ISO INTERNATIONAL STANDARD 10418 Third edition 2019-05 Petroleum and natural gas industries Offshore production installations Process safety systems Industries du petrole et du gaz naturel - Plates-formes de production en mer-Systemes de sécurité des proceédés Reference number IS0 10418:2019(E) @ IS0 2019 IS0 10418:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 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 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: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 10418:2019(E) Contents Page Foreword .iv Introduction 1 Scope. 1 2 Normative references 1 3 Terms, definitions and abbreviated terms 1 3.1 Terms and definitions 3.2 Abbreviated terms . 5 4 Symbols and identification for protection devices 5 4.1 Objectives. 5 4.2 Functional requirements 6 5 Safety analysis concepts 6 5.1 Objectives. 6 5.2 Generalfunctionalreguirements 6 5.3 Functional requirements for analysis using structured review techniques 7 6 Process safety system design .8 6.1 Objectives. .8 6.2 Functional requirements .8 Annex A (informative) Support systems .12 Annex B (informative) Toxic gases .15 Bibliography .17 @ IS0 2019 - All rights reserved ii