ISO INTERNATIONAL STANDARD 16891 Firstedition 2016-01-15 Test methods for evaluating degradation of characteristics of cleanable filter media Methodes d'essais pour I'évaluation de la degradation des propriétés des medias filtrants décolmatables Reference number IS0 16891:2016(E) SO International Organization for Standardization ZHEJIANG INSTOFSTANDARDIZATION C15956617 @IS02016 vided by IHS under I itted without license from IHS IS0 16891:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS02016,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 01 11 Fax +41227490947 [email protected] www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZoISQ s.6 - All rights reserved I by IHS unde Not for Resale, 2016/3/29 02:53:1 etworking permitted without license from IHS IS0 16891:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions 4 Symbols and abbreviated terms ..4 5 Principle ..5 6 Test specimen, equipment and test procedure ..6 6.1 General ..6 6.2 Preparation of sheets for gas exposure. .7 6.2.1 Shape and size of tensile specimen .7 6.2.2 Samplesheetforexposure .7 6.2.3 Selection of sample sheet through air permeability measurement. .8 6.2.4 Filter media for exposure. ..8 6.3 Sample preparation .9 6.3.1 Exposure system .9 6.3.2 Heating system ..11 6.3.3 Test gas supply system .11 6.3.4 Gasanalyzer .11 6.3.5 Gas treatment device .12 6.4 Exposure conditions and procedures. 12 6.4.1 Exposure conditions. ..12 6.4.2 Exposure period and number of exposure ..12 6.4.3 Attachment of filter sample sheets in the sample case ..13 6.4.4 Implementation of the exposure. ..13 7 Tensile strength measurement of exposed specimen. ..14 7.1 Tensile test device .14 7.2 Preparation of a tensile test specimen .14 7.3 Method of tensile test .14 7.4 Characterization of the degradation ..15 8 Testreport ..16 Annex A (informative) Causes and results of degradation of fabrics ..17 Annex B (informative) Possible evaluation method for characteristic change of fabrics. ..18 Annex C (informative) Theoretical consideration of degradation mechanism. ..19 Annex D (informative) Determination of specimen size .22 Annex E (informative) Experimental setup forgas exposure. ..26 Annex F (informative) Service temperature of filter materials ..30 Annex G (informative) Examples of measured data of fabric at different circumstances ..31 Annex H (informative) Example of test report .37 Bibliography ..41 iii =ZHEJIANG INST OF STANDARDIZATION C15956617 d without license from IHS