ISO INTERNATIONAL STANDARD 19901-9 First edition 2019-07 Petroleum and natural gas industries Specific requirements for offshore structures - Part 9: Structural integrity management Industries du pétrole et du gaz naturel - Exigences spécifiques relativesauxstructuresenmer Partie 9: Gestion de l'intégrité structurelle Reference number IS0 19901-9:2019(E) osi @ IS0 2019 IS0 19901-9:2019(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: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 19901-9:2019(E) Contents Page Foreword ..vi Introduction. ..vii 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols. 5 Abbreviated terms ..5 6 SIM fundamentals. 6.1 General ..6 6.2 Limit states and performance levels .6 6.3 Fitness-for-service assessment .6 6.4 Management framework. 6.5 Design, .8 6.6 Topsides ..9 6.7 Continued service. .9 6.8 Structural integrity interfaces ..9 7 SIM process. ..9 8 SIM data. ..10 8.1 General. ..10 8.2 Missing data. 11 8.3 Data management .11 6 SIM evaluation .12 9.1 General. 12 9.2 Data evaluation .12 9.3 Hazards, hazardous events and degradation mechanisms. .12 9.4 Critical structure (CS) .12 9.5 Risk. .12 9.5.1 General. .12 9.5.2 Consequence. .13 9.5.3 Likelihood. .13 9.5.4 Risk presentation. .13 9.6 Demonstrating fitness-for-service ..13 9.7 Assessment. ..14 9.7.1 General .14 9.7.2 Assessment motive . ..14 9.7.3 Assessment initiators ..15 9.8 Mitigation measures. .15 9.8.1 General. .15 9.8.2 Consequence reduction ..16 9.8.3 Likelihood reduction. .16 10 SIM strategy .16 10.1 General. .. 16 10.2 Inspection strategy. ..17 10.2.1 General. ..17 10.2.2 Inspection motives. .18 10.2.3 Inspection type. .18 10.2.4 Inspection method. ..18 10.2.5 Inspection interval. .18 10.2.6 Inspection scope .20 10.2.7 Pre-selected inspection areas. 20 @ IS0 2019 - All rights reserved ii IS0 19901-9:2019(E) 10.3 Maintenance strategy 21 10.4 Monitoring strategy. 21 10.4.1 General. 21 10.4.2 Weight and centre of gravity (CoG) monitoring .22 10.4.3 Deck elevation monitoring 22 10.4.4 Natural frequency monitoring .22 10.4.5 Corrosion protection monitoring 22 10.4.6 Metocean monitoring. .22 10.5 Evacuation strategy 22 10.6 Marine site investigations 23 11 SIM Program .23 11.1 General 23 11.2 Inspection program 23 11.2.1 General .23 11.2.2 Specifications. 23 11.2.3 Inspection method .24 11.3 Maintenance program. 25 11.4 Monitoring program 25 12 Assessment. 26 12.1 General 26 12.2 Assessment information 26 12.3 Assessmentmethod 26 12.3.1 General. 26 12.3.2 Qualitative method 27 12.3.3 Semi-quantitative method .28 12.3.4 Quantitativemethods 29 12.3.5 Fatigue analysis. 31 12.4 Assessment model 31 12.4.1 General. .31 12.4.2 Tubular members 31 12.4.3 Connections.. 32 12.4.4 Conductors 32 12.4.5 Damage. 32 12.4.6 Repaired and strengthened elements 33 12.4.7 Foundation model. 33 12.4.8 Material strength 34 12.5 Assessment for gravity hazard. 34 12.5.1 General. 34 12.5.2 Design level method (DLM) 35 12.5.3 Ultimate strength method (USM) 35 12.6 Assessment for metocean hazard. 35 12.6.1 General. 35 12.6.2 Metocean criteria. 35 12.6.3 Crest elevation. 35 12.6.4 Metocean action combinations -Jacket. 36 12.6.5 MetoceanactioncombinationsDeck 36 12.6.6 Directionalityofmetoceanhazards 36 12.6.7 Design level method (DLM). 37 12.6.8 Linear-elastic redundancy method 37 12.6.9 Ultimate strength method (USM) 37 12.7 Assessmentforseismichazard