BS EN BRITISH STANDARD 13648-1:2008 Cryogenic vessels - Safety devices for protection against excessive pressure Part l: Safety valves for cryogenic service ICS13.240;23.020.40;23.060.40 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS EN 13648-1:2008 National foreword This British Standard is the UK implementation of EN 13648-1:2008. It supersedes BS EN 13648-1:2002 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PVE/18, Cryogenic vessels. 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 responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard Amendments/corrigenda issued since publication was published under the authority ofthe Standards Policy and Strategy Date Comments Committee on 28 February 2009 @ BSI 2009 ISBN 978 0 580 58011 6 BS EN 13648-1:2008 EUROPEANSTANDARD EN 13648-1 NORME EUROPEENNE EUROPAISCHE NORM November 2008 ICS 23.020.40; 23.060.40 Supersedes EN 13648-1:2002 English Version Cryogenic vessels - Safety devices for protection against excessive pressure - Part 1: Safety valves for cryogenic service Récipients cryogeniques - Dispositifs de protection contre Kryo-Behalter - Sicherheitseinrichtungen gegen les surpressions-Partie1:Soupapes de suretepour Druckuberschreitung - Teil 1: Sicherheitsventile fur den service cryogenique Kryo-Betrieb This European Standard was approved by CEN on 5 October 2008. CEN members are bound to comply with the CEN/CENELEC Internal 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 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 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. France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHESKOMITEEFURNORMUNG Management Centre: rue de Stassart, 36B-1050 Brussels @2008CEN All rights of exploitation in any form and by any means reserved Ref.No.EN 13648-1:2008: E worldwideforCEN nationalMembers. BS EN 13648-1:2008 EN 13648-1:2008 (E) Contents page Foreword .3 1 Scope 4 2 Normative reference 4 3 Terms and definitions 4 4 Requirements 4.1 General.. 4.2 Design.... 4.2.1 Design temperature . 4.2.2 Drainage 4.2.3 Stemguiding 4.2.4 Inserts 4.2.5 Sublimatingcryogens 4.3 Materials ... 4.3.1 General. 4.3.2 Metallic materials .. 4.3.3 Corrosionresistance 4.3.4 Oxygen compatibility 4.3.5 Acetylene compatibility.. 4.3.6 Non-metallic materials ... .8 5 Testing.. 5.1 Production testing ... .8 5.2 Type testing for cryogenic service ... .8 5.2.1 5.2.2 Seat leakage test... 5.2.3 Cryogenic tests... .9 6 Determination of the certified derated coefficient of discharge (Kdr) .. 11 7 Cleanliness .. ..11 8 Marking ... Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EC Directive 97/23/EC (PED) .... Bibliography 14 2 BS EN 13648-1:2008 EN 13648-1:2008 (E) Foreword thesecretariatofwhichisheldbyAFNOR. by endorsement, at the latest by May 2009, and conflicting national standards shall be withdrawn at the latest by May 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of