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CEI NORME IEC INTERNATIONALE 60534-8-1 INTERNATIONAL STANDARD Deuxieme édition Second edition 2005-09 Vannes de régulation des processus industriels - Partie 8-1: Considérations sur le bruit- Mesure en laboratoire du bruit cree par un debit aérodynamique a travers une vanne de regulation Industrial-process control valves - Part 8-1: Noiseconsiderations- Laboratory measurement of noise generated by aerodynamic flow through control valves IEC Numero de reférence Reference number CEI/IEC 60534-8-1:2005 Copyright Intemational Electrotechnical Commission license from IHS Not for Resale Publication numbering Numerotationdespublications Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are sont numerotees a partir de 60000. Ainsi, la CEI 34-1 issued with a designation in the 60000 series. For devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1. Editions consolidees Consolidated editions Les versions consolidées de certaines publications de la The IEC is now publishing consolidated versions of its CEl incorporant les amendements sont disponibles. Par publications. For example, edition numbers 1.0, 1.1 exemple, les numeros d'edition 1.0, 1.1 et 1.2 indiquent and 1.2 refer, respectively, to the base publication, respectivement la publication de base, la publication de the base publication incorporating amendment 1 and base incorporant I'amendement 1, et la publication de the base publication incorporating amendments 1 base incorporant les amendements 1 et 2. and 2. Informations supplementaires Further informationonIECpublications surles publications de la CEl Le contenu technique des publications de la CEl est The technical content of IEC publications is kept constamment revu par la CEl afin qu'il reflete I'etat under constant review by the IEC, thus ensuring that actuel de la technique. Des renseignements relatifs a the content reflects current technology. Information relating to this publication, including its validity, is cette publication, y compris sa validite, sont dispo- nibles dans le Catalogue des publications de la CEI available in the IEC Catalogue of publications (voir ci-dessous) en plus des nouvelles editions, (see below) in addition to new editions, amendments amendements et corrigenda. Des informations sur les and corrigenda. Information on the subjects under sujets a P'etude et'avancement des travaux entrepris consideration and work in progress undertaken by the technical committee which has prepared par le comite d'etudes qui a elabore cette publication, this ainsi que la liste des publications parues, sont publication, as wellas the listof publications issued is also available from the following: egalement disponibles par Il'intermediaire de: Site web de la CEI (www.iec.ch) IEC Web Site (www.iec.ch) Catalogue des publications de la CEl Catalogue of IEC publications Le catalogue en ligne sur le site web de la CEI The on-line catalogue on the IEC web site (www.iec.ch/searchpub) vous permet de faire des (www.iec.ch/searchpub) enables you to search by a recherches en utilisant de nombreux criteres, variety of criteria including text searches, comprenant des recherches textuelles, par comite technical committees and date of publication. On- d'etudes ou date de publication, Des informations en line information is also available on recently ligne sont egalement disponibles sur les nouvelles issued publications, withdrawn and replaced publications, les publications remplacees ou retirees, publications, as well as corrigenda ainsi que sur les corrigenda. IEC Just Published IEC Just Published Ce resume des dernieres publications parues This summary of recently issued publications (www.iec.ch/online news/justpub) est aussi dispo- (www.iec.ch/online news/justpub) is also available nible par courrier electronique. Veuillez prendre by email. Please contact the Customer Service contact avec le Service client (voir ci-dessous) Centre (see below) for further in

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