ISO INTERNATIONAL STANDARD 29463-4 First edition 2011-10-15 High-efficiency filters and filter media for removing particles in air : Part 4: Test method for determining leakage of filter elements Scan method Filtres a haut rendement et filtres pour I'elimination des particules dans I'air- Partie 4:Methode d'essai pour determinerI'etancheite de I'élement filtrant (methode scan) Reference number ISO 29463-4:2011(E) @ISO 2011 ISO 29463-4:2011(E) COPYRIGHTPROTECTEDDOCUMENT @ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means. electronic or mechanical, including photocopying and microflm, without permission in writing from either IsO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland i @ ISO 2011 All rights reserved ISO 29463-4:2011(E) Contents Page Foreword. iv Introduction. 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Test filter 6 Test apparatus 6.1 Set-upof thetestapparatus 6.2 Test duct....... 6.3 Scanning assembly .. 6.4 Aerosol generation and measurement techniques.. 7 Test air 8 Procedure 10 8.1 General 10 8.2 10 8.3 Starting up theaerosol generator... 11 8.4 Preparingthetestfilter 1 8.5 Testing... 9 Test report. 10 Maintenanceand inspectionof thetestapparatus.. AnnexA (normative)Oilthread leak test ..... AnnexB (normative)Aerosol photometerfilter scantestmethod.. 16 AnnexC(normative)Determiningthetestparameters. AnnexD(informative)Exampleofanapplicationwithevaluation. .28 AnnexE(informative)LeaktestwithsolidPsLaerosol.. Annex F (informative) 0,3 μm to 0,5 μm particle efficiency leak test . Annex G (informative) Calculation of aerosol challenge .36 Bibliography... ii ISO 2011 All rights reserved ISO 29463-4:2011(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen non-governmental, in liaison with IsO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/lECDirectives,Part2 International Standard requires approval by at least 75 % of the member bodies casting a vote. rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO29463-4waspreparedbyTechnical CommitteeISO/TC142,Cleaningequipmentforairandothergases. ISO 29463 consists of the following parts, under the general title High-efficiency filters and filter media for removing particles in air. Part1:Classification,performance,testingandmarking 一 Part 2:Aerosol production,measuring equipment,particle-counting statistics Part 3: Testing flat sheet filter media Part 4: Test methodfor determining leakage of filter element-Scan method Part5:Testmethodforfilterelements iv @ ISO 2011 All rights reserved ISO 29463-4:2011(E) Introduction ISo 29463 (all parts) is derived from EN 1822 (all parts) with extensive changes to meet the requests from non-EU p-members. It contains requirements, fundamental principles of testing and the marking for high- efficiency particulate air filters with efficiencies from 95 % to 99,999 995 % that can be used for classifying filters in general or for specific use byagreement between users and suppliers. IsO 29463 (all parts) establishes a procedure for the determination of the efficiency of all filters on the basis of a particle counting method using a liquid (or alternatively a solid)test aerosol, and allows a standardized classification of these filters in terms of their efficiency, both local and overall efficiency, which actually covers standards lies in the technique used f