EN 1474-2:2008

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
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

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

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

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

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

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 1474-3:2008, 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 o
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