ISO/TR 17177:2015

TECHNICAL ISO/TR
REPORT 17177
First edition
2015-04-01
Petroleum and natural gas
industries — Guidelines for the marine
interfaces of hybrid LNG terminals
Pétrole et industries du gaz naturel — Lignes directrices pour les
interfaces de terminaux hybrides de GNL
Reference number
©
ISO 2015
© ISO 2015
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Terms, definitions, and abbreviated terms . 1
2.1 Terms and definitions . 1
2.2 Abbreviated terms . 3
3 Hazards of LNG and high pressure natural gas (HPNG) transfer . 4
3.1 General . 4
3.2 Hazards of LNG . 4
3.3 Hazards of high pressure natural gas . 5
3.4 Potential hazardous situations associated with hybrid LNG terminal operations . 5
4 Siting of facility . 6
4.1 General . 6
4.2 Metocean conditions . 6
4.3 Geological conditions and hazards . 7
4.4 Environmental and socio-economic impacts . 7
5 Marine transfer systems . 8
5.1 General . 8
5.2 Marine loading arms (MLAs) for LNG and HPNG . 8
5.2.1 Marine loading arms for LNG . 8
5.2.2 Marine loading arms for high pressure natural gas (HPNG MLA) . 9
5.3 Marine hose transfer systems . 9
5.3.1 Hose systems for LNG transfer . 9
5.3.2 Hose systems for HPNG transfer .10
6 Marine operations .10
6.1 General .10
6.2 Terminal information .10
6.3 Marine exclusion zones .11
6.4 Marine interface .11
6.4.1 General.11
6.4.2 Mooring arrangements and fenders .11
6.4.3 Berthing and mooring aids .12
6.4.4 Manifold arrangements .12
6.4.5 Electrical isolation .12
6.4.6 Hose supports and handling .13
7 Data and voice communications .13
8 Hazard management .13
8.1 General .13
8.2 Protection of leakage of LNG and HPNG .13
8.3 Fire and explosion hazard management .14
8.3.1 General.14
8.3.2 Firefighting and emergency response .14
9 Security.15
10 Access and egress .15
11 Cargo transfer .16
11.1 General .16
11.1.1 Management and communication .16
11.1.2 Conditions to be fulfilled prior to the transfer of LNG .16
11.1.3 Conditions to be fulfilled prior to the transfer of HPNG .16
11.1.4 Cargo transfer operations .16
11.1.5 Normal disconnection .16
11.2 Emergency shut-down and emergency release systems .17
11.2.1 General.17
11.2.2 Emergency shut-down and emergency release systems for LNG MLA .17
11.2.3 Emergency shut-down and emergency release systems for LNG transfer hoses .17
11.2.4 Emergency shut-down and emergency disconnect systems for HPNG MLA .17
11.2.5 Safety and maintenance of transfer systems .18
12 Custody transfer measurement system .19
13 Provision and training of staff .19
Annex A (informative) ESD I and ESD II systems — Typical arrangements .20
Annex B (informative) Typical configurations .24
Bibliography .27
iv © ISO 2015 – All rights reserved

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
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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.
Introduction
The recent expansion of the LNG industry has led to the development of marine LNG facilities and
transfer systems that differ from conventional LNG facility designs. These LNG transfer facilities can
require additional or alternative systems and/or operational procedures to enable their safe operation.
This Technical Report is intended to provide guidance for aspects of these facilities not covered by
current standards and gui
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