ISO 19901-5:2021
(Main)Petroleum and natural gas industries — Specific requirements for offshore structures — Part 5: Weight management
Petroleum and natural gas industries — Specific requirements for offshore structures — Part 5: Weight management
This document specifies requirements for managing and controlling the weight and centre of gravity (CoG) of offshore facilities by means of mass management during all lifecycle phases including; conceptual design, front end engineering design (FEED), detail engineering, construction and operations. These can be new facilities (greenfield) or modifications to existing facilities (brownfield). Weight management is necessary throughout operations, decommissioning and removal to facilitate structural integrity management (SIM). The provisions of this document are applicable to fixed and floating facilities of all types. Weight management only includes items with static mass. Snow and ice loads are excluded as they are not considered to be part of the facility. Dynamic loads are addressed in ISO 19904-1, ISO 19901-6 and ISO 19901-7. This document specifies: a) requirements for managing and controlling weights and CoGs of assemblies and entire facilities; b) requirements for managing weight and CoG interfaces; c) standardized terminology for weight and CoG estimating and reporting; d) requirements for determining not-to-exceed (NTE) weights and budget weights; e) requirements for weighing and determination of weight and centre of gravity (CoG) of tagged equipment, assemblies, modules and facilities; This document can be used: f) as a basis for costing, scheduling or determining suitable construction method(s) or location(s) and installation strategy; g) as a basis for planning, evaluating and preparing a weight management plan and reporting system; h) as a contract reference; i) as a means of refining the structural analysis or model.
Industries du pétrole et du gaz naturel — Exigences spécifiques relatives aux structures en mer — Partie 5: Gestion des poids
Le présent document spécifie les exigences relatives à la gestion et au contrôle du poids et du centre de gravité (CdG) des installations en mer par la gestion des masses pendant toutes les phases du cycle de vie, notamment l'étude conceptuelle, l’étude avancée de détail (FEED), l'ingénierie de détail, la construction et les opérations. Ces structures peuvent être des installations nouvelles ou des modifications d’installations existantes (zones de réhabilitation). La gestion des poids est nécessaire tout au long des opérations, mais également au cours des phases de démantèlement et d'enlèvement, afin de faciliter la gestion de l'intégrité structurelle (GIS). Les dispositions du présent document s'appliquent aux installations fixes et flottantes de tous types. La gestion des poids ne concerne que les éléments ayant une masse statique. Les charges associées à la neige et à la glace sont exclues, car elles ne sont pas considérées comme faisant partie de l’installation. Les charges dynamiques sont traitées dans l'ISO 19904-1, ISO 19901-6 et l'ISO 19901-7. Le présent document spécifie: a) les exigences applicables à la gestion et au contrôle des poids et des CdG des ensembles et des installations entières; b) les exigences applicables aux interfaces de la gestion des poids et du CdG; c) une terminologie normalisée pour l'estimation et l'établissement de rapports relatifs aux poids et aux CdG; d) les exigences applicables à la détermination des poids à ne pas dépasser (NTE) et des poids prévisionnels; e) les exigences applicables à la pesée et à la détermination du poids et du centre de gravité (CdG) des équipements identifiés, des ensembles, des modules et des installations. Le présent document peut être utilisé: f) comme base d'établissement des coûts, de planning ou de détermination de méthode de construction ou de localisation(s) appropriés et de stratégie d'installation; g) comme base de planification, d'évaluation et de préparation d'un plan de gestion des poids et d'un système de suivi; h) comme référence de contrat; i) comme moyen d'amélioration de l'analyse structurelle ou du modèle de calcul.
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INTERNATIONAL ISO
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
relatives aux structures en mer —
Partie 5: Gestion des poids
Reference number
ISO 19901-5:2021(E)
© ISO 2021
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ISO 19901-5:2021(E)
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© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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ISO 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
5.3.1 Objectives during conceptual design phase . 7
5.3.2 Objectives during FEED, detail engineering and construction phases . 8
5.3.3 Objectives 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
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ISO 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
9.3.8 Levelness of the assembly during the weighing .34
9.4 Preparations prior to the weighing . .34
9.4.1 Notification and witnessing of weighings .34
9.4.2 Environmental conditions during a weighing.34
9.4.3 Weighing prediction report .34
9.4.4 Temporary items during the weighing . 35
9.5 Weighing operation . 35
9.5.1 Number of results recorded . 35
9.5.2 Readings of load cells and level criteria.36
9.5.3 Consistency of results .36
9.5.4 CoG calculations .36
9.5.5 Weighing report .36
9.5.6 Weighing certificate . 37
Annex A (informative) Commentary .38
Annex B (informative) Weighing certificates .42
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ISO 19901-5:2021(E)
Annex C (informative) Example control weight summary .46
Annex D (informative) Variable weight .47
Annex E (informative) Example decision-making RAPID matrix .51
Annex F (informative) Weighing result uncertainty .53
Annex G (informative) Weight database structure .56
Annex H (informative) Weight management guidelines for concrete structures .57
Annex I (informative) Coordinate systems .60
Annex J (informative) Weight allowances and reserves .62
Annex K (informative) Weight management competencies.64
Bibliography .65
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ISO 19901-5:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and 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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 7, Offshore
structures, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 12, Materials, equipment and offshore structures for petroleum, petrochemical and
natural gas industries, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 19901-5:2016), which has been
technically revised.
The main changes are as follows:
— part title changed to "Weight Management";
— document restructured and columnization removed;
— weight control classes removed;
— requirements for weight management for all project phases implemented;
— annexes deleted or relocated to body of document:
— previous Annex A “Weight data sheets – tagged equipment” combined with previous Annex B
“Weighing certificates” to create new joined into a new Annex B “Weighing certificates”;
— previous Annex C “Weight and load budget (WLB) formats and levels” replaced with new
Annex C “Control weights”;
— deleted previous Annex D “Major elements of the weight displacement”;
— information in previous Annex E “Supplier weighing procedure” relocated to Clause 8;
— deleted previous Annex F “Guidelines for displacement measurement of floating facilities”;
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ISO 19901-5:2021(E)
— information in previous Annex G “Requirements for weight control during operations” relocated
to Clause 7;
— information in previous Annex H “Requirements for topsides weight estimation — New builds/
green field” relocated to Clause 7;
— information in previous Annex I “Executive summary description” relocated to Clause 7;
— replaced previous Annex J “Weighing result uncertainty” with Annex F “Weighing result
uncertainty”;
— previous Annex K “Weight control database structure” replaced with new Annex G “Weight
database structure”.
— Annexes added:
— Annex A “Commentary”;
— Annex D “Variable weight”;
— Annex E “Example decision-making RAPID matrix”;
— Annex H “Weight of concrete structures”;
— Annex I “Coordinate systems”;
— Annex J “Weight allowances and reserves”;
— Annex K “Weight management competencies”.
A list of all parts in the ISO 19901 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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ISO 19901-5:2021(E)
Introduction
The International Standards on offshore structures prepared by TC 67/SC 7 (ISO 19900, the ISO 19901
series, ISO 19902, ISO 19903, ISO 19904-1, the ISO 19905 series, and ISO 19906) constitute a common
basis covering those aspects that address design requirements and assessments of all offshore facilities
used by the petroleum and natural gas industries worldwide. Through their application the intention
is to achieve reliability levels appropriate for manned and unmanned offshore facilities, whatever the
type of structure and the nature of the materials used.
It is important to recognize that structural integrity is an overall concept comprising models for
describing actions, structural analyses, design rules, safety elements, workmanship, quality control
procedures and national requirements, all of which are mutually dependent. The modification of one
aspect of design in isolation can disturb the balance of reliability inherent in the overall concept or
structural system. The implications involved in modifications, therefore, need to be considered in
relation to the overall reliability of all offshore structural systems.
The International Standards on offshore structures prepared by TC 67/SC 7 are intended to provide a
wide latitude in the choice of structural configurations, materials and techniques without hindering
innovation. Sound engineering judgement is therefore necessary in the use of these International
Standards.
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INTERNATIONAL STANDARD ISO 19901-5:2021(E)
Petroleum and natural gas industries — Specific
requirements for offshore structures —
Part 5:
Weight management
1 Scope
This document specifies requirements for managing and controlling the weight and centre of gravity
(CoG) of offshore facilities by means of mass management during all lifecycle phases including;
conceptual design, front end engineering design (FEED), detail engineering, construction and
operations. These can be new facilities (greenfield) or modifications to existing facilities (brownfield).
Weight management is necessary throughout operations, decommissioning and removal to facilitate
structural integrity management (SIM). The provisions of this document are applicable to fixed and
floating facilities of all types.
Weight management only includes items with static mass.
Snow and ice loads are excluded as they are not considered to be part of the facility. Dynamic loads are
addressed in ISO 19904-1, ISO 19901-6 and ISO 19901-7.
This document specifies:
a) requirements for managing and c
...
NORME ISO
INTERNATIONALE 19901-5
Troisième édition
2021-11
Industries du pétrole et du gaz
naturel — Exigences spécifiques
relatives aux structures en mer —
Partie 5:
Gestion des poids
Petroleum and natural gas industries — Specific requirements for
offshore structures —
Part 5: Weight management
Numéro de référence
ISO 19901-5:2021(F)
© ISO 2021
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ISO 19901-5:2021(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
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Publié en Suisse
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ISO 19901-5:2021(F)
Sommaire Page
Avant-propos . vi
Introduction .viii
1 Domaine d'application .1
2 Références normatives .2
3 Termes et définitions . 2
4 Abréviations . 6
5 Principes de la gestion des poids. 7
5.1 Généralités . 7
5.2 Gestion des poids au cours des phases du cycle de vie du projet . 7
5.3 Objectifs de gestion des poids . 8
5.3.1 Objectifs durant la phase d'étude conceptuelle . 8
5.3.2 Objectifs durant les phases d’étude avancée de détail, d'ingénierie de détail
et de construction . 8
5.3.3 Objectifs durant les phases d'opération et de démantèlement . 9
5.4 Illustration du poids en fonction du temps . 9
5.5 Conditions de chargement . 10
5.5.1 Généralités . 10
5.5.2 Conditions de chargement typiques. 10
6 Poids de contrôle .12
6.1 Généralités .12
6.2 Objectif. 12
6.3 Poids prévisionnels et poids NTE .12
6.3.1 Poids prévisionnels .12
6.3.2 Réserves . 13
6.3.3 Poids NTE . 13
6.4 Conditions et paramètres de chargement . 13
6.5 Poids de contrôle pendant la phase d'opération . 14
7 Gestion des poids au cours des phases d'exécution du projet .14
7.1 Étude conceptuelle . 14
7.1.1 Généralités . 14
7.1.2 Poids prédit . 14
7.1.3 Poids en phase d'étude conceptuelle . 15
7.1.4 Limite supérieure de poids . 15
7.1.5 Estimation des poids . .15
7.1.6 Documents de base. 16
7.1.7 Principes d'estimation. 17
7.1.8 Livrables . 19
7.2 Étude avancée de détail . 20
7.2.1 Généralités .20
7.2.2 Plan de gestion des poids . 20
7.2.3 Procédure de gestion des poids . 21
7.2.4 Rapport de poids . 21
7.2.5 Contrôle et vérification des poids . 22
7.3 Ingénierie de détail . 22
7.3.1 Généralités .22
7.3.2 Plan de gestion des poids . 23
7.3.3 Procédure de gestion des poids . 23
7.3.4 Rapport de poids .23
7.3.5 Contrôle et vérification des poids . 25
7.4 Construction . 25
7.4.1 Généralités . 25
7.4.2 Base de données des poids . 26
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ISO 19901-5:2021(F)
7.4.3 Rapport de poids .26
7.4.4 Pesée des ensembles .26
7.5 Installation, raccordement et mise en service . 26
7.6 Opérations . 27
7.6.1 Généralités . 27
7.6.2 Procédure de gestion des poids . 27
7.6.3 Base de données des poids . 27
7.6.4 Bases de données de poids patrimoniales .28
7.6.5 Plans de dépose et de stockage.28
7.6.6 Démantèlement . .28
8 Exigences relatives aux données de poids du fournisseur et à la pesée des
équipements identifiés et du matériel courant assemblé par discipline .29
8.1 Généralités .29
8.2 Fourniture des données de poids .29
8.3 Exigences relatives à la pesée . 30
8.3.1 Équipement .30
8.3.2 Matériel courant par discipline .30
8.4 Procédure de pesée .30
8.5 Dispositifs de pesée . 31
8.5.1 Type de dispositif de pesée . 31
8.5.2 Étalonnage des dispositifs de pesée . 31
8.5.3 Incertitude relative maximale des dispositifs de pesée . 31
8.5.4 Capacité du dispositif de pesée . 31
8.5.5 Dispositifs de pesée de rechange et auxiliaires . 31
8.6 Témoignage de la pesée . 32
8.7 Planification des pesées . 32
8.8 Conditions environnementales au cours d'une pesée . 32
8.9 Opération de pesée . 32
8.10 Éléments temporaires présents au cours d'une pesée . 33
8.11 Éléments permanents non installés pendant la pesée . 33
8.12 Certificat de pesée . 33
9 Exigences relatives à la pesée des principaux ensembles .34
9.1 Généralités .34
9.2 Procédure de pesée .34
9.3 Système de pesée . 35
9.3.1 Cellules de pesée . 35
9.3.2 Dispositifs d’affichage . 35
9.3.3 Incertitude du système de pesée . 35
9.3.4 Étalonnage des cellules de pesée .36
9.3.5 Capacité des composants du système de pesée .36
9.3.6 Cellules de pesée de rechange et auxiliaires .36
9.3.7 Système de levage par vérins hydrauliques .36
9.3.8 Planéité de l'ensemble pendant la pesée . 37
9.4 Préparations avant la pesée . 37
9.4.1 Notification et témoignage de la pesée . . 37
9.4.2 Conditions environnementales au cours d'une pesée . 37
9.4.3 Rapport de prédiction de pesée . 37
9.4.4 Éléments temporaires pendant la pesée .38
9.5 Opération de pesée .38
9.5.1 Nombre de résultats enregistrés .38
9.5.2 Lecture des cellules de pesée et critères de niveau .39
9.5.3 Cohérence des résultats .39
9.5.4 Calculs du centre de gravité . 39
9.5.5 Rapport de pesée. 39
9.5.6 Certificat de pesée .40
Annexe A (informative) Commentaires .41
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ISO 19901-5:2021(F)
Annexe B (informative) Certificats de pesée .46
Annexe C (informative) Exemple de bilan de contrôle des poids .50
Annexe D (informative) Poids variable .51
Annexe E (informative) Exemple de matrice de décision RAPID .55
Annexe F (informative) Incertitude des résultats de pesée .57
Annexe G (informative) Structure de la base de données des poids .60
Annexe H (informative) Lignes directrices pour la gestion des poids des structures en béton .62
Annexe I (informative) Systèmes de coordonnées.65
Annexe J (informative) Tolérance de poids et réserves .67
Annexe K (informative) Compétences en matière de gestion des poids .70
Bibliographie .71
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ISO 19901-5:2021(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 67, Matériel, équipement et structures
en mer pour les industries pétrolière, pétrochimique et du gaz naturel, sous-comité SC 7, Structures en mer,
en collaboration avec le comité technique CEN/TC 12, Matériel, équipement et structures en mer pour les
industries du pétrole, de la pétrochimie et du gaz naturel, du Comité européen de normalisation (CEN)
conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Cette troisième édition annule et remplace la deuxième édition (ISO 19901-5:2016), qui a fait l'objet
d'une révision technique.
Les principales modifications sont les suivantes:
— utilisation du nouveau titre de la partie: «Gestion des poids»;
— restructuration du document et suppression de la présentation en colonnes;
— suppression des classes de contrôle des poids;
— introduction d'exigences de gestion des poids pour toutes les phases du projet;
— suppression ou déplacement des annexes dans le corps du document:
— fusion de la précédente Annexe A «Feuilles de données de poids — Équipement identifié» et de
l'ancienne Annexe B «Certificats de pesage» pour créer une nouvelle Annexe B «Certificats de
pesée»;
— remplacement de la précédente Annexe C «Formats et niveaux de bilan des poids et des charges»
par la nouvelle Annexe C «Exemple de bilan de contrôle des poids»;
— suppression de la précédente Annexe D «Principaux éléments du déplacement de poids»;
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ISO 19901-5:2021(F)
— relocalisation des informations de la précédente Annexe E «Procédure de pesage du fournisseur»
à l'Article 8;
— suppression de la précédente Annexe F «Lignes directrices pour la mesure du déplacement
d’installations flottantes»;
— relocalisation des informations de la précédente Annexe G «Exigences relatives au contrôle du
poids pendant les opérations» à l'Article 7;
— relocalisation des informations de la précédente Annexe H «Exigences relatives à l'estimation
de poids des superstructures — Constructions neuves/installations nouvelles» à l’Article 7;
— relocalisation des informations de la précédente Annexe I «Description d'un résumé» à
l'Article 7;
— remplacement de la précédente Annexe J «Incertitude des résultats de pesage» par l'Annexe F
«Incertitude des résultats de pesée»;
— remplacement de la précédente Annexe K «Structure de la base de données de contrôle des
poids» par l'Annexe G «Structure de la base de données des poids»;
— ajout de nouvelles annexes:
— Annexe A «Commentaires»;
— Annexe D «Poids variable»;
— Annexe E «Exemple de matrice de décision RAPID»;
— Annexe H, «Lignes directrices pour la gestion des poids des structures en béton»;
— Annexe I, «Systèmes de coordonnées»;
— Annexe J «Tolérance de poids et réserves»;
— Annexe K «Compétences en matière de gestion des poids».
Une liste de toutes les parties de la série ISO 19901 se trouve sur le site web de l'ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
vii
© ISO 2021 – Tous droits réservés
---------------------- Page: 7 ----------------------
ISO 19901-5:2021(F)
Introduction
Les Normes internationales pour les structures en mer élaborées par le TC 67/SC 7 (l'ISO 19900, la série
ISO 19901, l'ISO 19902, l'ISO 19903, l'ISO 19904-1, la série ISO 19905, et l'ISO 19906) constituent une
base commune qui couvre les aspects traitant des exigences de conception et des évaluations de toutes
les installations en mer utilisées par les industries du pétrole et du gaz naturel dans le monde. Leur
mise en œuvre a pour finalité d'atteindre des niveaux de fiabilité appropriés pour les installations en
mer habitées ou non, quels que soient le type de structure et la nature des matériaux utilisés.
Il est important de savoir que l'intégrité structurale est un concept global qui comprend la modélisation
des actions, les analyses structurales, les règles de conception, les aspects liés à la sécurité, la qualité
de l'exécution, ainsi que les procédures de contrôle de la qualité et les réglementations nationales,
ces divers éléments étant interdépendants. La modification d'un aspect isolé des bases conceptuelles
peut avoir, en termes de fiabilité, une incidence sur la conception globale ou sur les performances de la
structure dans son ensemble. Par conséquent, les effets de toute modification apportée à une structure
en mer doivent être considérés par rapport à la fiabilité de l'ensemble du système.
Les Normes internationales pour les structures en mer préparées par le TC 67/SC 7 sont élaborées
pour permettre un choix étendu de configurations structurelles, de matériaux et de techniques sans
entraver l'innovation. Une solide capacité de jugement en termes d'ingénierie est donc nécessaire pour
l'utilisation de ces Normes internationales.
viii
© ISO 2021 – Tous droits réservés
---------------------- Page: 8 ----------------------
NORME INTERNATIONALE ISO 19901-5:2021(F)
Industries du pétrole et du gaz naturel — Exigences
spécifiques relatives aux structures en mer —
Partie 5:
Gestion des poids
1 Domaine d'application
Le présent document spécifie les exigences relatives à la gestion et au contrôle du poids et du centre
de gravité (CdG) des in
...
ISO/TC 67/SC 7
Date: 2021-11-16
ISO/FDIS 19901--5:2021(EF)
SecretariatSecrétariat: NEN
Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 5: Weight management
Industries du pétrole et du gaz naturel — Exigences spécifiques relatives aux
structures en mer — Partie 5: Gestion des poids
Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 5: Weight management
---------------------- Page: 1 ----------------------
ISO/FDIS 19901-5:2021(E)
DOCUMENT PROTÉGÉ PAR COPYRIGHT PROTECTED DOCUMENT
All rights reserved. Unless otherwise specified, 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 2021
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en
œuvre, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme
que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage
sur l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation
peuvent être adressées à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du
demandeur.
ISO copyright office
CP 401 • Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, SwitzerlandGenève
Tel. Tél.: + 41 22 749 01 11
Fax: + 41 22 749 09 47
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
Error! Reference source not found.
ii
---------------------- Page: 2 ----------------------
ISO/FDIS 19901-5:2021(E)
ContentsSommaire Page
Foreword . vii
Introduction . ix
1 Scope .1
2 Normative references .2
3 Terms and definitions .2
4 Abbreviations .7
5 Principles of weight management .7
5.1 General .7
5.2 Weight management during project lifecycle phases .7
5.3 Weight management objectives .8
5.3.1 Objectives during conceptual design phase .8
5.3.2 Objectives during FEED, detail engineering and construction phases .9
5.3.3 Objectives during operations and decommissioning phases .9
5.4 Illustration of weight versus time .9
5.5 Loading conditions . 10
5.5.1 General . 10
5.5.2 Typical loading conditions . 10
6 Control Weights . 12
6.1 General . 12
6.2 Purpose . 12
6.3 Budget weights and NTE weights . 12
6.3.1 Budget Weights . 12
6.3.2 Reserves . 13
6.3.3 NTE weights . 13
6.4 Loading conditions and parameters . 13
6.5 Control weights during operations phase . 14
7 Weight management during project execution phases . 14
7.1 Conceptual design. 14
7.1.1 General . 14
7.1.2 Predicted weight . 14
7.1.3 Conceptual design weight . 15
7.1.4 Upper bound weight constraint . 15
7.1.5 Weight estimating . 15
7.1.6 Key documentation . 16
7.1.7 Estimating principles . 17
7.1.8 Deliverables . 19
7.2 FEED . 20
7.2.1 General . 20
7.2.2 Weight management plan . 20
7.2.3 Weight management procedure . 21
7.2.4 Weight reporting. 22
7.2.5 Weight checking and verification . 22
7.3 Detail engineering . 23
7.3.1 General . 23
7.3.2 Weight management plan . 23
7.3.3 Weight management procedure . 24
Error! Reference source not found.
iii
---------------------- Page: 3 ----------------------
ISO/FDIS 19901-5:2021(E)
7.3.4 Weight reporting . 24
7.3.5 Weight checking and verification . 25
7.4 Construction . 26
7.4.1 General . 26
7.4.2 Weight database . 26
7.4.3 Weight reporting . 26
7.4.4 Weighing of assemblies . 26
7.5 Installation and HUC . 26
7.6 Operations . 27
7.6.1 General . 27
7.6.2 Weight management procedure . 27
7.6.3 Weight database . 27
7.6.4 Legacy weight databases . 28
7.6.5 Laydown and storage drawings . 28
7.6.6 Decommissioning . 29
8 Requirements for suppliers’ weight data and weighing of tagged equipment and
assembled discipline bulks . 29
8.1 General . 29
8.2 Submission of weight data . 29
8.3 Weighing requirements . 30
8.3.1 Equipment . 30
8.3.2 Discipline bulks . 30
8.4 Weighing procedure . 30
8.5 Weighing devices . 31
8.5.1 Type of weighing device . 31
8.5.2 Calibration of weighing devices . 31
8.5.3 Maximum relative uncertainty for weighing devices . 32
8.5.4 Capacity of weighing device . 32
8.5.5 Spare weighing devices and ancillaries . 32
8.6 Witnessing of weighing . 32
8.7 Scheduling of weighings . 32
8.8 Environmental conditions during a weighing . 32
8.9 Weighing operation . 32
8.10 Temporary items present during a weighing . 33
8.11 Permanent items not installed during a weighing . 33
8.12 Weighing certificate . 34
9 Requirements for weighing of major assemblies . 34
9.1 General . 34
9.2 Weighing procedure . 34
9.3 Weighing system . 36
9.3.1 Load cells . 36
9.3.2 Read-out devices . 36
9.3.3 Uncertainty of weighing system . 36
9.3.4 Calibration of load cells . 36
9.3.5 Capacity of weighing system components . 37
9.3.6 Spare load cells and ancillaries . 37
9.3.7 Hydraulic jacking system . 37
9.3.8 Levelness of the assembly during the weighing . 37
9.4 Preparations prior to the weighing . 38
9.4.1 Notification and witnessing of weighings . 38
9.4.2 Environmental conditions during a weighing . 38
9.4.3 Weighing prediction report . 38
Error! Reference source not found.
iv
---------------------- Page: 4 ----------------------
ISO/FDIS 19901-5:2021(E)
9.4.4 Temporary items during the weighing . 39
9.5 Weighing operation . 39
9.5.1 Number of results recorded . 39
9.5.2 Readings of load cells and level criteria . 40
9.5.3 Consistency of results. 40
9.5.4 CoG calculations . 40
9.5.5 Weighing report . 40
9.5.6 Weighing certificate . 41
Annex A (informative) Commentary . 42
A.1 Commentary to 7.1 Conceptual design . 42
A.2 Commentary to 7.1.7 Estimating principles . 43
A.3 Commentary to 7.1.7.2 Analogue method. 44
A.4 Commentary to 7.1.7.3 MEL norms method . 44
A.5 Commentary to A.7.1.7.4 Area and/or volumetric norms method . 44
A.6 Commentary to A.7.2.1 General . 44
A.7 Commentary to A.7.6.4 Legacy Weight Databases . 45
Annex B (informative) Weighing certificates . 47
B.1 Example tagged equipment and discipline bulks weighing certificate . 47
B.2 Example assembly weighing certificate . 49
Annex C (informative) Example control weight summary. 51
Annex D (informative) Variable weight . 52
D.1 Example variable weights and fill-levels. 52
D.2 Example laydown and storage drawing . 54
D.3 Example drilling load combinations . 54
Annex E (informative) Example decision-making RAPID matrix . 56
Annex F (informative) Weighing result uncertainty . 58
Annex G (informative) Weight database structure . 61
Annex H (informative) Weight management guidelines for concrete structures . 63
H.1 General . 63
H.2 Concrete density . 63
H.3 Concrete volume . 64
H.4 Concrete weight and CoG . 64
H.5 Concrete reinforcement . 64
H.6 Weight reporting. 65
Annex I (informative) Coordinate systems. 66
Annex J (informative) Weight allowances and reserves . 68
J.1 Weight allowances . 68
J.1.1 Introduction to weight allowances . 68
J.1.2 Uncertainty allowances for norm-based and analogue based weight estimates . 68
J.1.3 Net weight allowances for WTO/ datasheet-based weight estimates . 68
J.2 Example reserves . 69
J.3 Operating to dry ratios . 70
Annex K (informative) Weight management competencies . 71
Bibliography . 72
Error! Reference source not found.
v
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ISO/FDIS 19901-5:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and 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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
ThisAvant-propos . vi
Introduction . viii
1 Domaine d'application . 1
2 Références normatives . 2
3 Termes et définitions . 2
4 Abréviations . 12
5 Principes de la gestion des poids . 13
5.1 Généralités. 13
5.2 Gestion des poids au cours des phases du cycle de vie du projet . 13
5.3 Objectifs de gestion des poids . 14
5.3.1 Objectifs durant la phase d'étude conceptuelle . 14
5.3.2 Objectifs durant les phases FEED, d'ingénierie de détail et de construction . 15
5.3.3 Objectifs durant les phases d'exploitation et de démantèlement . 17
5.4 Illustration du poids en fonction du temps . 17
5.5 Conditions de chargement . 18
5.5.1 Généralités. 18
5.5.2 Conditions de chargement typiques . 19
6 Poids de contrôle . 21
6.1 Généralités. 21
6.2 Objectif . 21
6.3 Poids prévisionnels et poids NTE . 21
Error! Reference source not found.
vi
---------------------- Page: 6 ----------------------
ISO/FDIS 19901-5:2021(E)
6.3.1 Poids prévisionnels . 21
6.3.2 Réserves . 22
6.3.3 Poids NTE . 22
6.4 Conditions et paramètres de chargement . 26
6.5 Poids de contrôle pendant la phase d'exploitat
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 19901-5
ISO/TC 67/SC 7
Petroleum and natural gas
Secretariat: BSI
industries — Specific requirements
Voting begins on:
2021-06-15 for offshore structures —
Voting terminates on:
Part 5:
2021-08-10
Weight management
Industries du pétrole et du gaz naturel — Exigences spécifiques
relatives aux structures en mer —
Partie 5: Gestion des poids
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 19901-5:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 19901-5:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 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
5.3.1 Objectives during conceptual design phase . 7
5.3.2 Objectives during FEED, detail engineering and construction phases . 8
5.3.3 Objectives 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 .13
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 .20
7.3.1 General.20
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 .22
7.4 Construction .23
7.4.1 General.23
7.4.2 Weight database .23
7.4.3 Weight reporting .23
© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 19901-5:2021(E)
7.4.4 Weighing of assemblies .23
7.5 Installation and HUC .23
7.6 Operations .24
7.6.1 General.24
7.6.2 Weight management procedure .24
7.6.3 Weight database .24
7.6.4 Legacy weight databases .25
7.6.5 Laydown and storage drawings .25
7.6.6 Decommissioning .25
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 .26
8.3.1 Equipment .26
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 .28
8.5.5 Spare weighing devices and ancillaries.28
8.6 Witnessing of weighing .28
8.7 Scheduling of weighings .28
8.8 Environmental conditions during a weighing .29
8.9 Weighing operation .29
8.10 Temporary items present during a weighing .29
8.11 Permanent items not installed during a weighing .30
8.12 Weighing certificate .30
9 Requirements for weighing of major assemblies .30
9.1 General .30
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 .32
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
9.3.8 Levelness of the assembly during the weighing .33
9.4 Preparations prior to the weighing .33
9.4.1 Notification and witnessing of weighings .33
9.4.2 Environmental conditions during a weighing .33
9.4.3 Weighing prediction report .34
9.4.4 Temporary items during the weighing .34
9.5 Weighing operation .35
9.5.1 Number of results recorded .35
9.5.2 Readings of load cells and level criteria .35
9.5.3 Consistency of results .35
9.5.4 CoG calculations .35
9.5.5 Weighing report .36
9.5.6 Weighing certificate.36
Annex A (informative) Commentary .37
Annex B (informative) Weighing certificates .41
iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 19901-5:2021(E)
Annex C (informative) Example control weight summary .45
Annex D (informative) Variable weight .46
Annex E (informative) Example decision-making RAPID matrix.50
Annex F (informative) Weighing result uncertainty .52
Annex G (informative) Weight database structure .55
Annex H (informative) Weight management guidelines for concrete structures .56
Annex I (informative) Coordinate systems .59
Annex J (informative) Weight allowances and reserves .61
Annex K (informative) Weight management competencies .63
Bibliography .64
© ISO 2021 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/FDIS 19901-5:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and 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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 7, Offshore
structures, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 12, Materials, equipment and offshore structures for petroleum, petrochemical and
natural gas industries, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 19901-5:2016), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— part title changed to "Weight Management";
— document restructured and columnization removed;
— weight control classes removed;
— requirements for weight management for all project phases implemented;
— annexes deleted or relocated to body of document:
— previous Annex A “Weight data sheets – tagged equipment” combined with previous Annex B
“Weighing certificates” to create new joined into a new Annex B “Weighing certificates”;
— previous Annex C “Weight and load budget (WLB) formats and levels” replaced with new
Annex C “Control weights”;
— deleted previous Annex D “Major elements of the weight displacement”;
— information in previous Annex E “Supplier weighing procedure” relocated to Clause 8;
— deleted previous Annex F “Guidelines for displacement measurement of floating facilities”;
vi © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/FDIS 19901-5:2021(E)
— information in previous Annex G “Requirements for weight control during operations” relocated
to Clause 7;
— information in previous Annex H “Requirements for topsides weight estimation — New builds/
green field” relocated to Clause 7;
— information in previous Annex I “Executive summary description” relocated to Clause 7;
— replaced previous Annex J “Weighing result uncertainty” with Annex F “Weighing result
uncertainty”;
— previous Annex K “Weight control database structure” replaced with new Annex G “Weight
database structure”.
— Annexes added:
— Annex A “Commentary”;
— Annex D “Variable weight”;
— Annex E “Example decision-making RAPID matrix”;
— Annex H “Weight of concrete structures”;
— Annex I “Coordinate systems”;
— Annex J “Weight allowances and reserves”;
— Annex K “Weight management competencies”.
A list of all parts in the ISO 19901 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2021 – All rights reserved vii
---------------------- Page: 7 ----------------------
ISO/FDIS 19901-5:2021(E)
Introduction
The International Standards on offshore structures prepared by TC 67/SC 7 (ISO 19900, the ISO 19901
series, ISO 19902, ISO 19903, ISO 19904-1, the ISO 19905 series, and ISO 19906) constitute a common
basis covering those aspects that address design requirements and assessments of all offshore facilities
used by the petroleum and natural gas industries worldwide. Through their application the intention
is to achieve reliability levels appropriate for manned and unmanned offshore facilities, whatever the
type of structure and the nature of the materials used.
It is important to recognize that structural integrity is an overall concept comprising models for
describing actions, structural analyses, design rules, safety elements, workmanship, quality control
procedures and national requirements, all of which are mutually dependent. The modification of one
aspect of design in isolation can disturb the balance of reliability inherent in the overall concept or
structural system. The implications involved in modifications, therefore, need to be considered in
relation to the overall reliability of all offshore structural systems.
The International Standards on offshore structures prepared by TC 67/SC 7 are intended to provide a
wide latitude in the choice of structural configurations, materials and techniques without hindering
innovation. Sound engineering judgement is therefore necessary in the use of these International
Standards.
viii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 19901-5:2021(E)
Petroleum and natural gas industries — Specific
requirements for offshore structures —
Part 5:
Weight management
1 Scope
This document specifies requirements for managing and controlling the weight and centre of gravity
(CoG) of offshore facilities by means of mass management during all lifecycle phases including;
conceptual design, front end engineering design (FEED), detail engineering, construction and
operations. These can be new facilitie
...
Questions, Comments and Discussion
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