Petroleum and natural gas industries - Pipeline transportation systems - Recommended practice for pipeline life extension (ISO/TS 12747:2011)

ISO/TS 12747:2011 gives guidance to follow, as a minimum, in order to assess the feasibility of extending the service life of a pipeline system, as defined in ISO 13623, beyond its specified design life. ISO/TS 12747:2011 applies to rigid metallic pipelines.
Pump stations, compressor stations, pressure-reduction stations and depots are not specifically addressed in ISO/TS 12747:2011.
ISO/TS 12747:2011 is not applicable to the following: flexible pipelines; pipelines constructed from other materials, such as glass reinforced plastics; umbilicals; topsides equipment; and structures and structural components.
ISO/TS 12747:2011 is limited to life extension, which is an example of a change to the original design. Other changes, such as MAOP up-ratings, are excluded.
The assessment methodology is applicable to other changes to the design at the discretion of the user.

Erdöl- und Erdgasindustrie - Rohrleitungstransportsysteme - Empfohlene Maßnahmen zur Verlängerung der Lebensdauer einer Rohrleitung (ISO/TS 12747:2011)

Industries du pétrole et du gaz naturel - Systèmes de transport par conduites - Pratique recommandée pour l'extension de la durée de vie des conduites (ISO/TS 12747:2011)

Industrija za predelavo nafte in zemeljskega plina - Transportni cevovodni sistemi - Priporočene prakse za podaljšanje življenjske dobe cevovodov (ISO/TS 12747:2011)

Ta tehnična specifikacija vsebuje osnovna navodila, ki jih je treba upoštevati, pri oceni izvedljivosti podaljšanja življenjske dobe cevovodov, kot je opredeljeno v standardu ISO 13623. Črpalne postaje, kompresijske postaje, postaje za zmanjševanje tlaka in skladišča niso posebej obravnavani v tej tehnični specifikaciji, kot je prikazano na sliki 1. Ta tehnična specifikacija se uporablja za toge kovinske cevovode. Ne uporablja se za:
– gibljive cevovode;
– cevovode iz drugih materialov, kot je s steklom ojačana plastika;
– oskrbovalne cevovode;
– opremo na površini;
– strukture in strukturne sestavne dele.
Ta tehnična specifikacija je omejena na podaljševanje življenjske dobe, kar je primer spremembe prvotne zasnove. Druge spremembe, kot je dvig najvišjega dovoljenega tlaka delovanja (MAOP), so izključene. OPOMBA: Metodologija ocenjevanja se lahko po presoji uporabnika uporablja za druge spremembe zasnove.

General Information

Status
Published
Publication Date
01-Oct-2013
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
02-Oct-2013
Completion Date
02-Oct-2013

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SLOVENSKI STANDARD
SIST-TS CEN ISO/TS 12747:2014
01-januar-2014

,QGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD7UDQVSRUWQLFHYRYRGQLVLVWHPL

3ULSRURþHQHSUDNVH]DSRGDOMãDQMHåLYOMHQMVNHGREHFHYRYRGRY ,6276


Petroleum and natural gas industries - Pipeline transportation systems - Recommended

practice for pipeline life extension (ISO/TS 12747:2011)
Erdöl- und Erdgasindustrie - Rohrleitungstransportsysteme - Empfohlene Maßnahmen
zur Verlängerung der Lebensdauer einer Rohrleitung (ISO/TS 12747:2011)

Industries du pétrole et du gaz naturel - Systèmes de transport par conduites - Pratique

recommandée pour l'extension de la durée de vie des conduites (ISO/TS 12747:2011)

Ta slovenski standard je istoveten z: CEN ISO/TS 12747:2013
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
SIST-TS CEN ISO/TS 12747:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN ISO/TS 12747:2014
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SIST-TS CEN ISO/TS 12747:2014
TECHNICAL SPECIFICATION
CEN ISO/TS 12747
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
October 2013
ICS 75.200
English Version
Petroleum and natural gas industries - Pipeline transportation
systems - Recommended practice for pipeline life extension
(ISO/TS 12747:2011)

Industries du pétrole et du gaz naturel - Systèmes de Erdöl- und Erdgasindustrie - Rohrleitungstransportsysteme

transport par conduites - Pratique recommandée pour - Empfehlungen für die Verlängerung der Lebensdauer von

l'extension de la durée de vie des conduites (ISO/TS Rohrleitungen (ISO/TS 12747:2011)

12747:2011)

This Technical Specification (CEN/TS) was approved by CEN on 24 September 2013 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their

comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available

promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)

until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 12747:2013: E

worldwide for CEN national Members.
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SIST-TS CEN ISO/TS 12747:2014
CEN ISO/TS 12747:2013 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST-TS CEN ISO/TS 12747:2014
CEN ISO/TS 12747:2013 (E)
Foreword

The text of ISO 12747:2011 has been prepared by Technical Committee ISO/TC 67 “Materials, equipment

and offshore structures for petroleum, petrochemical and natural gas industries” of the International

Organization for Standardization (ISO) and has been taken over as CEN ISO/TS 12747:2013 by Technical

Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum, petrochemical and

natural gas industries” the secretariat of which is held by AFNOR.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,

Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,

Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO/TS 12747:2011 has been approved by CEN as CEN ISO/TS 12747:2013 without any

modification.
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SIST-TS CEN ISO/TS 12747:2014
TECHNICAL ISO/TS
SPECIFICATION 12747
First edition
2011-04-15
Petroleum and natural gas industries —
Pipeline transportation systems —
Recommended practice for pipeline life
extension
Industries du pétrole et du gaz naturel — Systèmes de transport par
conduites — Pratique recommandée pour une longue durée des
conduites
Reference number
ISO/TS 12747:2011(E)
ISO 2011
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SIST-TS CEN ISO/TS 12747:2014
ISO/TS 12747:2011(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2011

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved
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SIST-TS CEN ISO/TS 12747:2014
ISO/TS 12747:2011(E)
Contents Page

Foreword ............................................................................................................................................................iv

Introduction.........................................................................................................................................................v

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................3

4 Abbreviated terms.................................................................................................................................5

5 Life extension overview........................................................................................................................5

5.1 General ...................................................................................................................................................5

5.2 Assessment process.............................................................................................................................6

5.3 Assessment requirements ...................................................................................................................6

5.4 Limitations on life extension................................................................................................................8

5.5 Pipeline system availability..................................................................................................................9

6 Data compilation....................................................................................................................................9

6.1 General ...................................................................................................................................................9

6.2 Data.........................................................................................................................................................9

7 Technical integrity of the pipeline system........................................................................................12

7.1 General .................................................................................................................................................12

7.2 PIMS review..........................................................................................................................................12

7.3 Remediation requirements .................................................................................................................13

8 Future threat identification.................................................................................................................13

8.1 General .................................................................................................................................................13

8.2 Generic threats ....................................................................................................................................13

8.3 Threats specific to offshore pipeline systems .................................................................................14

8.4 Threats specific to onshore pipeline systems .................................................................................14

9 Life extension assessment.................................................................................................................14

9.1 Risk assessment .................................................................................................................................14

9.2 Pipeline system design review ..........................................................................................................16

9.3 Assessment of remnant life ...............................................................................................................17

9.4 Integrity management during extended life......................................................................................20

9.5 Regulatory requirements....................................................................................................................20

9.6 Update of systems and procedures ..................................................................................................20

10 Life extension report...........................................................................................................................21

Bibliography......................................................................................................................................................22

© ISO 2011 – All rights reserved iii
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ISO/TS 12747:2011(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

In other circumstances, particularly when there is an urgent market requirement for such documents, a

technical committee may decide to publish other types of normative document:

— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in

an ISO working group and is accepted for publication if it is approved by more than 50 % of the members

of the parent committee casting a vote;

— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical

committee and is accepted for publication if it is approved by 2/3 of the members of the committee

casting a vote.

An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a

further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is

confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an

International Standard or be withdrawn.

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.

ISO/TS 12747 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore

structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline

transportation systems.
iv © ISO 2011 – All rights reserved
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ISO/TS 12747:2011(E)
Introduction

Within ISO/TC 67/SC 2 there has been a series of discussions concerning both the needs and level of

prescription required to address pipeline life extension issues. These have highlighted that

⎯ operators are applying differing approaches, which leads to inefficient use of both operator and authority

resources;

⎯ the assessment and upgrading of existing facilities have been based on probabilistic or reliability-based

methods;
⎯ the level of detail delivered varies.

The purpose of this Technical Specification is to address the above concerns by providing a consistent

approach to pipeline life extension assessment that can be applied by operators (or parties acting on their

behalf) across the industry.

This Technical Specification is concerned with the proof of technical integrity of the pipeline system for the

justification of extended operation. Integrity management is not covered in detail. However, the interface

between a PIMS and the life extension process is considered because

⎯ a PIMS, where present, forms an integral part of the integrity assessment of the pipeline system;

⎯ a PIMS of some form is required for operation in extended life.

Factors affecting the future operability of the system but not the technical integrity, such as the loss of a

control umbilical, are flagged as requiring assessment but are not addressed in full in this Technical

Specification.

Whilst this Technical Specification is aimed primarily at the pipeline operators, it can also be of interest to

other stakeholders such as
⎯ regulators approving the life extension application;

⎯ members of the public affected by the life extension application, such as landowners and developers.

In light of this, an overview of the life extension process and the key principles involved is given in Clause 5.

The remainder of the document is intended to provide detailed guidance to those performing the life extension

assessments.

All guidance is provided for use in conjunction with sound engineering practice and judgment. This Technical

Specification is not intended for use as a design code.
© ISO 2011 – All rights reserved v
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SIST-TS CEN ISO/TS 12747:2014
TECHNICAL SPECIFICATION ISO/TS 12747:2011(E)
Petroleum and natural gas industries — Pipeline transportation
systems — Recommended practice for pipeline life extension
1 Scope

This Technical Specification gives guidance to follow, as a minimum, in order to assess the feasibility of

extending the service life of a pipeline system, as defined in ISO 13623, beyond its specified design life. Pump

stations, compressor stations, pressure-reduction stations and depots are not specifically addressed in this

Technical Specification, as shown in Figure 1.

This Technical Specification applies to rigid metallic pipelines. It is not applicable to the following:

⎯ flexible pipelines;
⎯ pipelines constructed from other materials, such as glass reinforced plastics;
⎯ umbilicals;
⎯ topsides equipment;
⎯ structures and structural components.

This Technical Specification is limited to life extension, which is an example of a change to the original design.

Other changes, such as MAOP up-ratings, are excluded.

NOTE The assessment methodology is applicable to other changes to the design at the discretion of the user.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 13623, Petroleum and natural gas industries — Pipeline transportation systems

© ISO 2011 – All rights reserved 1
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SIST-TS CEN ISO/TS 12747:2014
ISO/TS 12747:2011(E)
Key
pipeline systems covered by ISO/TS 12747
connection with other facilities
pipeline not covered by ISO/TS 12747
station/plant area or offshore installation not covered by ISO/TS 12747
station/plant area covered by ISO/TS 12747
Figure 1 — Extent of pipeline systems covered by this Technical Specification
2 © ISO 2011 – All rights reserved
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SIST-TS CEN ISO/TS 12747:2014
ISO/TS 12747:2011(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
acceptance criteria

specified indicators or measures employed in assessing the ability of a component, structure, or system to

perform its intended function
3.2
anomaly

discrepancy or deviation of an element of the pipeline system from the established rules and limits

3.3
design life
period for which the design basis is planned to remain valid
[ISO 13623]
3.4
failure

event in which a component or system does not perform according to its operational requirements

3.5
flow assurance
ensuring successful and economical flow of fluid through the pipeline system
3.6
high integrity pressure protection system

mechanical overpressure protection system that rapidly isolates the pipeline if there is a risk of exceeding the

maximum allowable operating pressure (MAOP)
3.7
life extension

additional period of time beyond the original design or service life (but within the assessed remnant life) for

which permission to continue operating a pipeline system is granted by the regulatory bodies

NOTE Life extension is considered as a modification to the design basis.
3.8
location class

geographic area classified according to criteria based on population density and human activity

[ISO 13623]
3.9
maximum allowable operating pressure

maximum pressure at which the pipeline system, or parts thereof, is allowed to be operated

[Adapted from ISO 13623]
3.10
operation

activities involved with running and maintaining the pipeline system in accordance with the design premise

3.11
operator

party ultimately responsible for the operation and integrity of the pipeline system

© ISO 2011 – All rights reserved 3
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ISO/TS 12747:2011(E)
3.12
pipeline integrity management system

management system designed to ensure the safe operation of a pipeline system in accordance with the

design intent, by control of the physical condition of a pipeline, the operating conditions within the system and

any changes made to the system
3.13
pipeline

those facilities through which fluids are conveyed, including pipe, pig traps, components and appurtenances,

up to and including the isolating valves
[Adapted from ISO 13623]
3.14
pipeline

〈offshore〉 pipeline laid in maritime waters and estuaries seaward of the ordinary high water mark

[ISO 13623]
3.15
pipeline

〈onshore〉 pipeline laid on or in land, including lines laid under inland water courses

[ISO 13623]
3.16
pipeline system

pipelines, stations, supervisory control and data acquisition system (SCADA), safety systems, corrosion

protection systems, and any other equipment, facility or building used in the transportation of fluids

[ISO 13623]
3.17
remnant life

assessed period of time (irrespective of the defined design life) for which a pipeline system can be operated

safely, based on time-dependent degradation mechanisms such as corrosion and fatigue

3.18
required life

desired operational life of the pipeline, accounting for continued operation beyond the original pipeline design

life
3.19
risk

qualitative or quantitative likelihood of an event occurring, considered in conjunction with the consequence of

the event
3.20
risk management

policies, procedures and practices involved in the identification, assessment, control and mitigation of risks

3.21
service life
length of time over which the pipeline system is intended to operate
3.22
technical integrity
ability of the pipeline system to function in accordance with the design basis
4 © ISO 2011 – All rights reserved
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ISO/TS 12747:2011(E)
3.23
threat

any activity or condition that can adversely affect the pipeline system if not adequately controlled

3.24
topsides

structures and equipment placed on a supporting structure (fixed or floating) to provide some or all of a

platform’s functions
4 Abbreviated terms
CP Cathodic protection
ECA Engineering critical assessment
ESD Emergency shut-down
ESDV Emergency shut-down valve
HIPPS High integrity pressure protection system
ILI In-line inspection
IP Intelligent pig
MAOP Maximum allowable operating pressure
PIMS Pipeline integrity management system
QRA Quantitative risk assessment
ROW Right of way
SCADA Supervisory control and data acquisition
VIV Vortex-induced vibration
5 Life extension overview
5.1 General

The design life of a pipeline is derived to prevent failure during operation due to time-dependent degradation

mechanisms such as corrosion and fatigue. However, the expiry of the design life does not automatically

mean that the pipeline system is not fit-for-purpose because

⎯ corrosion rates determined during the design process could have been conservative and/or corrosion

defects could have been repaired;
⎯ the anticipated operational fatigue damage could have been overestimated.

Extended operation beyond the pipeline design life can be desirable when recoverable oil and gas remain, or

where additional operational assets are tied (or will be tied) into the pipeline system.

NOTE There are alternatives to pipeline life extension, such as installing a replacement pipeline. Therefore, a

business case is required to determine the most suitable option by comparing the cost of the mitigation necessary to

achieve the desired life extension with the cost of a new pipeline.
© ISO 2011 – All rights reserved 5
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ISO/TS 12747:2011(E)
5.2 Assessment process

If the intention is to operate a pipeline system beyond its specified design life, a life extension assessment

shall be performed. The aim of this assessment is to demonstrate that by extending the life of the pipeline

system, the operator is not exposing society to unacceptable risk.

Figure 2 illustrates the pipeline system life extension assessment process. The shaded boxes highlight the

distinct stages of the assessment and cross-references to the clause of this Technical Specification dealing

with a particular stage are provided.

The process begins with a requirement for pipeline extension (item 1) and an assessment of the current

integrity of the pipeline system (item 2). The life extension needs should then be defined (item 3), prior to

commencement of the life extension assessment (item 4).

The life extension assessment shall consider conditions found during the normal operational life that were not

considered in the design. Examples are time-dependent cracking mechanisms (e.g. SCC) and manufacturing

flaws that can grow under the effect of cyclic loading. The requirements of the life extension assessment are

discussed in more detail in 5.3.

Once an acceptable life extension has been determined, the assessment process shall be fully documented

(item 5). If life extension is not possible (or if a replacement pipeline is the most economical solution), the

pipeline should be decommissioned at the end of the design life as originally planned.

5.3 Assessment requirements

The life extension process illustrated in Figure 2 involves an assessment of the current pipeline system

integrity and an assessment to determine the suitability of the pipeline system for life extension.

The assessment of the current integrity (item 2) shall include, but not be limited to, the following:

⎯ review of the pipeline system operational history;
⎯ detailed assessment of the current technical integrity of the pipeline system.

The life extension assessment (item 4) shall include, but not be limited to, the following:

a) risk assessment for extended operation;

b) review of the pipeline system design, including a gap analysis to identify the additional requirements of

the current design codes;
c) assessment of the remnant life of the system, including the following:

⎯ corrosion assessment, accounting for both accumulated and future corrosion in combination with a

defect assessment;
⎯ fatigue assessment, accounting for both accumulated and future fatigue damage;
⎯ coating breakdown and CP system degradation assessment;

⎯ identification and assessment of any other time-dependent degradation mechanism active in the

pipeline;
6 © ISO 2011 – All rights reserved
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ISO/TS 12747:2011(E)
Figure 2 — Pipeline system life extension process
© ISO 2011 – All rights reserved 7
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SIST-TS CEN ISO/TS 12747:2014
ISO/TS 12747:2011(E)

d) revision or introduction of the PIMS for the extended operating period, including update of the anomaly

limits;

e) identification of any tenure issue (e.g. expiry of permit to occupy land) or statutory requirements (e.g.

pipeline license renewal), including a gap analysis to identify any additional regulatory requirements

introduced during the pipeline design life;
f) review of the adequacy of the safety and operating systems;

g) review of the adequacy of the operating and maintenance, emergency response and safety and

environmental procedures.

Additional studies shall be performed as required, in order to determine the need for remedial measures to

mitigate the threats to the pipeline system anticipated during the extended operational period.

5.4 Limitations on life extension

The allowable life extension is governed by the assessed remnant life of the pipeline system, as illustrated in

Figure 3.
Figure 3 — Life extension and remnant life

If the required life of the pipeline system exceeds the remnant life, the remnant life assessment may be

repeated considering the implementation of remedial measures, such as
⎯ replacement of pipeline components;
⎯ reassessment of anomaly limits and rectification of any anomalies;
⎯ derating of the pipeline system.

Alternatively, it is possible to perform the life extension in stages. This is illustrated by the following examples.

EXAMPLE 1 A life extension of 20 years is required for a pipeline system, following the tie-in of a new asset, but the

remnant life of the pipeline system is only 5 years due to excessive riser corrosion. In this case, an initial 5-year life

extension can be made, followed by a further extension of 15 years upon replacement of the riser at the end of its remnant

life.
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ISO/TS 12747:2011(E)

EXAMPLE 2 A life extension of 20 years is required for a pipeline system, but due to the predicted corrosion rates, a

reduction in MAOP will be required in 2 years. In a fashion similar to Example 1 above, an initial 2-year life extension can

be made, with a further extension of 18 years subject to favourable results from an ILI run. If the ILI run confirmed the

predicted corrosion rate, reduction in MAOP or rectification of the unacceptable defects would still

...

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