical and horizontal motions of the LNG carrier’s manifold
(draft changes and sway (3.54) and surge motions)
3.19
heave
vertical motion of the LNG carrier (3.25) due to wave action
Note 1 to entry: See Table A.4 and Figure A.2.
3.20
inboard arm
product-carrying pipe and any structural members contained between the apex swivel (3.1) and the
trunnion swivel (3.61)
Note 1 to entry: See Figure B.2.
3.21
included angle
angle formed between inboard arm (3.20) and outboard arm (3.32)
Note 1 to entry: See Figure B.2.
Note 2 to entry: The maximum and minimum included angles are left to the transfer arm manufacturer.
Note 3 to entry: The included angle in the stowed position of the transfer arms (3.59) is such, that the arms are
parked with the triple swivel assembly (3.60) behind the berthing line.
4 © ISO 2016 – All rights reserved

ISO 16904:2016(E)
3.22
insulating flange
electrical insulating system, usually dedicated, which is installed in the lower end of the outboard arm
(3.32) or in the vertical part of the triple swivel assembly (3.60)
Note 1 to entry: Its purpose is to prevent stray currents from causing an arc at the LNG carrier’s (3.25) flange as
the transfer arm (3.59) is connected or disconnected.
3.23
jack
permanent, adjustable load-carrying mechanism potentially installed in the triple swivel assembly (3.60)
to transfer a portion of the arm (3.59) fluid weight to the deck instead of the LNG carrier’s (3.25) manifold
Note 1 to entry: See Figure B.2.
3.24
jetty control centre
control centre situated on or adjacent to the jetty primarily to control and/or monitor the transfer arms
(3.59)
Note 1 to entry: Sometimes referred to as “jetty control room” or “local control room”.
3.25
LNG carrier
LNGC
tank ship designed for the carriage of LNG
3.26
luffing
rotary motions of the inboard arm (3.20) and outboard arm (3.32) in the vertical plane
Note 1 to entry: See Figure B.2.
3.27
main hydraulic unit
MHU
hydraulic unit that generates hydraulic power to ensure the normal operation and emergency release
sequence of the arms
3.28
manifold setback
horizontal distance between the board side of LNG carrier (3.25) and the face of cargo manifold (3.6)
Note 1 to entry: See Table A.3 and Figure A.1.
3.29
manifold spacing
horizontal distance between two adjacent cargo manifold (3.6) flange axes
Note 1 to entry: See Table A.3 and Figure A.1.
3.30
middle swivel
accommodates yawing (3.63) and surge of LNG carrier (3.25) and is located between top swivel (3.57)
and bottom swivel (3.4) in vertical part of TSA (3.60)
Note 1 to entry: See Figure B.2.
3.31
operating envelope
volume in which presentation flange(s) (3.37) of a (group of) transfer arm(s) (3.59) is (are) required to
operate
ISO 16904:2016(E)
3.32
outboard arm
product-carrying pipe and any structural members contained between the apex swivel (3.1) and the
triple swivel assembly (3.60)
Note 1 to entry: See Figure B.2.
3.33
owner
designated agent
company or group of companies for whose use the transfer arms (3.59) are installed, responsible for the
safe design and construction of the installation
3.34
pantograph system
system for transmitting balancing loads from the outboard arm (3.32) to the counterweight(s) (3.11)
Note 1 to entry: The system comprises an assembly of linkages and pinned connections, or a cable and sheaves
system (respectively, “rigid link pantograph” and “cables and sheaves pantograph”).
3.35
pitch
rotation of the LNG carrier (3.25) around transversal horizontal axis
Note 1 to entry: See Table A.4 and Figure A.2.
3.36
powered emergency release coupling
PERC
powered device to provide a means of quick release of the transfer arms (3.59) when such action is
required only as an emergency measure
3.37
presentation flange
transfer arm (3.59) flange for connection to either the cargo manifold (3.6) or spool piece (3.47)
Note 1 to entry: See Figure B.2.
3.38
product
fluid transferred using transfer arms (3.59)
Note 1 to entry: Fluids are LNG, NG or LN .
3.39
quick connect disconnect coupler
QCDC
coupler
manual or hydraulic mechanical device used to connect the transfer arm (3.59) to the cargo manifold
(3.6) without employing bolts
Note 1 to entry: See Figure B.2.
3.40
remote pendant control
remote control
device to facilitate the fine manoeuvring operation of the transfer arms (3.59) from a remote location
(e.g. LNG carrier’s (3.25) cargo manifold (3.6) area)
Note 1 to entry: The system can use a trailing wire or radio-controlled system.
6 © ISO 2016 – All rights reserved

ISO 16904:2016(E)
3.41
riser and trunnion swivel assembly
fluid carrying system consists of riser swivel (3.43), trunnion swivel (3.61) and elbows and mounted on
top of the base riser (3.3)
Note 1 to entry: See Figure B.2.
3.42
riser flange
transfer arm (3.59) flange for connection to LNG piping
Note 1 to entry: See Figure B.2.
3.43
riser swivel
swing joint in the riser and trunnion swivel assembly (3.41) which permits slewing (3.46) of the
transfer arm (3.59)
Note 1 to entry: See Figure B.2.
3.44
roll
rotation of LNG carrier (3.25) around longitudinal horizontal axis
Note 1 to entry: See Table A.4 and Figure A.2.
3.45
safety integrity level
SIL
statistical representations of the integrity of the safety instrumented system when a process
demand occurs
Note 1 to entry: See Clause 6.
3.46
slew
horizontal, rotary motion of the transfer arm (3.59) around the base riser (3.3)
Note 1 to entry: See Figure B.2.
3.47
spool piece
short length of pipe for the purpose of matching the cargo manifold (3.6) to the presentation flange
(3.37) or QCDC (3.39)
Note 1 to entry: Sometimes referred to as “adaptor” or “short distance piece”.
3.48
spotting line
pre-determined location on the jetty used by the LNG carrier (3.25) when berthing to align with the
LNG carrier vapour manifold
Note 1 to entry: See Figure A.4.
3.49
stress analysis
detailed calculation of the structural loading in the transfer arm (3.59) and cargo manifold (3.6) for
various positions and attitudes to check the integrity of the transfer arm for the service intended
ISO 16904:2016(E)
3.50
structural bearing
bearing in the load carrying components supporting the product line that, in combination, allow the
transfer arm (3.59) to follow freely the motion of the LNG carrier (3.25)
3.51
surge aft
longitudinal LNG carrier (3.25) afterward motion
Note 1 to entry: See Table A.4 and Figure A.2.
3.52
surge fore
longitudinal LNG carrier (3.25) forward motion
Note 1 to entry: See Table A.4 and Figure A.2.
3.53
surge pressure
rapid change in pressure as a consequence of a change in flow rate in a pipeline and/or piping systems
(including transfer arms (3.59))
3.54
sway
transverse LNG carrier (3.25) motion
Note 1 to entry: Se
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