Installation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 3: Offshore transfer systems

This European Standard gives general guidelines for the design of liquefied natural gas (LNG) transfer systems intended for use on offshore transfer facilities or on coastal weather exposed transfer facilities. The transfer facilities considered may be between floating units, or between floating and fixed units. The specific component details of the LNG transfer systems are not covered by this European Standard.
Reference is made to EN 1474-1 and EN 1474-2 where appropriate.
As a general statement the present standard applies to all transfer systems given in the scope. However, some transfer system designs may require a deviation from the full standard as described in normative
Annex A.

Anlagen und Ausrüstung für Flüssigerdgas - Auslegung und Prüfung von Schiffsübergabesystemen - Teil 3: Offshore-Übergabesysteme

Diese Europäische Norm gibt eine allgemeine Richtlinie für die Auslegung von Erdgas- (LNG, en: liquified
natural gas) Übergabesystemen, die zur Nutzung in Offshore-Übergabeeinrichtungen vorgesehen sind, oder
in Übergabeeinrichtungen, die Seewetter ausgesetzt sind. Die betrachteten Übergabesysteme können
zwischen schwimmenden Einheiten, oder zwischen schwimmenden und festen Einheiten eingesetzt sein. Die
Bauteile der LNG-Übergabesysteme werden von dieser Europäischen Norm nicht erfasst.
Es wird auf EN 1474-1 und EN 1474-2 verwiesen, wo dies zutreffend ist.
Grundsätzlich ist diese Norm anwendbar auf alle Übergabesysteme, die im Anwendungsbereich genannt sind.
Allerdings können einige Ausführungen von Übergabesystemen eine Abweichung von dieser vollständigen
Norm erfordern, wie dies im normativen Anhang A beschrieben ist.

Installations et équipements de gaz naturel liquéfié - Conception et essais des systèmes de transfert marins - Partie 3: Systèmes de transfert offshore

Cette Norme européenne fournit des lignes directrices relatives à la conception de systèmes de transfert de
gaz naturel liquéfié (GNL) destinés à être utilisés dans les installations de transfert offshore ou dans les
installations côtières exposées aux intempéries. Les installations de transfert concernées peuvent se trouver
entre unités flottantes ou entre unités flottantes et unités fixes. Les composants des sections de transfert de
GNL ne sont pas couverts par la présente Norme européenne.
Il est recommandé de se référer, le cas échéant, à l’EN 1474-1 et à l’EN 1474-2.
La présente norme s’applique, en temps qu’instruction générale à tous les bras de chargement/déchargement
donnés dans le domaine d’application. Cependant, la conception de quelques bras de
chargement/déchargement peut requérir une déviation à l’intégralité de la norme, comme décrit en Annexe A.

Napeljave in oprema za utekočinjeni zemeljski plin - Načrtovanje in preskušanje obalnih pretakališč - 3. del: Pretakališča na morju

General Information

Status
Published
Publication Date
02-Dec-2008
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
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Start Date
02-Dec-2025
Completion Date
02-Dec-2025
Ref Project
SIST EN 1474-3:2009 - Installation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 3: Offshore transfer systems

Overview

EN 1474-3:2008 is the CEN European Standard that provides general guidelines for the design of liquefied natural gas (LNG) marine transfer systems for offshore transfer systems and coastal, weather‑exposed facilities. It covers transfer systems used between floating units or between floating and fixed units. The standard sets out system requirements, overall safety philosophy and functional performance targets but does not prescribe specific component details (see EN 1474‑1 and EN 1474‑2 for arms and hoses). Normative Annex A describes procedures for permitted deviations.

Key topics and technical requirements

The standard focuses on system‑level design and integrity with emphasis on safety, operability and verification. Major technical topics include:

  • System definition and functional targets - defining operational modes (attitudes) such as manoeuvring, stowed, connected and maintenance.
  • Overall safety philosophy - owner‑defined safety objectives, risk categorisation and acceptance criteria.
  • Risk assessment and design principles - hazard identification, risk analysis, risk reduction and defining safety‑critical elements.
  • Design qualification and technology assessment - new‑design qualification, failure mode identification, analysis, testing and reliability analysis.
  • Design basis and criteria - supporting structures, transfer line sizing, dimensions, clearances, stress analysis and fatigue (dynamic behaviour / cyclic motions).
  • Special elements - product swivel joints, structural bearings, couplers (including Emergency Release Couplings ERC) and Emergency Release Systems (ERS).
  • Safety systems and interfaces - position monitoring, alarms, emergency shutdown (ESD), communications, evacuation and rescue.
  • Operational design, inspection, testing and documentation - control design, quality assurance, tests and required documentation through the lifecycle.

Applications and who uses it

EN 1474‑3:2008 is used by professionals involved in the design, procurement, certification and operation of offshore LNG transfer facilities:

  • LNG terminal owners and operators (floating or fixed terminals)
  • FEED and detailed design engineers, naval architects and structural engineers
  • Manufacturers and integrators of transfer systems, swivels and couplers
  • Safety, reliability and instrumentation engineers implementing ESD/ERS
  • Classification societies, certification bodies and regulators Practical uses include developing performance standards, conducting risk assessments, preparing design specifications, and setting inspection/test regimes for offshore LNG transfer projects.

Related standards

  • EN 1474‑1 (transfer arms) and EN 1474‑2 (transfer hoses)
  • EN 1473 (onshore LNG installations)
  • EN 1532 (ship-to-shore interface)
  • EN 61511 series (functional safety / safety instrumented systems)
  • EN ISO 9000 / EN ISO 9001 (quality management)

EN 1474‑3:2008 is a system‑level reference for safe, standardized offshore LNG transfer system design and verification.

Frequently Asked Questions

EN 1474-3:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Installation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 3: Offshore transfer systems". This standard covers: This European Standard gives general guidelines for the design of liquefied natural gas (LNG) transfer systems intended for use on offshore transfer facilities or on coastal weather exposed transfer facilities. The transfer facilities considered may be between floating units, or between floating and fixed units. The specific component details of the LNG transfer systems are not covered by this European Standard. Reference is made to EN 1474-1 and EN 1474-2 where appropriate. As a general statement the present standard applies to all transfer systems given in the scope. However, some transfer system designs may require a deviation from the full standard as described in normative Annex A.

This European Standard gives general guidelines for the design of liquefied natural gas (LNG) transfer systems intended for use on offshore transfer facilities or on coastal weather exposed transfer facilities. The transfer facilities considered may be between floating units, or between floating and fixed units. The specific component details of the LNG transfer systems are not covered by this European Standard. Reference is made to EN 1474-1 and EN 1474-2 where appropriate. As a general statement the present standard applies to all transfer systems given in the scope. However, some transfer system designs may require a deviation from the full standard as described in normative Annex A.

EN 1474-3:2008 is classified under the following ICS (International Classification for Standards) categories: 75.200 - Petroleum products and natural gas handling equipment. The ICS classification helps identify the subject area and facilitates finding related standards.

You can purchase EN 1474-3:2008 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Anlagen und Ausrüstung für Flüssigerdgas - Auslegung und Prüfung von Schiffsübergabesystemen - Teil 3: Offshore-ÜbergabesystemeInstallations et équipements de gaz naturel liquéfié - Conception et essais des systemes de transfert marins - Partie 3: Systemes de transfert offshoreInstallation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 3: Offshore transfer systems75.200Petroleum products and natural gas handling equipmentICS:Ta slovenski standard je istoveten z:EN 1474-3:2008SIST EN 1474-3:2009en,fr,de01-marec-2009SIST EN 1474-3:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1474-3December 2008ICS 75.200 English VersionInstallation and equipment for liquefied natural gas - Design andtesting of marine transfer systems - Part 3: Offshore transfersystemsInstallations et équipements de gaz naturel liquéfié -Conception et essais des systèmes de transfert marins -Partie 3: Systèmes de transfert offshoreAnlagen und Ausrüstung für Flüssigerdgas - Auslegung undPrüfung von Schiffsübergabesystemen - Teil 3: Offshore-ÜbergabesystemeThis European Standard was approved by CEN on 1 November 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1474-3:2008: ESIST EN 1474-3:2009

Procedure for deviation from the full standard.26 Bibliography.27
Annex A. 2 Normative references The following referenced documents are indispensable for the application 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. EN 1473, Installation and equipment for liquefied natural gas — Design of onshore installations EN 1474-1:2008, Installation and equipment for liquefied natural gas — Part 1: Design and testing of transfer arms EN 1474-2:2008, Installation and equipment for liquefied natural gas — Part 2: Design and testing of transfer hoses EN 1532, Installation and equipment for liquefied natural gas — Ship to shore interface EN 61511-1, Functional safety — Safety instrumented systems for the process industry sector — Part 1: Framework, definitions, system, hardware and software requirements (IEC 61511-1:2003 + corrigendum 2004) EN 61511-2, Functional safety — Safety instrumented systems for the process industry sector — Part 2: Guidelines for the application of IEC 61511-1 (IEC 61511-2:2003) EN 61511-3, Functional safety — Safety instrumented systems for the process industry sector — Part 3: Guidance for the determination of the required safety integrity levels (IEC 61511-3:2003 + corrigendum 2004) EN ISO 9000, Quality management systems — Fundamentals and vocabulary (ISO 9000:2005) EN ISO 9001, Quality management systems — Requirements (ISO 9001:2000) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 attitude various modes of use and/or location of the transfer system (i.e. manoeuvring, stowed, connected, washing, hydrostatic test and maintenance). The transfer system may take several positions for each attitude NOTE Transfer system see 3.18. SIST EN 1474-3:2009

storing of transfer equipment;  transfer capacities for LNG and vapour return (volume flow, pressure, temperature);  availability requirements;  requirements for the ESD system (sequence, timing, process responses);  regulatory requirements;  requirements related to local regulations, flag if any;  owner QA requirements, such as classification, certification requirements. 4.4 Design principles and risk assessment methodology A risk assessment shall be conducted as part of the overall assessment of the LNG transfer system. In general for the overall system assessment the following objectives would apply:  evaluation of the design and operational procedures;  determination of the limiting conditions for the offloading operations;  assessment of safety and operability via risk assessment techniques;  determination of regulatory compliance (certification, classification): this section describes the design principles and the approach to establish design requirements for the transfer system. Risks shall be assessed in accordance with recognized methods and risk studies shall be performed by qualified and competent persons with the necessary understanding of risk, and the risk assessment process. The risk assessment methodology and tools, assumptions, and system boundary limits shall be clearly documented. A risk based approach shall be used to ensure that:  critical elements and operations are identified;  performance standards are defined when applicable;  controls and mitigating measures are identified; SIST EN 1474-3:2009

1 2 3 New 2 3 4 This classification implies the following: 1) no new technical uncertainties; 2) new technical uncertainties; 3) new technical challenges; 4) demanding new technical challenges. This classification applies to the totality of the applied technology as well as each separate part, function and subsystem forming it. It shall be used to highlight where care needs to be taken due to limited field history. Technology in Class 1 is proven technology where proven methods for qualification, tests, calculations and analysis can be used to document margins. Technology defined as Class 2 to 4 is defined as new technology, and shall be qualified according to Clause 5. The distinguishing between 2, 3 and 4 makes it possible to focus on the areas of concern. 4.5 Design principles The following principles shall apply in addition to the identified requirements from a risk assessment: General 1) Transfer system shall be designed, constructed and maintained with sufficient integrity to withstand operational and environmental loading throughout the system lifecycle, refer to Clause 6). 2) Systems and structures shall be designed with suitable functionality and survivability for prevention, detection, control and mitigation of foreseeable accident events affecting the installation. 3) Systems and structures shall be designed in compliance with internationally accepted codes and standards. 4) Where novel transfer solutions (new technology or novel application of known technology) are intended to be used, this technology is to undergo a recognized qualification procedure. Refer to Clause 5. SIST EN 1474-3:2009
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Die Norm EN 1474-3:2008 bietet grundlegende Richtlinien für das Design von Flüssigerdgas (LNG) Transferanlagen, die für den Einsatz in Offshore-Transfereinrichtungen oder in exponierten Küsten-Transferanlagen vorgesehen sind. Sie beschreibt die allgemeinen Anforderungen und Vorgaben für die Installation und die Ausrüstung dieser Systeme, ohne jedoch spezifische Komponenten im Detail zu behandeln. Die Bedeutung dieser Norm liegt in ihrer Fähigkeit, Sicherheit und Effizienz in der Handhabung von LNG während des Transfers zwischen schwimmenden Einheiten oder zwischen schwimmenden und festen Einheiten zu gewährleisten. Ein wesentlicher Vorteil der EN 1474-3:2008 ist ihr umfassender Ansatz zur Standardisierung von Offshore-Transfersystemen, was eine wesentliche Voraussetzung für die sich entwickelnde LNG-Industrie darstellt, insbesondere angesichts der steigenden globalen Nachfrage nach Flüssigerdgas. Die Norm berücksichtigte verschiedene Designkonzepte und bietet somit Flexibilität für die technischen Lösungen, die benötigt werden, um spezifische Anforderungen von Transferanlagen zu erfüllen. Diese Flexibilität ist besonders wichtig, da Offshore-Umgebungen oftmals variierende Bedingungen aufweisen, die zusätzliche Herausforderungen bei der Konstruktion und dem Betrieb der Transferanlagen darstellen. Darüber hinaus verweist die Norm auf relevante angrenzende Standards wie EN 1474-1 und EN 1474-2, die dabei helfen, eine konsistente und integrierte Herangehensweise zu gewährleisten. Durch diese Querverweise wird sichergestellt, dass Nutzer der Norm auf ein breiteres Spektrum an Informationen und Leitlinien zugreifen können, die für die Sicherheit und Effizienz von LNG-Transfersystemen von Bedeutung sind. Insgesamt stellt die EN 1474-3:2008 ein fundamentales Dokument dar, das für Hersteller, Betreiber und Planer von LNG-Transferanlagen von erheblicher Relevanz ist. Die Norm liefert die notwendige Struktur und die Standards, die eingehalten werden müssen, um die Funktionalität und Sicherheit dieser kritischen Infrastruktur zu gewährleisten.

La norme SIST EN 1474-3:2009 traite de l'installation et de l'équipement pour le gaz naturel liquéfié (GNL), en se concentrant sur la conception et l'essai des systèmes de transfert maritimes, spécifiquement pour les systèmes de transfert en mer. Cette norme européenne fournit des lignes directrices générales pour la conception des systèmes de transfert de GNL destinés aux installations offshore ou à celles exposées aux conditions météorologiques côtières. La portée de cette norme est particulièrement pertinente dans le contexte actuel de la transition énergétique, où le GNL joue un rôle croissant en tant que source d'énergie plus propre. Les installations de transfert consideradas incluent aussi bien les unités flottantes que les unités fixes, ce qui témoigne de la diversité d'application de cette norme. En outre, la norme mentionne des références à d'autres normes, telles que EN 1474-1 et EN 1474-2, ce qui augmente sa cohérence et son intégration dans le cadre réglementaire plus large de la manipulation du GNL. Parmi les points forts de cette norme, on note sa capacité à s'adapter aux différents systèmes de transfert, en tenant compte que certains designs peuvent nécessiter des déviations des exigences standards. Cela permet aux ingénieurs et concepteurs de prendre en compte des spécificités techniques tout en restant conformes aux bonnes pratiques de sécurité et d’efficacité. En résumé, la norme SIST EN 1474-3:2009 est essentielle pour assurer la sécurité et la fiabilité des systèmes de transfert de GNL en mer, en adressant des problématiques cruciales pour les installations offshore. Grâce à ses lignes directrices claires et sa prise en compte de divers scénarios de transfert, cette norme reste un référentiel vital pour les professionnels du secteur.

SIST EN 1474-3:2009は、液化天然ガス（LNG）の海上移転システムの設計と試験に関する標準であり、その範囲は非常に明確です。この標準は、海上移転施設や海岸において気候の影響を受ける移転施設で使用されるLNG移転システムの設計に関する一般的なガイドラインを提供します。特に、移転施設が浮体間または浮体と固定施設間である場合に適用されます。 この標準の強みの一つは、その包括的なガイダンスです。設計者やエンジニアがLNG移転システムの設計を行う際に、基準となる情報を提供し、適切な設計を確保するための役立つ資料となっています。また、EN 1474-1およびEN 1474-2との関係が適宜言及されており、関連性の高い基準とのリンクを通じて、全体的な理解を深める助けとなります。 さらに、SIST EN 1474-3:2009は、特定の構成要素の詳細には触れていませんが、すべての移転システムの設計に適用される一般的な声明を示しています。これは、設計プロセスにおいて柔軟性を持たせるため、さまざまな条件に対応したLNG移転システムの設計を可能にします。ただし、規範的附属書Aに記載されているように、一部の移転システム設計では完全な標準からの逸脱が必要となる場合があることも考慮されており、実践的な適用を考慮した設計が可能です。 総じて、SIST EN 1474-3:2009は、海上移転システムの設計に特化した重要な標準であり、業界の規範に対する信頼性と関連性を提供します。この標準を参照することで、液化天然ガスの安全かつ効率的な移転を実現するための基盤が整えられます。

SIST EN 1474-3:2009 표준은 액화천연가스(LNG) 전송 시스템의 설계 및 테스트에 대한 필수 지침을 제공하며, 특히 해양 전송 시스템에 중점을 두고 있습니다. 이 표준은 해양 전송 시설이나 기상에 노출된 해안 전송 시설에서의 사용을 위해 액화천연가스 전송 시스템 설계에 대한 전반적인 가이드라인을 제시합니다. 이 표준의 강점은 다양한 전송 시설 간의 연결을 지원하는 설계 원칙에 대한 명확한 방향성을 제공한다는 점입니다. 이는 부유하는 유닛 간의 전송이든, 부유 유닛과 고정 유닛 간의 전송이든 모두 포함됩니다. 또한, EN 1474-1 및 EN 1474-2와 같이 이전 표준과의 연계를 통해 전체적인 통합된 접근 방식을 유지하고 있습니다. SIST EN 1474-3:2009 표준은 해양 전송 시스템의 설계에 있어 유연성을 허용합니다. 그러나 이러한 유연성은 특정 전송 시스템 설계가 표준의 모든 부분에서 벗어날 필요가 있는 경우, 규범적 부록 A에 명시된 대로 조정되어야 합니다. 이는 해당 분야에서의 진화하는 요구와 기술 변화에 대해 적절하게 반응할 수 있도록 설계되었습니다. 결론적으로, SIST EN 1474-3:2009 표준은 액화천연가스 전송 시스템의 설계와 관련된 안전성과 효율성을 보장하는 중요한 지침서로, 해양 환경에서의 적용 가능성을 높이고 있습니다.

The EN 1474-3:2008 standard, specifically titled "Installation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 3: Offshore transfer systems," provides comprehensive guidelines for the design of liquefied natural gas (LNG) transfer systems. Its primary scope is geared toward ensuring safety and efficiency in offshore transfer facilities, as well as coastal transfer facilities that are exposed to various weather conditions. One of the significant strengths of this standard lies in its adaptability to various LNG transfer scenarios, accommodating both floating units and fixed units, which enhances its applicability to different maritime contexts. Additionally, the mention of normative Annex A conveys that while the standard offers a unified approach to designing LNG transfer systems, it also allows for necessary deviations. This flexibility is essential for addressing unique engineering challenges that may arise in specific environments or configurations. Furthermore, the reference to EN 1474-1 and EN 1474-2 reinforces the interconnectedness of these standards, ensuring that users are alerted to other relevant protocols that pertain to LNG transfer systems. By providing a clear framework for the design and testing of offshore transfer systems, EN 1474-3:2008 not only ensures compliance with safety regulations but also promotes best practices in the industry. Overall, the standard's relevance in today’s rapidly evolving energy sector cannot be overstated, as it provides critical guidelines that help maintain high operational standards in the transportation and transfer of liquefied natural gas. The specifications outlined help mitigate risks and enhance the safety of marine operations, thus serving as an essential resource for professionals engaged in LNG transfer system design and implementation.