ISO INTERNATIONAL STANDARD 4589-4 First edition 2021-04 Plastics Determination of burning behaviour by oxygen index - Part 4: High gas velocity test Plastiques - Détermination du comportement au feu au moyen de I'indice d'oxygene - Partie 4: Essai a vitesse élevée de gaz Reference number IS0 4589-4:2021(E) ISO @IS02021 IS0 4589-4:2021(E) COPYRIGHT PROTECTED DOCUMENT IS0 2021 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 below or ISo's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved