1、 Reference number ISO/TS 12747:2011(E) ISO 2011TECHNICAL SPECIFICATION ISO/TS 12747 First edition 2011-04-15 Petroleum and natural gas industries Pipeline transportation systems Recommended practice for pipeline life extension Industries du ptrole et du gaz naturel Systmes de transport par conduites
2、 Pratique recommande pour une longue dure des conduites 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
3、and microfilm, without permission in writing from either ISO at the address below or ISOs 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 copyrightiso.org Web www.iso.org Published in Switzerland
4、ii ISO 2011 All rights reservedISO/TS 12747:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .3 4 Abbreviated terms.5 5 Life extension overview5 5.1 General .5 5.2 Assessment process.6 5.3 Assessment requirement
5、s .6 5.4 Limitations on life extension8 5.5 Pipeline system availability9 6 Data compilation9 6.1 General .9 6.2 Data.9 7 Technical integrity of the pipeline system12 7.1 General .12 7.2 PIMS review12 7.3 Remediation requirements .13 8 Future threat identification.13 8.1 General .13 8.2 Generic thre
6、ats 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 life20 9.5 Regulat
7、ory requirements20 9.6 Update of systems and procedures 20 10 Life extension report.21 Bibliography22 ISO/TS 12747:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
8、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-gover
9、nmental, 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. Th
10、e 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
11、. 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 g
12、roup 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
13、 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 furth
14、er 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 r
15、ights. 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. ISO/TS 12747:2011(E) ISO 2011 All rights reserved vIntroduction Within ISO/TC 6
16、7/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
17、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 t
18、hat 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 int
19、erface 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
20、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
21、 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 documen
22、t 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. TECHNICAL SPECIFICATION ISO/TS 12747:201
23、1(E) ISO 2011 All rights reserved 1Petroleum 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
24、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 pipeline
25、s. 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 chang
26、e 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
27、. 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/TS 12747:2011(E) 2 ISO 2011 All rights reservedKey pip
28、eline 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 I
29、SO/TS 12747:2011(E) ISO 2011 All rights reserved 33 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 inten
30、ded 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 opera
31、tional 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 operati
32、ng 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 th
33、e 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
34、 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/TS 12747:2011(E) 4 ISO 2011 All rights reserved3.12 pipeline integrity managemen
35、t 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 f
36、luids 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
37、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 IS
38、O 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 con
39、tinued 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 an
40、d 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 ISO/TS 12747:2011(E) ISO 2011 All rights reserved 53.23 threat any activity or conditio
41、n 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 platforms functions 4 Abbreviated terms CP Cathodic protection ECA Engineering critical assessment ESD
42、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
43、 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 automatica
44、lly 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 th
45、e 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 re
46、quired 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/TS 12747:2011(E) 6 ISO 2011 All rights reserved5.2 Assessment process If the intention is to operate a pipeline system beyond its
47、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
48、. 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
49、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 discusse
