ISO 12747:2025
(Main)Oil and gas industries including lower carbon energy — Pipeline transportation systems — Requirements and guidance for pipeline life extension assessment
Oil and gas industries including lower carbon energy — Pipeline transportation systems — Requirements and guidance for pipeline life extension assessment
This document presents assessment requirements and associated guidance for extending the service life of a pipeline system, as defined in ISO 13623, beyond its specified design life. It applies to both onshore and offshore rigid metallic pipelines and risers [including steel catenary risers (SCRs)]. This document is not directly applicable to the following: — flexible pipelines; — pipelines constructed from other materials, such as glass reinforced plastics or polymers; — umbilicals (control or chemical conveyance service, or both); — topsides equipment and piping (outside of pipeline system limits defined in accordance with local regulatory requirements); — pipeline protection and support structures and components. However, the assessment process defined herein can be applied in the lifetime extension assessment of the above at the discretion of the user. This document addresses life extension, which is a change to the original design premise. It is also applicable to other changes to the design premise, such as maximum allowable operating pressure (MAOP) re-ratings or a change to the conveyed fluids, at the discretion of the user.
Titre manque
Le présent document fournit des lignes directrices sur la manière d'évaluer la faisabilité d'une prolongation de la durée de vie d'un réseau de conduites, tel qu'il est défini dans la norme ISO 13623, au-delà de sa durée de vie de conception spécifiée. Les stations de pompage, les postes de compression, les stations de réduction de pression et les dépôts ne sont pas spécifiquement abordés dans le présent document, comme le montre la Figure 1. Le présent document s'applique aux conduites et aux colonnes montantes métalliques rigides (y compris les SCR), tant à terre qu'en mer. Il n'est pas directement applicable dans les cas suivants : — les conduites souples ; — les conduites construites à partir d'autres matériaux, tels que les plastiques renforcés de verre ou les polymères ; — les liaisons ombilicales (service de contrôle et/ou de transport des produits chimiques) ; — l'équipement et la tuyauterie de surface (en dehors des limites du réseau de conduites définies conformément aux exigences réglementaires locales) ; — les structures et composants de protection et de soutien des conduites. NOTE 1 Le processus d'évaluation défini dans le paragraphe 5.3 peut être appliqué dans l'évaluation de la prolongation de la durée de vie de ce qui précède, à la discrétion de l'utilisateur. À titre d'exemple, l'Annexe A donne des lignes directrices sur l'utilisation du processus pour la prolongation de la durée de vie des conduites flexibles non collées. NOTE 2 D'autres lignes directrices sur la prolongation de la durée de vie des systèmes sous-marins, y compris les liaisons ombilicales et les équipements de surface, sont fournies dans la norme NORSOK U-009. NOTE 3 Bien que la prolongation de la durée de vie des structures et des éléments de structure ne soit pas traitée dans la présente norme, le maintien de l'aptitude au service des structures ayant une incidence directe sur l'intégrité structurelle du système de conduites doit être pris en compte pendant toute période d'exploitation prolongée. Ceci doit inclure l'évaluation des conséquences de la dégradation structurelle sur l'intégrité du système de conduites. La norme NORSOK N-006 donne des lignes directrices supplémentaires. Le présent document traite de la prolongation de la durée de vie, qui est une modification du principe de conception initial. Il peut également s'appliquer à d'autres modifications du principe de conception, telles que des réévaluations de la PMAD ou un changement des fluides transportés, à la discrétion de l'utilisateur. Des lignes directrices sur ce dernier point sont fournies à l'Annexe B, étant donné que la prolongation de la durée d'exploitation d'un réseau de conduites peut dépendre uniquement d'un changement des fluides d'exploitation (comme dans le cas de la réutilisation d'une conduite pour le CCUS ou le transport de l'hydrogène).
General Information
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Standards Content (Sample)
International
Standard
ISO 12747
First edition
Oil and gas industries including
2025-06
lower carbon energy — Pipeline
transportation systems —
Requirements and guidance for
pipeline life extension assessment
Reference number
© ISO 2025
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Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 6
5 Life extension overview . 7
5.1 General .7
5.2 Assessment process .7
5.3 Assessment requirements .8
5.4 Limitations on life extension .10
5.5 Pipeline system availability .11
5.5.1 General .11
5.5.2 Pipeline ancillary components .11
5.5.3 Threats .11
6 Data compilation .12
7 Structural integrity of the pipeline system .12
7.1 General . 12
7.2 Structural integrity assessment . 13
7.3 PIMS review . 13
7.4 Remediation requirements. 13
8 Future threat identification . 14
9 Life extension assessment . 14
9.1 Risk assessment .14
9.1.1 Process .14
9.1.2 Use of risk assessment in life extension .14
9.1.3 Risk management . 15
9.2 Pipeline system design review . 15
9.2.1 Design standards . 15
9.2.2 Changes to the design basis . .16
9.2.3 Additional data requirements .17
9.3 Assessment of remnant life .17
9.3.1 General .17
9.3.2 Corrosion assessment .17
9.3.3 Fatigue and flaw assessment .18
9.3.4 Remediation.19
9.4 Integrity management during extended life .19
9.4.1 PIMS .19
9.4.2 Inspection and monitoring . 20
9.4.3 Integrity of risers within caissons and j-tubes . 20
9.5 Regulatory requirements.21
9.6 Update of systems and procedures .21
9.6.1 General .21
9.6.2 Emergency response procedures .21
9.6.3 Operations and safety systems .21
10 Life extension report .21
Annex A (informative) Considerations for lifetime extension of unbonded flexible pipe .23
Annex B (normative) Change of fluid .25
Annex C (informative) Typical data requirements .27
iii
Annex D (informative) Defect and anomaly assessment guidance .31
Annex E (informative) Common threats to rigid pipelines .32
Annex F (informative) Inspection, testing, monitoring and sampling techniques .33
Bibliography .35
iv
Foreword
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This document was prepared by Technical Committee ISO/TC 67, Oil and gas industries including lower
carbon energy, Subcommittee SC 2, Pipeline transportation systems, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 12, Oil and gas industries including lower
carbon energy, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This first edition cancels and replaces ISO/TS 12747:2011, which has been technically revised.
The main changes are as follows:
— assessment requirements for lifetime extension considering a change of pipeline fluid, beyond that which
can occur naturally as fluid sources or compositions change, have been incorporated;
— additional references to codes and standards detailing assessment approaches suitable for the
assessment of threats identified as part of a lifetime extension assessment have been added, and the
existing references updated as appropriate;
— guidance
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