BS ISO 17491-1:2012 BSl Standards Publication Protective clothing Test methods for clothing providing protection against chemicals Part 1: Determination of resistance to outward leakage of gases (internal pressure test) bsi. ..making excellence a habit. BSISO 17491-1:2012 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISo 17491-1:2012. The Uk participation in its preparation was entrusted to Technical Committee PH/3/3, Chemical, Biological, Radioactive and Nuclear Personal Protective Equipment. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @The British Standards Institution 2012.Published by BSI Standards Limited2012 ISBN 978058065183 0 ICS 13.340.10 Compliance with a British Standard cannot confer immunityfrom legal obligations. This British Standard was published under the authority of the Amendments issued since publication Date Text affected BS ISO 17491-1:2012 INTERNATIONAL ISO STANDARD 17491-1 First edition 2012-03-15 Protective clothing Test methods for clothing providing protection against chemicals - Part 1: Determination of resistance to outward leakage of gases (internal pressure test) Vetements deprotection-Methodes d'essai pourles vetements fournissantuneprotection contre les produits chimiques- Partie 1: Determination de la resistance aux fuites des gaz vers I'exterieur(essaidepression interne) Reference number ISO 17491-1:2012(E) TSO @ISO 2012 BS ISO 17491-1:2012 ISO17491-1:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 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 microfilm, 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 Casepostale 56 : CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2012 -All rights reserved BSISO 17491-1:2012 ISO 17491-1:2012(E) Foreword 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. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an 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. equipment, SubcommitteeSC13, Protectiveclothing. This edition of ISO 17491-1, together with ISO 17491-2, ISO 17491-3, ISO 17491-4 and ISO 17491-5, cancels and replacesIsO 17491:2002whichhas beentechnicallyrevised. Iso 17491 consists of the following parts, under the general title Protective clothing - Test methods for clothingprovidingprotectionagainstchemicals: Part1:Determinationofresistancetooutwardleakageofgases (internalpressuretest) -Part2:Determination of resistance to inward leakage of aerosols and gases (inward leakage test) Part 3: Determination of resistance to penetration by a jet of liquid (jet test) 一 Part 4:Determinationofresistancetopenetrationbya sprayof liquid (spraytest) Part 5: Determination of resistance to penetration by a spray of liquid (manikin spray test) @ ISO 2012 -All rights reserved ili BS ISO 17491-1:2012 ISO17491-1:2012(E) Introduction Chemical protective clothing is worn in conjunction with appropriate respiratory protective devices in order to isolate the body of the wearer from the environm