BS EN ISO BRITISH STANDARD 21049:2004 Incorporating Corrigendum No. 1 Pumps Shaft sealing systems for centrifugal and rotary pumps The European Standard EN IS0 21049:2004 has the status of a British Standard ICS 23.080; 23.100.60; 83.140.50 BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAW British Standards BS EN ISO 21049:2004 National foreword This British Standard is the official English language version of ENIS0 21049:2004,including Corrigendum February 2005.It is identical with ISO 21049:2004. The UK participation in its preparation was entrusted to Technical Committee PSE/17, Materials and equipment for petroleum, petrochemical and natural gas industries, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index", or by using the"Search" facility of the BSI Electronic Catalogue or of British Standards Online. 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 does not ofitself confer immunity from legal obligations. This British Standard was Summary of pages published undertheauthority This document comprises a front cover, an inside front cover, the EN ISO title of the Standards Policy and Strategy Committee on page, the EN ISO foreword page, the ISO title page, pages ii to vii, a blank page, 10February 2005 pages 1 to 195 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued sincepublication Amd. No. Date Comments 15677 31July2006 Notewas added to the ISO foreword BSI2006 Corrigendum No. 1 ISBN0580453707 EUROPEANSTANDARD ENISO.21049 NORMEEUROPEENNE EUROPAISCHENORM December 2004 ICS 23.100.60; 23.080; 83.140.50 Incorporating corrigendum February 2005 Englishversion Pumps - $ Shaftsealingsystemsforcentrifugalandrotarypumps (ISO 21049:2004) Pompes -Dispositifs d'étancheite de I'arbre pour pompes Pumpen-Wellendichtungssysteme fur Kreiselpumpen und centrifuges et rotatives (Is0 21049:2004) rotierende Verdrangerpumpen (IS021049:2004) ThisEuropeanStandardwasapprovedbyCENon21December2004 CEN membersareboundtocomplywiththeCEN/CENELEC Internal Regulations whichstipulatetheconditionsforgivingthis European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national This European Standard exists in three official versions (English, French, German). A version in any other language made by translation versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain,Sweden,Switzerlandand UnitedKingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEENDE NORMALISATION EUROPAISCHESKOMITEEFURNORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels @2004CEN All rights of exploitation in any form and by any means reserved Ref.No.ENISO21049:2004:E worldwideforCENnational Members. ENIS021049:2004 Foreword The text of ISO21049:2004has been preparedbyTechnical CommitteeISO/TC115"Pumps"of 21049:2004byTechnical CommitteeCEN/TC12"Materials,equipmentandoffshore structures This European Standard shall be given the status of a national standard,