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1、BS EN 1474-2:2008 ICS 75.200 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Installation and equipment for liquefied natural gas Design and testing of marine transfer systems Part 2: Design and testing of transfer hoses This British Standard was published und
2、er the authority of the Standards Policy and Strategy Committee on 31 March 2009 BSI 2009 ISBN 978 0 580 57977 6 Amendments/corrigenda issued since publication DateComments BS EN 1474-2:2008 National foreword This British Standard is the UK implementation of EN 1474-2:2008. The UK participation in i
3、ts preparation was entrusted to Technical Committee GSE/38, Installation and equipment for LNG. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are respon
4、sible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. 标准分享网 w w w .b z f x w .c o m 免费下载 BS EN 1474-2:2008 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1474-2 December 2008 ICS 75.200 English Version Installation and equipment fo
5、r liquefied natural gas - Design and testing of marine transfer systems - Part 2: Design and testing of transfer hoses Installations et quipements de gaz naturel liqufi - Conception et essais des systmes de transfert marins - Partie 2: Conception et essais des tuyaux de transfert Anlagen und Ausrstu
6、ng fr Flssigerdgas - Auslegung und Prfung von Schiffsbergabesystemen - Teil 2: Auslegung und Prfung von bergabeschluchen This 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
7、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 Management Centre or to any CEN member. This European Standard exists in three official versio
8、ns (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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
9、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 STAN
10、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1474-2:2008: E BS EN 1474-2:2008 EN 1474-2:2008 (E
11、) 2 Contents Page Foreword4 1 Scope 5 2 Normative references5 3 Terms, definitions and abbreviations5 4 Description of typical LNG transfer hose designs and accessories6 4.1 A LNG transfer hose system shall consist of the following6 4.1.1 A flexible hose assembly, comprising.6 4.1.2 Connection syste
12、m to LNGC6 4.1.3 Emergency release system.6 4.1.4 Handling7 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 hoses7 4.2.3 Composite hoses.9 5 Design features of the LNG tra
13、nsfer hoses and transfer hoses assemblies.10 5.1 General10 5.2 Application data required .10 5.3 Selection of hose length .10 5.4 Service life11 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
14、.11 5.9.1 General11 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 ship14 5.13 Hydraulic and electric control systems.14 6 Inspection and tests14 6.1 Foreword.14 6.2 Laborat
15、ory testing .15 6.3 Prototype hose testing15 6.4 Factory acceptance tests18 6.4.1 General18 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 General18 7.2 Material selection.18 7.3 Marking.19 7.4 Manufacturing19 7.5 Documentat
16、ion related to an approved certification process: .19 标准分享网 w w w .b z f x w .c o m 免费下载 BS EN 1474-2:2008 EN 1474-2:2008 (E) 3 8 Documentation.19 8.1 For information a purchasing guidelines table is given in Annex A19 8.2 As-built documentation.19 8.3 Operation manual20 Annex A (informative) Purcha
17、sing guidelines table21 Annex B (normative) Prototype and factory acceptance tests for LNG hose assemblies27 Annex C (informative) Surge pressure considerations for LNG hoses.29 Bibliography31 BS EN 1474-2:2008 EN 1474-2:2008 (E) 4 Foreword This document (EN 1474-2:2008) has been prepared by Technic
18、al 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 standar
19、ds 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
20、 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 o
21、f 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 t
22、his 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 Un
23、ited Kingdom. 标准分享网 w w w .b z f x w .c o m 免费下载 BS EN 1474-2:2008 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 o
24、r 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 w
25、ill 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, definition
26、s 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 w
27、ith 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 doc
28、ument (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 t
29、ransfer 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 a
30、ssemblies 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
31、 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 describ
32、ed 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. BS EN 1474-2:2008 EN 1474-2:2008 (E) 6 3.1 owner (or designated agent) company or group of companies for whose use the hose assemb
33、ly 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 f
34、lexible 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 i
35、ce); 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 i
36、s 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
37、with valves and ERC (Emergency Release Coupler). (A description of emergency release system is given in EN 1474-1 and EN 1474-3). 标准分享网 w w w .b z f x w .c o m 免费下载 BS EN 1474-2:2008 EN 1474-2:2008 (E) 7 4.1.4 Handling Hose shall include necessary fittings for safe handling, coupling and uncoupling
38、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 1474-1:200
39、8, 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
40、 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 helica
41、l 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 cal
42、led 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 arm
43、ours 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
44、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. BS EN 1474-2:2008 EN 1474-2:2008 (E) 8 The hose assembly construction shall ensure that all materials are used within
45、 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 laye
46、r 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 su
47、per insulation inside the evacuated annular gap. 标准分享网 w w w .b z f x w .c o m 免费下载 BS EN 1474-2:2008 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 Sketc
48、h 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
49、 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 prov