Installation and equipment for liquefied natural gas - Design and testing of loadinglunloading arms

Transcription

1 Edition: ldentical (IDT) with EN 1474:1997 Supersedes 1 ICS Installation and equipment for liquefied natural gas - Design and testing of loadinglunloading arms Anlagen und Ausrüstung für Flüssigerdgas - Auslegung und Prüfung von Ladearmen Installations et equipements relatifs au gaz nature1 liquefie - Conception et essais des bras de chargemenüdechargement The European Standard EN 1474 has the status of an Austrian Standard. The ÖNORM EN 1474 consists of this national Cover Page the official English version of EN 1474:1997. Continuation EN 1474 Pages 1 to 48 Publisher and printing: Österreichisches Normungsinstitut, 1020 Wien Technical Committee 043 Copyright O ON All rights reserved; Gas-fired appliances and gas technology No part of this publication may be reproduced or utilized in any form or by any means - electronic, mechanical, photocopying or any other data carriers without prior permission from ON! Sale and distribution of national and foreign standards and technical regulations via Österreichisches Normungsinstitut (ON), Heinestraße 38, A-1020 Wien Tel.: (+43 1) , Fax: (+43 1) , salesaon-norm.at, PricelCategory 23 Internet:

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3 EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM EN 1474 July 1997 ICS Descriptors: LNG, installations, design, loading arms. English version Installations and equipment for liquefied natural gas Design and testing of loading/unloading arms Installations et equipements relatifs au gaz nature1 liquefie - Conception et essais des bras de chargementl dechargement Anlagen und Ausrüstung für Flüssig-' erdgas - Auslegung und Prüfung von Ladearmen This European Standard was approved by CEN on CEN members are bound to comply with the CENICENELEC Interna1 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 Central Secretariat or to any CEN member. The European Standards exist 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comite Europeen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, Brussels O CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. E I I

4 Page 2 Foreword This European Standard 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 January 1998 and conflicting national standards shall be withdrawn at the latest by January 1998 According to the CENEENELEC Interna1 Regulations, the national standards organizations of the following countfies are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Gemiany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzeiiand and the United Kingdom.

5 Page 3 I Scope This European Standard specifies the design, material selection, minimum safety requirements and inspection and testing procedures for liquefied natural gas (LNG) loading and unloading arms. It also Covers the minimum requirements for safe LNG transfer between ship and shore. Although the requirements for remote controi power systems are covered, the standard does not include all the details for the design and fabrication of standard parts and fittings associated with loadinglunloading arms. The content of this standard is supplernentary to local or national standards and regulations and is additional to the requirements of pren Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendrnent or revision. For undated references the latest edition of the publication referred to applies. EN Approval testing of welders - Fusion welding - Part 1 : Steels EN Specification and qualification of welding procedures for metallic materials - Part 1 : General des for fusion welding EN Specification and approval of welding procedures for metallic materials - Part 2 : Welding procedure specification for arc welding EN Specification and approval of welding procedures for metallic materials - Part 3 : Welding procedure tests for the arc welding of steels pren EN 875 EN 910 pren 1435 pren 1473 EN Non destructive testing - Penetrant testing - Part 1 : General principles Destructive tests on welds in metallic materials - Impact tests - Test specimen location, notch orientation and examination Destructive tests on welds in metallic materials - Bend tests Installation and equipment for liquefied natural gas - General characteristics of liquefied natural gas Non destructive examination of welds - Radiographic examination of welded joints Installation and equipment for liquefied natural gas - Design of onshore installations Stainless steels - Part 2 : Technical delivery conditions for sheetlplate and strip for general purposes

6 Page 4 Stainless steels - Part 3 : Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes Electrical apparatus for potentially explosive atmospheres - General requirernents Electrical apparatus for potentially explosive atmospheres - Oil immersion '<ol' Electrical apparatus for potentially explosive atmospheres - Pressurized apparatus "p" Electrical apparatus for potentially explosive atmospheres - Powder filling 'T Electrical apparatus for potentially explosive atmospheres - Flameproof enclosure "d" EN Electrical apparatus for potentially explosive atmospheres - safety "e" EN Electrical apparatus for potentially explosive atmospheres - safety "i" lncreased lntrinsic ISO Testing of valves - Fire type-testing requirements 3 Definitions and abbreviations For the purposes of this European Standard the following definitions apply : 3.1 shiplshore transfer facilities : A jetty including all the shiplshore interface equipment for receiving or exporting LNG. 3.2 apex swivel : The articulated, fluid-carrying joint located between the inboard and outboard arms. 3.3 arm : The articulated piping, including the base riser, that is fixed on the jetty and its supporting structure plus all its accessories. 3.4 arm, inboard : The fluid-carrying pipe and/or structural members contained between the apex swivel and the trunnion swivel. 3.5 arm, outboard : The fluid-carrying pipe contained between the apex swivel and the triple swivel assembly.

7 Page attitude : The various modes of use and/or location of the arm (i.e. manoeuvring, stored, connected, washing, hydrostatic test, and maintenance). The arm may take several positions for each attitude. 3.7 bank of arms : All the arms on the Same jetty. 3.8 base riser : See riser (see 3.48). 3.9 brinelling : Any permanent indentation in the swivel raceways caused by excessive loading of the swivel balls. NOTE : For swivel test purposes, brinelling is said to occur when the width of the indentation is equal to or greater than eight percent of the ball diameter cantilever length : The distance from the ship's manifold flange face (inctuding spool pieces), to the fint permanent manifold support point on the ship's cargo line. 3.1 I cavitation : The fonnation of low pressure zones at the inner radius of elbows. Cavitation is caused by the collapse of bubbles which are formed at excessively high flow rates. The collapse releases energy, sometimes with an audible sound and vibration centreline of arm group : The line equidistant between the two outside arms of those loading arms in simultaneous service. It is used as the line for spotting the centreline of the manifold group to be serviced by the loading arm group centreline of manifold group : The line equidistant between the two outside manifolds (noules) of the group of manifolds to be connected to the loading arms clash : Any contact : - between adjacent loading arms while both arms are operating or one arm is operating and the other arm is stored ; - between adjacent sections of the same arm (e.g. the triple swivel and outboard an) ; - between the arm and any loading platform equiprnent contact angle (a) : The angle between the plane of the swivel joint balls and the centre of contact at the ball raceway interface CPMS : Constant position monitoring system.