BSIS017420-7:2021 BSl Standards Publication Respiratory protective devices - Performance requirements Part 7: Special application marine, mining, welding, and abrasive blasting - Filtering RPD and supplied breathable gas RPD bsi. BS ISO 17420-7:2021 BRITISH STANDARD National foreword This British Standard is theUK implementation of IS017420-7:2021 The UK participation in its preparation was entrusted to Technical CommitteePH/4,Respiratoryprotection. A list of organizations represented on this committee can be obtained on requesttoits committeemanager. This publication does not purport to include all the necessary provisions ofa contract.Users areresponsiblefor its correctapplication. @The British Standards Institution 2021 Published by BSI Standards Limited 2021 ISBN 978 0580 98452 5 ICS13.340.30 Compliance with a British Standard cannot confer immunity from legalobligations. This British Standard was published under the authority of the Amendments/corrigendaissuedsincepublication Date Text affected BS ISO 17420-7:2021 INTERNATIONAL ISO STANDARD 17420-7 First edition 2021-02 Respiratory protective devices - Performance requirements - Part 7: Special application marine, mining, welding, and abrasive blasting - Filtering RPD and supplied breathable gas RPD Appareilsdeprotection respiratoire-Exigencesdeperformances Partie7:Applicationsparticulierespourenvironnementsmarins, exploitation miniere, soudage etprojectiond'abrasifs-APRalimentés engazrespirablesetAPRfiltrants Reference number IS0 17420-7:2021(E) ISO @ ISO 2021 BSISO17420-7:2021 IS017420-7:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 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 memberbody in the country ofthe requester. ISO copyright office CP 40i:Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122.749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved BSISO17420-7:2021 IS0 17420-7:2021(E) Contents Page Foreword Introduction ..vi 1 Scope. ..1 2 Normative references 3 Terms and definitions ..2 4 Classification overview ..3 4.1 General .3 4.2 Supplied breathable gas RPD ..3 4.3 FilteringRPD. 4 ..4 5 General requirements for RPD 6 Basic requirements for supplied breathable gas RPD or filtering RPD ..4 7 Special application for supplied breathable gas RPD for marine, mining, welding, abrasive blasting and filtering RPD formining, welding, abrasive blasting .4 7.1 Special application-Requirementmatrices. .4 7.1.1 General ..4 .5 7.1.2 SuppliedbreathablegasRPD .9 7.1.3 FilteringRPD 7.2 Requirements for special application RPDfor marine, mining,weldingand ..12 abrasiveblasting Thermal requirements. ..12 7.2.1 7.2.2 Resistancetoflameoffabricmaterials-SuppliedbreathablegasRPD ..13 7.2.3 Radiant heat .14 7.2.4 Resistance to hot particles (embers/sparks/ash) - Supplied breathable gas RPD and filtering RPD .14 7.2.5 Chemical resistanceofmaterials-Supplied breathablegas RPD ..15 7.2.6 Chemical resistance of visor only - Supplied breathable gas RPD and filteringRPD .16 7.2.7 Contact with hot and cold surfaces generated by the RPD 17 7.2.8 Avoidance of frictional sparks - Supplied breathable gas RPD and filtering RPD17 7.2.9 Mechanical Requirement 17 7.2.10 Requirements for audible warning devices - Supplied breathable gas RPD ..18 7.2.11 Practicalperformancerequirements-Supplied breathablegasRPDand filteringRPD ..19 7.2.12 Requirements for RPD used in explosive atmospheres -Supplied .21 breathable gas RPD and filtering RPD 7.2.13 Antistatic properties-Supplied breathable gas RPD and filtering RPD .21 7.3 Pre-conditioning of supplied breathable gas RPD and filtering RPD. 22 7.3.1 General. 22 7.3.2 Exposure to vibration and shock- Marine - Supplied breathable gas RPD .22 7.3.3 Exposure to vibration and