Installation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 2: Design and testing of transfer hoses

This European Standard gives general guidelines for the design, material selection, qualification, certification, and testing details for Liquefied Natural Gas (LNG) transfer hoses for offshore transfer or on coastal weather-exposed facilities for aerial, floating and submerged configurations or a combination of these. Whilst this European Standard is applicable to all LNG hoses, it is acknowledged that there may be further specific requirements for floating and submerged hoses. The transfer hoses will be designed to be part of transfer systems (it means that they will be fitted with ERS, QCDC, handling systems, hydraulic and electric components etc.) To avoid unnecessary repetition, crossreferences to EN 1474-1 and EN 1474-3, are made for all compatible items, and for references, definitions and  abbreviations. Where additional references, definitions and abbreviations are required specifically for LNG hoses, they are listed in this European Standard. Transfer hoses need to be durable when operating in the marine environment and to be flexible with a minimum bending radius compatible with handling and the operating requirements of the transfer system.

Anlagen und Ausrüstung für Flüssigerdgas - Auslegung und Prüfung von Schiffsübergabesystemen - Teil 2: Auslegung und Prüfung von Übergabeschläuchen

Dieser Teil der EN 1474 enthält generelle Hinweise für Auslegung, Werkstoffauswahl, Eignung, Zertifizierung und Prüfdetails für Flüssigerdgas (LNG) – Schlauchleitungen für die Übergabe auf See oder bei Anlagen, die Küstenwetter ausgesetzt sind.
Zur Vermeidung von unnötigen Wiederholungen wird für alle vergleichbaren Gegenstände, für Definitionen und Abkürzungen auf EN 1474 1, Auslegung und Prüfung von Ladearmen verwiesen. Sofern zusätzliche Verweise, Definitionen und Abkürzungen für LNG-Schlauchleitungen benötigt werden, sind sie in diesem Teil der Norm aufgeführt.
Für Einzelheiten von besonderen Gestaltungen von LNG Übergabesystemen sollte auf EN 1474 3 verwiesen werden.
Schlauchleitungen, die für die Übergabe von LNG verwendet werden, haben normalerweise einen großen Durchmesser: typisch sind Werte von DN 250 (10") bis über DN 400 (16") und größer, mit Arbeitsdrücken in einem Bereich von , 10 bar bis 20 bar, um die Mindestdurchflussrate von der Einrichtung von 10 000 m3/h mit einer praktikablen Anzahl von Schlauchleitungen für die LNG-Übergabe und die Dampfrückführung zu erreichen.
Schlauchleitungen zur Übergabe müssen bei Betrieb in Meeresumgebung dauerhaft sein und sie müssen biegsam sein bei einem minimalen Biegeradius, der den Anforderungen an Handhabung und Betrieb des
Übergabesystems entspricht

Installations et équipements de gaz naturel liquéfié - Conception et essais des systemes de transfert marins - Partie 2: Conception et essais des tuyaux de transfert

Cette norme européenne fournit des lignes directrices générales relatives à la conception, au choix des
matériaux, à la qualification, à la certification et aux détails des essais concernant les tuyaux flexibles de
transfert de gaz naturel liquéfié (GNL) destinés au transfert offshore ou aux installations côtières exposées
aux intempéries. Elle s’applique aux configurations de tuyaux flexibles de transfert aériens, flottants,
submergés ou une combinaison de ces configurations. Alors que cette norme européenne est applicable à
tous les tuyaux flexibles de GNL, il est reconnu qu’il peut y avoir des exigences spécifiques complémentaires
pour les tuyaux flexibles flottants et submergés.
Les tuyaux flexibles de transfert seront conçus pour faire partie des systèmes de transfert (cela signifie qu’ils
seront équipés d’ERS, de QCDC, de systèmes de manutention, de composants hydrauliques et électriques,
etc.)
Pour éviter les répétitions inutiles, la référence à l’EN 1474-1 et à l’EN 1474-3 est valable pour tous les
éléments compatibles, ainsi que pour les références, les définitions et les abréviations. Si des références, des
définitions et des abréviations supplémentaires sont spécifiquement nécessaires pour les tuyaux flexibles de
GNL, elles sont énumérées dans la présente norme.
Les tuyaux flexibles de transfert ont besoin d’être résistants lorsqu’ils sont utilisés en environnement marin et
flexibles avec un rayon de courbure minimal compatible avec la manipulation et les exigences opérationnelles
du système de transfert.

Napeljave in oprema za utekočinjeni zemeljski plin - Načrtovanje in preskušanje obalnih pretakališč - 2. del: Načrtovanje in preskušanje cevi za pretakanje

General Information

Status
Withdrawn
Publication Date
28-Jan-2009
Withdrawal Date
01-Nov-2020
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
02-Nov-2020
Due Date
25-Nov-2020
Completion Date
02-Nov-2020

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SUHWDNDQMHAnlagen und Ausrüstung für Flüssigerdgas - Auslegung und Prüfung von Schiffsübergabesystemen - Teil 2: Auslegung und Prüfung von ÜbergabeschläuchenInstallations et équipements de gaz naturel liquéfié - Conception et essais des systemes de transfert marins - Partie 2: Conception et essais des tuyaux de transfertInstallation and equipment for liquefied natural gas - Design and testing of marine transfer systems - Part 2: Design and testing of transfer hoses75.200Petroleum products and natural gas handling equipmentICS:Ta slovenski standard je istoveten z:EN 1474-2:2008SIST EN 1474-2:2009en,fr,de01-marec-2009SIST EN 1474-2:2009SLOVENSKI

STANDARD
SIST EN 1474-2:2009

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1474-2December 2008ICS 75.200 English VersionInstallation and equipment for liquefied natural gas - Design andtesting of marine transfer systems - Part 2: Design and testing oftransfer hosesInstallations et équipements de gaz naturel liquéfié -Conception et essais des systèmes de transfert marins -Partie 2: Conception et essais des tuyaux de transfertAnlagen und Ausrüstung für Flüssigerdgas - Auslegung undPrüfung von Schiffsübergabesystemen - Teil 2: Auslegungund Prüfung von ÜbergabeschläuchenThis 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 1474-2:2008: ESIST EN 1474-2:2009

EN 1474-2:2008 (E) 2 Contents Page Foreword..............................................................................................................................................................4 1 Scope......................................................................................................................................................5 2 Normative references............................................................................................................................5 3 Terms, definitions and abbreviations..................................................................................................5 4 Description of typical LNG transfer hose designs and accessories................................................6 4.1 A LNG transfer hose system shall consist of the following..............................................................6 4.1.1 A flexible hose assembly, comprising.................................................................................................6 4.1.2 Connection system to LNGC................................................................................................................6 4.1.3 Emergency release system...................................................................................................................6 4.1.4 Handling..................................................................................................................................................7 4.1.5 Power systems.......................................................................................................................................7 4.1.6 Leak detection, monitoring and alarm systems.................................................................................7 4.2 Typical construction of LNG transfer hoses.......................................................................................7 4.2.1 Main hose categories............................................................................................................................7 4.2.2 Corrugated metal hoses........................................................................................................................7 4.2.3 Composite hoses...................................................................................................................................9 5 Design features of the LNG transfer hoses and transfer hoses assemblies.................................10 5.1 General..................................................................................................................................................10 5.2 Application data required...................................................................................................................10 5.3 Selection of hose length.....................................................................................................................10 5.4 Service life............................................................................................................................................11 5.5 Selection of hose size.........................................................................................................................11 5.6 Selection of buoyancy.........................................................................................................................11 5.7 Selection of insulation........................................................................................................................11 5.8 Basic design parameters....................................................................................................................11 5.9 Component details – End fitting.........................................................................................................11 5.9.1 General..................................................................................................................................................11 5.9.2 Termination..........................................................................................................................................12 5.9.3 Connector.............................................................................................................................................13 5.9.4 Bending stiffener/restrictor (optional)...............................................................................................13 5.10 Hose handling / lifting device.............................................................................................................13 5.11 Safety systems.....................................................................................................................................13 5.12 Connection to the ship........................................................................................................................14 5.13 Hydraulic and electric control systems.............................................................................................14 6 Inspection and tests............................................................................................................................14 6.1 Foreword...............................................................................................................................................14 6.2 Laboratory testing...............................................................................................................................15 6.3 Prototype hose testing........................................................................................................................15 6.4 Factory acceptance tests....................................................................................................................18 6.4.1 General..................................................................................................................................................18 6.4.2 All hoses...............................................................................................................................................18 6.4.3 FAT tests on one hose per order.......................................................................................................18 6.5 System testing.....................................................................................................................................18 7 Quality assurance and control...........................................................................................................18 7.1 General..................................................................................................................................................18 7.2 Material selection.................................................................................................................................18 7.3 Marking.................................................................................................................................................19 7.4 Manufacturing......................................................................................................................................19 7.5 Documentation related to an approved certification process:.......................................................19 SIST EN 1474-2:2009

EN 1474-2:2008 (E) 3 8 Documentation.....................................................................................................................................19 8.1 For information a purchasing guidelines table is given in Annex A..............................................19 8.2 As-built documentation.......................................................................................................................19 8.3 Operation manual................................................................................................................................20 Annex A (informative)

Purchasing guidelines table......................................................................................21 Annex B (normative)

Prototype and factory acceptance tests for LNG hose assemblies........................27 Annex C (informative)

Surge pressure considerations for LNG hoses.......................................................29 Bibliography......................................................................................................................................................31 SIST EN 1474-2:2009

EN 1474-2:2008 (E) 4 Foreword This document (EN 1474-2:2008) has been prepared by 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 June 2009, and conflicting national standards shall be withdrawn at the latest by June 2009. 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 European Standard consists of 3 parts:  EN 1474-1: Installation and equipment for liquefied natural gas — Design and testing of marine transfer systems — Part 1: Design and testing of transfer arms  EN 1474-2: Installation and equipment for liquefied natural gas — Design and testing of marine transfer systems — Part 2: Design and testing of transfer hoses  EN 1474-3, Installation and equipment for liquefied natural gas — Design and testing of marine transfer systems — Part 3: Offshore transfer systems 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, 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.

SIST EN 1474-2:2009

EN 1474-2:2008 (E) 5 1 Scope This European Standard gives general guidelines for the design, material selection, qualification, certification, and testing details for Liquefied Natural Gas (LNG) transfer hoses for offshore transfer or on coastal weather-exposed facilities for aerial, floating and submerged configurations or a combination of these. Whilst this European Standard is applicable to all LNG hoses, it is acknowledged that there may be further specific requirements for floating and submerged hoses. The transfer hoses will be designed to be part of transfer systems (it means that they will be fitted with ERS, QCDC, handling systems, hydraulic and electric components etc.) To avoid unnecessary repetition, cross-references to EN 1474-1 and EN 1474-3, are made for all compatible items, and for references, definitions and abbreviations. Where additional references, definitions and abbreviations are required specifically for LNG hoses, they are listed in this European Standard. Transfer hoses need to be durable when operating in the marine environment and to be flexible with a minimum bending radius compatible with handling and the operating requirements of the transfer system. 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 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 EN 1474-3:2008, Installation and equipment for liquefied natural gas — Design and testing of marine transfer systems — Part 3: Offshore transfer systems EN ISO 1746, Rubber or plastic hoses and tubings — Bending tests (ISO 1746:1998, including technical corrigendum 1:1999) EN ISO 7369, Pipework — Metal hoses and hoses assemblies — Vocabulary (ISO 7369:2004) EN ISO 8330, Rubber and plastic hoses and hoses assemblies — Vocabulary (ISO 8330:2007) EN ISO 9000, Quality management systems — Fundamentals and vocabulary (ISO 9000:2005) EN ISO 9001, Quality management system — Requirements (ISO 9001:2000) 3 Terms, definitions and abbreviations For the purposes of this document, the terms and definitions given in EN ISO 7369 and EN ISO 8330 apply. NOTE 1 Exception to the above: for this document, the bending radii are measured from the centre line. NOTE 2 For the purpose of this document hose assembly means the hose complete with end fittings, hose handling and lifting devices (pad eyes, collars, …), as described in 4.1.1. NOTE 3 For the purpose of this document, [MAWP] is defined in Clause 6 and Annex C. NOTE 4 For the purpose of this document, [D] and [ND] are defined in Clause 6. SIST EN 1474-2:2009

EN 1474-2:2008 (E) 6 3.1 owner (or designated agent) company or group of companies for whose use the hose assembly as defined in 4.1.1 is provided 3.2 vendor company selling the hose assembly to the owner, and in charge of completing the hose assembly as defined in 4.1.1 4 Description of typical LNG transfer hose designs and accessories 4.1 A LNG transfer hose assembly shall consist of the following 4.1.1 A flexible hose assembly, comprising  flexible hose, refer to 4.2;  associated end terminations and connectors;  permanent identification marks;  hose handling device(s) (padeye or lifting lugs, lifting collar, …), and if required:  leak detection system;  insulation system (to minimize build up of external ice);  intermediate leak barrier(s);  bending stiffeners or restrictors;  buoyancy. 4.1.2 Connection system to LNGC  Hose extremity connector flanges shall permit the mounting of a QCDC or a spool piece or permit direct connection to LNGC or LNG terminal or another hose assembly. (A description of QCDC is given in EN 1474-1, for transfer system reference is made to EN 1474-3).  Hubs, or other connectors if equivalent or superior to flanges, may be used if agreed between owner and vendor. 4.1.3 Emergency release system  Hose extremity connector shall permit the mounting of an emergency release system with valves and ERC (Emergency Release Coupler). (A description of emergency release system is given in EN 1474-1 and EN 1474-3). SIST EN 1474-2:2009

EN 1474-2:2008 (E) 7 4.1.4 Handling  Hose shall include necessary fittings for safe handling, coupling and uncoupling either from the LNGC or the onshore or offshore LNG terminal system as required by the system design (refer to EN 1474-3). 4.1.5 Power systems  Hose may support (e.g. piggy back mounted) hydraulic or pneumatic hoses, electric cables for the powering of the ERS and QCDC systems (refer to EN 1474-1:2008, Clause 6). 4.1.6 Leak detection, monitoring and alarm systems  If required by the owner the hose shall incorporate leak detection system e.g. gaseous nitrogen bleeding in the annular space (see 5.11). 4.2 Typical construction of LNG transfer hoses 4.2.1 Main hose categories At present LNG transfer hoses are categorized in two types according to their method of construction:  those based on a reinforced corrugated metal hose construction, hereafter called corrugated metal hose;  those based on a construction in which polymeric films and fabrics are entrapped between a pair of close wound helical wires, hereafter called composite hose;  as the technology develops, other types of hose may become available and are also to be considered covered by this European Standard. 4.2.2 Corrugated metal hoses 4.2.2.1 Hose  Inner layer The inner layer is made of stainless steel corrugations (sometimes called bellows). This ensures the inner leak-proofness of the structure, as well as sustaining the inner radial pressure.  Armour layers (if required) These armour layers support the axial loading whilst providing an initial thermal insulation.  Spiral layer (if required) This layer ensures that the armours remain in place, as well as providing some thermal insulation.  Thermal insulation layers This layer (or series of layers) ensures that the inner temperature is conserved whilst preventing any build-up of ice on the exterior of the hose.  Intermediate and outer leak-proof layers The intermediate sheath gives the hose a double annulus, thus permitting the detection of any leak of LNG as soon as it may occur. The external sheath prevents any ingress of water from the exterior. SIST EN 1474-2:2009

EN 1474-2:2008 (E) 8 The hose assembly construction shall ensure that all materials are used within their individual range of temperature.

Key 1 leakproof layer 2 insulation 3 leakproof layer 4 insulation 5 supporting layer 6 armouring 7 leakproof layer 8 corrugated inner pipe

Figure 1 — Typical hose assembly – reinforced corrugated metal hose family

Depending on the design, the outer leak proof layer can be a corrugated stainless steel pipe similar to the inner pipe. In this case the annular gap between inner and outer pipe may be evacuated. The pressure supervision of this annular gap results in a leak detection of inner and outer pipe. The thermal insulation may be maintained by layers of super insulation inside the evacuated annular gap. SIST EN 1474-2:2009

EN 1474-2:2008 (E) 9

Key 1 pumping port 2 armouring 3 corrugated outer pipe 4 corrugated inner pipe 5 super insulation vacuum 6 vacuum supervision leak detection Figure 2 — Typical hose assembly – Sketch of a LNG flexible hose with vacuum insulation option

4.2.2.2 End fitting assembly The end fitting assembly is made of stainless steel, and ensures 2 primary functions. The flexible termination incorporates the different layers of the flexible and ensures the integrity of each layer at its end. The construction is designed to allow the immediate detection of any LNG leak into the inner annulus. The end connector is connected to the associated piping at each end of the flexible. This will typically be a standard ANSI flange. 4.2.3 Composite hoses A composite hose consists of un-bonded, multiple polymeric film and fabric layers trapped between two wire helices which give the hose its shape, one being internal and one being external. Broadly, the film layers provide a fluid-tight barrier to the conveyed product and the fabric layers provide the mechanical strength of the hose. In sequence, starting from the bore, the construction is as follows: a) inner metallic wire helix applied at a pre-determined close pitch; b) polymeric fabric layers forming the bore material; c) pack of many polymeric film layers. The complete film pack achieves a tubular form and provides the fluid tight barrier to the conveyed product; SIST EN 1474-2:2009

EN 1474-2:2008 (E) 10 d) pack of many polymeric fabric layers which reinforce the hose; e) outer metallic wire helix applied at half a pitch offset to the inner wire under tension. This forms the hose into the required convoluted structure. The number and arrangement of the layers in steps c) and d) is specific to the hose size and application. The polymeric film and fabric materials are selected to be compatible with the conveyed product and the extremes of operating temperature.

Key 1 inner wire 2 film 3 fabric 4 outer wire Figure 3 — Typical hose – composite hose family 5 Design features of the LNG transfer hoses and transfer hoses assemblies 5.1 General The hose forms part of an overall system for the transfer of LNG – for the requirements which will dictate the exact design of the hose (e.g. static load and dynamic movements, …) refer to EN 1474-3. The design process and required information is outlined below. 5.2 Application data required The application data required should be determined by the owner and/or the system vendor according to the guidelines given in Annex A. 5.3 Selection of hose length The overall hose length will be dictated by the system design and shall be sufficient to meet both storage and operational conditions including motion envelopes as defined in EN 1474-3 (see also Annex A). Depending on the length, system design and type, and other factors such as shipping requirements, the hose shall be either supplied as a continuous length or as a string of discrete sections. The hose length used in the system shall be such that the motion envelopes as defined in EN 1474-3 are met (see also Annex A). SIST EN 1474-2:2009

EN 1474-2:2008 (E) 11 Hose length shall take into account the elongation of the hose under pressure and its own weight. This elongation shall be consistent with the transfer system design. 5.4 Service life The required service life shall be agreed between the owner and the vendor. The calculation of the hose service life will take into account the cumulative effects of the number and amplitude of flexure, tensile, pressure and temperature cycles in operation, environmental ageing and the consequences of emergency disconnections and internal pressure surge in service. The safety ratio between service life, fatigue life and fatigue test duration shall be agreed by the owner and the vendor and shall be documented. 5.5 Selection of hose size The owner shall specify flow rate, maximum allowable working pressure, temperature, composition of product and the maximum allowable head loss. The number of hoses to be used shall be either predefined by the system or can be tailored to suit size limits and flow rate requirements. The vendor shall confirm the Maximum Allowable Working Pressure (MAWP) of the hose assembly to allow the owner to size pressure relief devices etc. 5.6 Selection of buoyancy The transfer system shall be such that the hose is either floating, aerial, or the owner will specify the degree of buoyancy if it is required (this will also include submersion requirements). If buoyancy is required, it shall be agreed between the owner and the vendor. 5.7 Selection of insulation If required the hose shall have sufficient insulation to minimize build-up of ice on the exterior of the hose itself and to limit heat leak. 5.8 Basic design parameters The MBP (Minimum Burst Pressure) ratio to the MAWP is given in Clause 6. The FAT (Factory Acceptance Test) pressure is given in Clause 6. The maximum flow velocity in the hose shall be agreed by the owner and the vendor. Maximum allowable applied twist shall be specified by the vendor. The hose shall be designed ensuring the compatibility of each component (layer) of the hose with its function (e.g. LNG and NG service and testing values). 5.9 Component details – End fitting 5.9.1 General The end fittings of any hose comprise of two main parts:  termination; SIST EN 1474-2:2009

EN 1474-2:2008 (E) 12  connector. Illustration of an end fitting (typical, may vary depending on the hose design):

Key 1 handling collar 2 identification collar 3 bending stiffener (optional) 4 connector 5 termination 6 end fitting 7 hose

Figure 4 — Typical end fitting assembly – composite hose family

5.9.2 Termination The termination shall ensure the following functions:  mechanical attachment of all component layers of the hose which resist against internal pressure, traction and torsion;  provide a leak-proof seal against the transported fluid and/or gas;  provide a leak-proof seal against ingress of humidity or water from the outer environment. The end fitting shall comply with the system fatigue criteria. In the case of a burst test for proof purposes, the end fittings shall not separate from the hose. SIST EN 1474-2:2009

EN 1474-2:2008 (E) 13 5.9.3 Connector The connector shall either be machined into the end termination or welded to it in accordance with a qualified procedure. The type of connector shall be specified by the owner and / or the system requirements. 5.9.4 Bending stiffener/restrictor (optional) This is an optional item, either embedded into or mounted onto the hose at either one or both terminations, when required. It has the function of providing a smooth transition of bending forces, if existing, from the end fitting to the hose structure, and provides extra resistance to over bending. The inclusion of a bend stiffener is at the vendors discretion following review of the operational conditions. 5.10 Hose handling / lifting device Additional items such as the hose handling device (pad eyes or collar etc.), QCDC and ERS shall be designed as part of the particular system and in accordance with EN 1474-1 and EN 1474-3. Specific hose handling instructions shall be issued as part of the system. Appropriate hose handling instructions shall be supplied with each order to allow correct handling during transport and at others times prior to inclusion in the system. A hose handling/lifting device shall be designed and proof tested to allow for safe handling of the complete hose. When requested and upon mutual agreement between the vendor and owner, it can be designed to handle other equipment which could be attached to either end of the hose. Appropriate arrangements are to be provided to securely keep the hoses in stored position when not in service or whilst being transported. 5.11 Safety systems Leak detection (optional): Hoses with annulus: Gas detection if fitted is to be provided as a warning of leakage of the hose allowing appropriate action to be taken. The system shall conform to one of the following:  leak detection of only the inner pipe. In case of a break of the inner pipe, the supervision system gives alarm signal to the terminal, but NG escapes to the environment;  leak detection only at the end fitting to provide detection of seal failure;  leak detection of only the inner pipe. In case of a break of the inner pipe, the supervision system gives alarm signal to the terminal. For small leaks the escaping gas is exhausted from the annular gap. The annular gap is not able to withstand the MAWP of the hose;  leak detection of the inner pipe and an outer pipe if it is provided. In case of a leak in the outer pipe, the supervision gives a certain alarm to the terminal. In case of a leak in the inner pipe, the supervision gives alarm to the terminal and the escaping gas is covered by the outer pipe. The outer pipe is able to withstand MAWP of hose. Hoses without annulus: Not all hoses have an annulus running along their entire length. In these cases a leak detection may be provided in the vicinity of the transition. SIST EN 1474-2:2009

EN 1474-2:2008 (E) 14 Fire safety requirements: Fire safety requirements, if specified shall be mutually agreed between owner and vendor, see also

EN 1474-3:2008, 7.6. Electrical safety requirements: Electrical continuity requirements shall be mutually agreed between the owner and the vendor, see also EN 1474-3:2008, 7.6. 5.12 Connection to the ship Connection to the ship by the manifold will be achieved by handling the LNG hose assemblies by the means of their dedicated connection on the hose system, see also EN 1474-3:2008, Clause 8. 5.13 Hydraulic and electric control systems Any requirements for hydraulic and electric control system affecting the hose shall be specified by the owner (refer to EN 1474-1:2008, Clause 7). 6 Inspection and tests 6.1 General All qualification test results

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