ISO INTERNATIONAL STANDARD 22031 First edition 2021-01 Sampling and test method for cleanable filter media taken from filters of systems in operation Echantillonnage et meéthode d'essai pour medias filtrants décolmatables prélevés sur des filtres de systemes en exploitation Reference number IS0 22031:2021(E) Tso @ISO2021 IS0 22031:2021(E) COPYRIGHT PROTECTED DOCUMENT @ISO2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 beloworIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 -All rights reserved