ISO INTERNATIONAL STANDARD 5657 Second edition 1997-12-15 Reaction to fire tests -- lgnitability of building products using a radiant heat source Essais de reaction au feu -- Allumabilite des produits de batiment avec une source de chaleur rayonnante This material is reproduced from ISO documents under International Organization for of these iso documents may be reproduced in any form, electronic retrieval system prior written consent ofISO (Case postale 56,1211 Geneva 20, Switzerland, Fax+41 227341079),IHS or theISo Licensor'smembers. OSI Reference number ISO5657:1997(E) Copyright Intermational Organization for Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO 5657:1997(E) Contents Page 1 Scope.. 1 2 Normative references .. 1 3 Definitions. 1 4 Principles of the test .. 2 5 Suitability of a product for testing... 3 6 Specimen construction and preparation. 3 7 Test apparatus.. 5 8 Test environment. 10 9 Setting-up procedure and requirements . 11 10 Calibration.. 11 11 Test procedure . 12 Annexes A Commentary on the text and guidance notes for operators ... 32 B Application and limitations of test ..... 36 c Higher heat flux capabilities. 38 D Interlaboratory trial on variability in time to sustained .Surface ignition....... 39 E Bibliography.. 41 1SO1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utlized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; s=central Printed in Switzerland Copyright International Organization for Standardization vithout license from IHS Not for Resale ISO5657:1997(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and 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. circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting avote. International Standard ISO 5657 was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommitte SC 1, Reaction to fire. This second edition cancels and replaces the first edition (ISO 5657:1986), which has been technically revised. Annexes A to E of this International Standard are for information only. i Copyrigtlntenatina organizatinfor Standardization d without license from IHS Not for Resale