ISO INTERNATIONAL STANDARD 19901-5 Third edition 2021-11 Petroleum and natural gas industries Specific requirements for offshore structures Part 5: Weight management Industries du pétrole et du gaz naturel - Exigences spécifiques relativesauxstructuresenmer Partie 5: Gestion despoids Reference number IS0 19901-5:2021(E) ISO @IS0 2021 IS0 19901-5:2021(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org PublishedinSwitzerland i @ IS0 2021 - All rights reserved IS0 19901-5:2021(E) Contents Page Foreword vi Introduction. ..viii 1 Scope. 1 2 Normative references .1 3 Terms and definitions. .2 4 Abbreviations. 6 5 Principles of weight management .7 5.1 General. .7 5.2 Weight management during project lifecycle phases 7 5.3 Weight management objectives. 7 5.3.1Objectives during conceptual design phase. .7 5.3.2 Objectives during FEED, detail engineering and construction phases .8 5.3.3Objectives during operations and decommissioning phases .8 5.4 Illustration of weight versus time 8 5.5 Loading conditions. .9 5.5.1 General 9 5.5.2 Typical loading conditions 9 6 Control Weights. .10 6.1 General.. 10 6.2 Purpose .11 6.3 Budget weights and NTE weights 11 6.3.1 Budget Weights. 11 6.3.2 Reserves... 11 6.3.3 NTE weights. .12 6.4 Loading conditions and parameters 12 6.5 Control weights during operations phase .12 7 Weight management during project execution phases .12 7.1 Conceptual design. 12 7.1.1 General 12 7.1.2 Predicted weight .13 7.1.3 Conceptual design weight 13 7.1.4 Upper bound weight constraint 13 7.1.5 Weight estimating. 14 7.1.6 Key documentation 14 7.1.7 Estimating principles 15 7.1.8 Deliverables 17 7.2 FEED. 18 7.2.1 General 18 7.2.2 Weight management plan. 18 7.2.3 Weight management procedure 19 7.2.4 Weight reporting. 19 7.2.5 Weight checking and verification 20 7.3 Detail engineering 21 7.3.1 General 21 7.3.2 Weight management plan. 21 7.3.3 Weight management procedure 21 7.3.4 Weight reporting. 21 7.3.5 Weight checking and verification 23 7.4 Construction 23 7.4.1 General 23 7.4.2 Weight database. 23 7.4.3 Weight reporting 24 IS02021-Allrightsreserved ii IS0 19901-5:2021(E) 7.4.4 Weighing of assemblies .24 7.5 Installation and HUC .24 7.6 Operations. .24 7.6.1 General ..24 7.6.2 Weight management procedure. .24 7.6.3 Weight database.. .25 7.6.4 Legacy weight databases .25 7.6.5 Laydown and storage drawings .25 7.6.6 Decommissioning ..26 8 Requirements for suppliers' weight data and weighing of tagged equipment and assembled discipline bulks .26 8.1 General .26 8.2 Submission of weight data 26 8.3 Weighing requirements. .27 8.3.1 Equipment. .27 8.3.2 Discipline bulks .27 8.4 Weighing procedure. .27 8.5 Weighing devices 28 8.5.1 Type of weighing device 28 8.5.2 Calibration of weighing devices 28 8.5.3 Maximum relative uncertainty for weighing devices .28 8.5.4 Capacity of weighing device .29 8.5.5 Spare weighing devices and ancillaries 29 8.6 Witnessing of weighing. .29 8.7 Scheduling of weighings .29 8.8 Environmental conditions during a weighing .29 8.9 Weighing operation. .29 8.10 Temporary items present during a weighing .30 8.11 Permanent items not installed during a weighing .30 8.12 Weighing certificate.. .30 9 Requirements for weighing of major assemblies .31 9.1 General .31 9.2 Weighing procedure 31 9.3 Weighing system.. .32 9.3.1 Load cells .32 9.3.2 Read-out devices .32 9.3.3 Uncertainty of weighing system. .32 9.3.4 Calibration of load cells .33 9.3.5 Capacity of weighing system components. .33 9.3.6 Spare load cells and ancillaries. .33 9.3.7 Hydraulic jacking system. .33 9.