EN ISO 20257-1:2020

Installation and equipment for liquefied natural gas - Design of floating LNG installations - Part 1: General requirements (ISO 20257-1:2020, Corrected version 2020-10)

This document provides requirements and guidance for the design and operation of floating liquefied natural gas (LNG) installations, including installations for the liquefaction, storage, vaporisation, transfer and handling of LNG, in order to have a safe and environmentally acceptable design and operation of floating LNG installations.
This document is applicable to:
—     floating LNG liquefaction installations (plant) — FLNG;
—     floating LNG regasification installations (plant) — FSRU;
—     floating storage units — FSU.
This document is applicable to offshore, near-shore or docked floating LNG installations.
This document includes any jetty in the scope in case of docked floating LNG installations with regards to the mooring. This document briefly describes floating LNG mooring concepts.
This document is applicable to both newbuilt and converted floating LNG installations, and addresses specific requirements.
This document is not applicable to:
—     onshore LNG storage, liquefaction and/or regasification installations/plants, except for docked FSRU and/or FLNG installations;
—     offshore LNG plants based on non-floating structure (such as gravity based structure [GBS] principle); and
—     support onshore based facilities (such as support vessels, tugs, etc.).
This document is not intended for design floating power generation facilities though relevant parts of this document can be used.
This document is not intended to cover LNG as fuel bunkering applications.

Anlagen und Ausrüstung für Flüssigerdgas - Auslegung von schwimmenden Flüssigerdgas-Anlagen - Teil 1: Allgemeine Anforderungen (ISO 20257-1:2020, korrigierte Fassung 2020-10)

Dieses Dokument legt Anforderungen und Anleitungen in Bezug auf die Auslegung und den Betrieb von schwimmenden Flüssigerdgasanlagen (en: liquefied natural gas, LNG) fest, einschließlich der Anlagen zur Verflüssigung, Speicherung, Verdampfung, Übergabe und Handhabung von LNG, damit Auslegung und Betrieb von schwimmenden LNG-Anlagen sicher und umweltfreundlich möglich sind.
Dieses Dokument ist anwendbar auf:
- schwimmende LNG-Verflüssigungsanlagen — FLNG;
- schwimmende LNG-Wiederverdampfungsanlagen — FSRU;
- schwimmende Speichereinheiten — FSU.
Dieses Dokument ist auf Offshore-Anlagen, Anlagen in Küstennähe oder angedockte schwimmende LNG Anlagen anwendbar.
Der Anwendungsbereich dieses Dokuments umfasst bei angedockten schwimmenden LNG Anlagen jegliche Piere im Hinblick auf die Vertäuung. Dieses Dokument beschreibt Vertäuungskonzepte für schwimmende LNG Anlagen.
Dieses Dokument gilt sowohl für neu gebaute als auch umgebaute schwimmende LNG Anlagen und behandelt spezielle Anforderungen.
Dieses Dokument ist nicht anwendbar auf:
- an Land befindliche Anlagen zur LNG-Speicherung, -Verflüssigung und/oder -Wiederverdampfung, mit Ausnahme von angedockten FSRU- und/oder FLNG Anlagen;
- Offshore LNG-Anlagen basierend auf nicht schwimmenden Strukturen (etwa das Prinzip auf Schwerkraft basierender Strukturen); und
- unterstützende Onshore-Anlagen (etwa Versorgungsschiffe, Schleppboote usw.).
Dieses Dokument ist nicht speziell für die Auslegung schwimmender Anlagen zur Stromerzeugung vorgesehen, relevante Teile dieses Dokumentes können jedoch verwendet werden.
Dieses Dokument ist nicht dazu vorgesehen, Anwendungen zum Bunkern von Kraftstoff für LNG abzudecken.

Installations et équipements de gaz naturel liquéfié - Conception des installations flottantes de GNL - Partie 1: Exigences générales (ISO 20257-1:2020, Version corrigée 2020-10)

Le présent document fournit des exigences et des recommandations concernant la conception et l'exploitation des installations flottantes de gaz naturel liquéfié (GNL), y compris les installations destinées à la liquéfaction, au stockage, à la vaporisation, au transfert et à la manipulation du GNL afin d'obtenir une conception et une exploitation sans danger et écologiquement acceptable des installations flottantes de GNL.
Le présent document est applicable :
—     aux terminaux flottants de liquéfaction de GNL (installation) ? FLNG ;
—     aux terminaux flottants de regazéification de GNL (installation) ? FSRU ;
—     aux unités flottantes de stockage ? FSU.
Le présent document est applicable aux installations flottantes de GNL en mer, à proximité de la côte ou à quai dans un port.
Le présent document inclut tous les appontements éventuels dans son domaine d'application dans le cas d'installations flottantes de GNL à quai pour ce qui est de l'amarrage. Le présent document décrit brièvement les concepts d'amarrage du GNL flottant.
Le présent document est applicable aux installations flottantes de GNL nouvellement construites aussi bien qu'aux installations converties et il couvre les exigences spécifiques.
Le présent document ne s'applique pas :
—     aux installations/terminaux terrestres de stockage, liquéfaction et/ou regazéification de GNL, à l'exception des installations de FSRU et/ou FLNG à quai ;
—     aux terminaux de GNL en mer basés sur une structure non flottante (comme le principe d'une structure gravitaire) ; ni
—     aux installations de soutien basées à terre (comme les navires de soutien, les remorqueurs, etc.).
Le présent document n'est pas destiné à la conception des installations flottantes d'alimentation en électricité bien que des parties pertinentes puissent être utilisées à ces fins.
Le présent document n'a pas vocation à traiter des GNL destinés aux applications de soutage de carburant.

Napeljave in oprema za utekočinjeni zemeljski plin - Načrtovanje plavajočih napeljav za utekočinjeni zemeljski plin - 1. del: Splošne zahteve (ISO 20257-1:2020)

General Information

• Status: Published
• Publication Date: 05-May-2020
• Withdrawal Date: 29-Nov-2020
• 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: 06-May-2020
• Completion Date: 06-May-2020
• Ref Project: SIST EN ISO 20257-1:2020 - Installation and equipment for liquefied natural gas - Design of floating LNG installations - Part 1: General requirements (ISO 20257-1:2020)

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2020
Napeljave in oprema za utekočinjeni zemeljski plin - Načrtovanje plavajočih
napeljav za utekočinjeni zemeljski plin - 1. del: Splošne zahteve (ISO 20257-1:2020)
Installation and equipment for liquefied natural gas - Design of floating LNG installations
- Part 1: General requirements (ISO 20257-1:2020)
Anlagen und Ausrüstung für Flüssigerdgas - Auslegung von schwimmenden
Flüssigerdgas-Anlagen - Teil 1: Allgemeine Anforderungen (ISO 20257-1:2020)
Installations et équipements de gaz naturel liquéfié - Conception des installations
flottantes de GNL - Partie 1: Exigences générales (ISO 20257-1:2020)
Ta slovenski standard je istoveten z: EN ISO 20257-1:2020
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20257-1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2020
EUROPÄISCHE NORM
ICS 75.200
English Version
Installation and equipment for liquefied natural gas -
Design of floating LNG installations - Part 1: General
requirements (ISO 20257-1:2020)
Installations et équipements de gaz naturel liquéfié - Anlagen und Ausrüstung für Flüssigerdgas - Auslegung
Conception des installations flottantes de GNL - Partie von schwimmenden Flüssigerdgas-Anlagen - Teil 1:
1: Exigences générales (ISO 20257-1:2020) Allgemeine Anforderungen (ISO 20257-1:2020)
This European Standard was approved by CEN on 7 March 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20257-1:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 20257-1:2020) 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 November 2020, and conflicting national standards
shall be withdrawn at the latest by November 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 20257-1:2020 has been approved by CEN as EN ISO 20257-1:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 20257-1
First edition
2020-04
Installation and equipment for
liquefied natural gas — Design of
floating LNG installations —
Part 1:
General requirements
Installations et équipements de gaz naturel liquéfié — Conception des
installations flottantes de GNL —
Partie 1: Exigences générales
Reference number
ISO 20257-1:2020(E)
©
ISO 2020
ISO 20257-1:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 20257-1:2020(E)
Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Abbreviated terms . 8
4 Basis of design .11
4.1 Site and meteocean conditions .11
4.1.1 Site study .11
4.1.2 Earthquake .13
4.1.3 Location .13
4.1.4 Other studies .14
4.2 Design criteria .14
4.2.1 General.14
4.2.2 Topsides .15
4.2.3 Transfer systems .16
4.2.4 Hull . .20
4.2.5 LNG storage .22
4.2.6 Mooring .23
4.2.7 Pipe-work .25
5 Health, safety and the environment .26
5.1 General .26
5.1.1 Main objectives .26
5.1.2 Main principles .26
5.2 Identification of safety and environmental barriers and design requirements .27
5.2.1 General.27
5.2.2 Purpose .27
5.2.3 Safety and environmental barriers .28
5.2.4 Generic barriers .28
5.2.5 Safety and environmental barriers identification process .29
5.2.6 Safety and environmental barriers design requirements .30
5.2.7 Safety and environmental barriers design requirements certification .30
5.3 Environmental considerations .31
5.3.1 General.31
5.3.2 Floating LNG installations specificities .31
5.3.3 Environmental aspects identification .31
5.3.4 Environmental design review . .32
5.3.5 Environmental design requirements .32
5.4 Safety considerations .39
5.4.1 General.39
5.4.2 Safety strategies and philosophies .39
5.4.3 Safety reviews .40
5.4.4 Qualitative risk assessment, QRA and specific safety studies.42
5.4.5 Risk prevention measures (typical list) .46
5.4.6 Emergency response .59
5.5 Occupational health and industrial hygiene considerations .61
5.5.1 Occup
...