Pipeline corrosion control engineering life cycle -- General requirements

This document specifies the general requirements for control elements in the life cycle of pipeline corrosion control engineering. This document is applicable to all types of pipeline corrosion control engineering programmes.

Ingénierie du contrôle de la corrosion des conduites au cours du cycle de vie -- Exigences générales

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Status
Published
Publication Date
30-Nov-2020
Current Stage
6060 - International Standard published
Start Date
03-Nov-2020
Completion Date
01-Dec-2020
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INTERNATIONAL ISO
STANDARD 23221
First edition
2020-11
Pipeline corrosion control
engineering life cycle — General
requirements
Ingénierie du contrôle de la corrosion des conduites au cours du cycle
de vie — Exigences générales
Reference number
ISO 23221:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 23221:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 23221:2020(E)
Contents Page

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General principles ............................................................................................................................................................................................... 1

5 Objectives ..................................................................................................................................................................................................................... 2

6 Corrosion sources ................................................................................................................................................................................................ 2

7 Pipeline materials ............................................................................................................................................................................................... 2

8 Technology .................................................................................................................................................................................................................. 3

9 Design .............................................................................................................................................................................................................................. 4

10 Research and development ....................................................................................................................................................................... 4

11 Manufacturing ......................................................................................................................................................................................................... 5

12 Construction and installation ................................................................................................................................................................. 5

13 Handling, storage and transportation............................................................................................................................................ 6

14 Commissioning ....................................................................................................................................................................................................... 6

15 Acceptance inspection .................................................................................................................................................................................... 7

16 Operation ..................................................................................................................................................................................................................... 8

17 Maintenance .............................................................................................................................................................................................................. 9

18 Repair ............................................................................................................................................................................................................................... 9

19 Decommissioning, abandonment and disposal ................................................................................................................10

20 Documents and records .............................................................................................................................................................................11

21 Resource management ................................................................................................................................................................................11

22 Comprehensive assessment ...................................................................................................................................................................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 23221:2020(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 156, Corrosion of metals and alloys,

Subcommittee SC 1, Corrosion control engineering life cycle.

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.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 23221:2020(E)
Pipeline corrosion control engineering life cycle — General
requirements
1 Scope

This document specifies the general requirements for control elements in the life cycle of pipeline

corrosion control engineering.

This document is applicable to all types of pipeline corrosion control engineering programmes.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
pipeline corrosion testing and monitoring system

online technology for the real-time testing and feedback of corrosion conditions on both external and

internal pipelines
3.2
temporary decommissioning

suspended operation of a system due to emergencies (such as natural disasters, corrosion leakage, etc.)

Note 1 to entry: The decommissioning system will continue to operate after the emergency measures are taken.

3.3
permanent decommissioning
permanent shutdown of a system

Note 1 to entry: The system has been assessed to have significant technical and economic risks via rigorous

procedures and will no longer continue to operate.
4 General principles

4.1 This document summarizes all the aspects of the pipeline corrosion control engineering life cycle

to provide general requirements for selecting technical and management standards. This document does

not provide specific techniques and management procedures for pipeline corrosion control.

4.2 A traceable and supportive management system shall be established to achieve full control and

sustainable improvement on all aspects of the pipeline corrosion control engineering life cycle.

© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 23221:2020(E)
5 Objectives

5.1 To optimize and coordinate all aspects of the pipeline corrosion control engineering life cycle, the

life cycle of pipeline corrosion control engineering shall be suitable for the full life cycle of the protected

pipeline.

5.2 The objectives of corrosion control engineering shall be communicated, implemented and

maintained at all stages of the pipeline life cycle. The objectives shall be regularly reviewed and improved

to ensure their suitability.
6 Corrosion sources
6.1 Corrosion sources include:

a) internal corrosion sources, including, but not limited to, pipeline transmission medium, flow rate,

temperature and pressure;

b) external corrosion sources, including, but not limited to, environmental factors and corrosive

medium that potentially reacts with pipes under different environmental conditions;

c) new corrosion sources during pipeline operation, including, but not limited to, cathodic disbondment

and pipeline maintenance-related and replacement-related electrochemical corrosion;

d) corrosion sources caused by working conditions changes, including working conditions changes in

both pipeline and pipeline corrosion control facilities.

EXAMPLE Cathodic disbondment caused by a current overload of cathodic protection.

6.2 By referring to the implementation cases and relevant standards, all corrosion sources shall be

accurately identified according to the life cycle requirements of the pipeline system.

NOTE 1 For corrosion sources of pipelines in atmospheres, refer to ISO 9223.
NOTE 2 For corrosion sources of buried pipelines, refer to EN 12501-1.
7 Pipeline materials
7.1 The selection of a pipeline shall be based on the corresponding standards.

NOTE For the selection of a pipeline in petroleum and natural gas industries, refer to ISO 13623.

7.2 The following pipeline selection principles shall be fulfilled.

a) The selected pipeline and its applied environment shall be investigated to ensure corrosion

resistance as well as environmental protection.

b) Once the application requirements are satisfied, the processability, versatility and cost-

effectiveness of the pipeline shall also be considered.
7.3 The pipeline shall be selected using the following procedures.

a) A field investigation on the pipeline working environment shall be carried out to determine

corrosion sources, corrosion factors and corrosion magnitude.

b) With reference to corresponding standards and manuals, an appropriate pipeline that meets the

corrosion resistance requirements shall be selected.
2 © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 23221:2020(E)

c) The pipeline resistance shall be evaluated. In the absence of relevant data for the same or a similar

engineering application, a laboratory simulation or field test is required for the pipeline selection.

d) When a satisfactory durability of the pipeline operation has been achieved, versatility shall be

considered next. It shall take precedence over cost-effectiveness.

7.4 The selected pipeline shall be reviewed and assessed by established procedures. The process of

pipeline selection shall be documented and archived.
8 Technology

8.1 One or more appropriate technologies shall be implemented for pipeline corrosion control

according to the corrosion sources. Considerations of pipeline corrosion control technologies include,

but are not limited to, the following.

a) Reasonable structure design: insulation techniques, the installation of electrical isolation points

and isolation devices, a detailed integrated plan of sleeve, facilities and other electrical affected

zones, and the prevention of unpredicted corrosion, such as shielding of cathodic protection or

cathodic disbondment.

b) Coating protection: selecting coatings materials suitable to the expected operating conditions and

construction process, taking into account budgetary and environmental considerations.

c) Electrochemical protection: evaluating the current density required to resist corrosion via pipeline

polarization or the current flow required for the cathodic protection system, taking total electricity

costs into consideration.

d) Corrosion inhibitor selection: fully investigating the cause of the internal corrosion and the

chemical property of the pipeline transmission medium to select the inhibitor type, frequency and

dose, taking into account the total cost of the use of corrosion inhibitors, if applicable.

e) Cleaning, including chemical and physical cleaning. The type and amount of pollutants pigged from

the pipeline shall be analysed to detect the inhibiting effect and to determine the required pigging

frequency.

f) Environmental protection: environmental-friendly pipeline corrosion control technology and

construction technology shall be preferred.

g) Composite technology: composite pipeline technology without electrochemical corrosion shall be

preferred.

8.2 The selection of pipeline corrosion control technology shall be based on the corresponding

technical standards or specifications followed by a comprehensive evaluation. The general principles are

as follows.

a) Considering the safety of the corrosion control process operation as a priority and evaluating

whether safety requirements can be met.

b) In cases where all the technical requirements have been met, state-of-the-art technology, process,

equipment and materials shall be selected preferentially, while minimizing the costs of corrosion

control.

c) The selected pipeline corrosion control engineering technology shall meet the operating

requirements for different working conditions as well as have a sufficient service life without

generating pollutants.

d) The risk and associated hazards of a pipeline corrosion control technical failure shall be considered.

Pre-controls are required to decrease risks and minimize potential losses from technical failures.

© ISO 2020 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO 23221:2020(E)
NOTE For techniques of risk management, refer to ISO 31000.

8.3 The selected technologies shall have corresponding supportive cases as references. Otherwise,

they shall be verified by appropriate experiments.

8.4 When the requirements of the pipeline system have been met, the selected technologies shall be

coordinated and optimized with other aspects in the pipeline corrosion control system to achieve the

goals of safety, cost-effectiveness, and long-term and environmental-friendly operation.

8.5 All adopted corrosion control technologies shall be reviewed and evaluated via established

procedures, then documented and archived.
9 Design

9.1 All elements, links and nodes in the entire life cycle of the pipeline corrosion control engineering

shall be systematically designed according to the influence of the pipeline operating environment and

transmission medium.

9.2 The principles of pipeline corrosion control engineering design are as follows.

a) Protect the environment and save energy.

b) The site of the pipeline engineering shall avoid environments with interference factors, such as

populated regions, highways, railways, rivers and power lines. The appropriate distance between

the pipeline and such environments shall be kept. The physical space occupied by pipeline

infrastructure shall not be exploited for other purposes.

c) Optimize the design with key materials, facilities and processes according to specific corrosive

environments. Determine the most cost-effective design.

d) It is acceptable to use state-of-the-art technologies, processes, facilities and materials.

e) Pipeline corrosion control engineering design for reconstruction and extension projects shall

rationally use the original facilities.

f) It is acceptable that the expected life cycle of serviceable or replaceable materials and devices

are shorter than the life cycle of the pipeline. The life cycle of unserviceable and unreplaceable

materials and devices shall be consistent with the life cycle of the protected pipeline.

9.3 A green plan for temporary and permanent decommissioning, abandonment and disposal shall be

developed in the stage of design.

9.4 The applicability of the design system shall be evaluated in accordance with the objectives of safety,

cost-effectiveness, and long-term operation and environmental protection. The system design shall be

improved constantly to meet the r
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 23221
ISO/TC 156/SC 1
Pipeline corrosion control
Secretariat: SAC
engineering life cycle — General
Voting begins on:
2020­09­07 requirements
Voting terminates on:
2020­11­02
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 23221:2020(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 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 23221:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 23221:2020(E)
Contents Page

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General principles ............................................................................................................................................................................................... 1

5 Objectives ..................................................................................................................................................................................................................... 2

6 Corrosion sources ................................................................................................................................................................................................ 2

7 Pipeline materials ............................................................................................................................................................................................... 2

8 Technology .................................................................................................................................................................................................................. 3

9 Design .............................................................................................................................................................................................................................. 4

10 Research and development ....................................................................................................................................................................... 4

11 Manufacturing ......................................................................................................................................................................................................... 5

12 Construction and installation ................................................................................................................................................................. 5

13 Handling, storage and transportation............................................................................................................................................ 6

14 Commissioning ....................................................................................................................................................................................................... 6

15 Acceptance inspection .................................................................................................................................................................................... 7

16 Operation ..................................................................................................................................................................................................................... 8

17 Maintenance .............................................................................................................................................................................................................. 9

18 Repair ............................................................................................................................................................................................................................... 9

19 Decommissioning, abandonment and disposal ................................................................................................................10

20 Documents and records .............................................................................................................................................................................11

21 Resource management ................................................................................................................................................................................11

22 Comprehensive assessment ...................................................................................................................................................................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 23221:2020(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 non­governmental, 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 156, Corrosion of metals and alloys,

Subcommittee SC 1, Corrosion control engineering life cycle.

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.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 23221:2020(E)
Pipeline corrosion control engineering life cycle — General
requirements
1 Scope

This document specifies the general requirements for control elements in the life cycle of pipeline

corrosion control engineering.

This document is applicable to all types of pipeline corrosion control engineering programmes.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
pipeline corrosion testing and monitoring system

online technology for the real-time testing and feedback of corrosion conditions on both external and

internal pipelines
3.2
temporary decommissioning

suspended operation of a system due to emergencies (such as natural disasters, corrosion leakage, etc.)

Note 1 to entry: The decommissioning system will continue to operate after the emergency measures are taken.

3.3
permanent decommissioning
permanent shutdown of a system

Note 1 to entry: The system has been assessed to have significant technical and economic risks via rigorous

procedures and will no longer continue to operate.
4 General principles

4.1 This document summarizes all the aspects of the pipeline corrosion control engineering life cycle

to provide general requirements for selecting technical and management standards. This document does

not provide specific techniques and management procedures for pipeline corrosion control.

4.2 A traceable and supportive management system shall be established to achieve full control and

sustainable improvement on all aspects of the pipeline corrosion control engineering life cycle.

© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/FDIS 23221:2020(E)
5 Objectives

5.1 To optimize and coordinate all aspects of the pipeline corrosion control engineering life cycle, the

life cycle of pipeline corrosion control engineering shall be suitable for the full life cycle of the protected

pipeline.

5.2 The objectives of corrosion control engineering shall be communicated, implemented and

maintained at all stages of the pipeline life cycle. The objectives shall be regularly reviewed and improved

to ensure their suitability.
6 Corrosion sources
6.1 Corrosion sources include:

a) internal corrosion sources, including, but not limited to, pipeline transmission medium, flow rate,

temperature and pressure;

b) external corrosion sources, including, but not limited to, environmental factors and corrosive

medium that potentially reacts with pipes under different environmental conditions;

c) new corrosion sources during pipeline operation, including, but not limited to, cathodic disbondment

and pipeline maintenance­related and replacement­related electrochemical corrosion;

d) corrosion sources caused by working conditions changes, including working conditions changes in

both pipeline and pipeline corrosion control facilities.

EXAMPLE Cathodic disbondment caused by a current overload of cathodic protection.

6.2 By referring to the implementation cases and relevant standards, all corrosion sources shall be

accurately identified according to the life cycle requirements of the pipeline system.

NOTE 1 For corrosion sources of pipelines in atmospheres, refer to ISO 9223.
NOTE 2 For corrosion sources of buried pipelines, refer to EN 12501-1.
7 Pipeline materials
7.1 The selection of a pipeline shall be based on the corresponding standards.

NOTE For the selection of a pipeline in petroleum and natural gas industries, refer to ISO 13623.

7.2 The following pipeline selection principles shall be fulfilled.

a) The selected pipeline and its applied environment shall be investigated to ensure corrosion

resistance as well as environmental protection.

b) Once the application requirements are satisfied, the processability, versatility and cost-

effectiveness of the pipeline shall also be considered.
7.3 The pipeline shall be selected using the following procedures.

a) A field investigation on the pipeline working environment shall be carried out to determine

corrosion sources, corrosion factors and corrosion magnitude.

b) With reference to corresponding standards and manuals, an appropriate pipeline that meets the

corrosion resistance requirements shall be selected.
2 © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/FDIS 23221:2020(E)

c) The pipeline resistance shall be evaluated. In the absence of relevant data for the same or a similar

engineering application, a laboratory simulation or field test is required for the pipeline selection.

d) When a satisfactory durability of the pipeline operation has been achieved, versatility shall be

considered next. It shall take precedence over cost-effectiveness.

7.4 The selected pipeline shall be reviewed and assessed by established procedures. The process of

pipeline selection shall be documented and archived.
8 Technology

8.1 One or more appropriate technologies shall be implemented for pipeline corrosion control

according to the corrosion sources. Considerations of pipeline corrosion control technologies include,

but are not limited to, the following.

a) Reasonable structure design: insulation techniques, the installation of electrical isolation points

and isolation devices, a detailed integrated plan of sleeve, facilities and other electrical affected

zones, and the prevention of unpredicted corrosion, such as shielding of cathodic protection or

cathodic disbondment.

b) Coating protection: selecting coatings materials suitable to the expected operating conditions and

construction process, taking into account budgetary and environmental considerations.

c) Electrochemical protection: evaluating the current density required to resist corrosion via pipeline

polarization or the current flow required for the cathodic protection system, taking total electricity

costs into consideration.

d) Corrosion inhibitor selection: fully investigating the cause of the internal corrosion and the

chemical property of the pipeline transmission medium to select the inhibitor type, frequency and

dose, taking into account the total cost of the use of corrosion inhibitors, if applicable.

e) Cleaning, including chemical and physical cleaning. The type and amount of pollutants pigged from

the pipeline shall be analysed to detect the inhibiting effect and to determine the required pigging

frequency.

f) Environmental protection: environmental-friendly pipeline corrosion control technology and

construction technology shall be preferred.

g) Composite technology: composite pipeline technology without electrochemical corrosion shall be

preferred.

8.2 The selection of pipeline corrosion control technology shall be based on the corresponding

technical standards or specifications followed by a comprehensive evaluation. The general principles are

as follows.

a) Considering the safety of the corrosion control process operation as a priority and evaluating

whether safety requirements can be met.

b) In cases where all the technical requirements have been met, state-of-the-art technology, process,

equipment and materials shall be selected preferentially, while minimizing the costs of corrosion

control.

c) The selected pipeline corrosion control engineering technology shall meet the operating

requirements for different working conditions as well as have a sufficient service life without

generating pollutants.

d) The risk and associated hazards of a pipeline corrosion control technical failure shall be considered.

Pre-controls are required to decrease risks and minimize potential losses from technical failures.

© ISO 2020 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO/FDIS 23221:2020(E)
NOTE For techniques of risk management, refer to ISO 31000.

8.3 The selected technologies shall have corresponding supportive cases as references. Otherwise,

they shall be verified by appropriate experiments.

8.4 When the requirements of the pipeline system have been met, the selected technologies shall be

coordinated and optimized with other aspects in the pipeline corrosion control system to achieve the

goals of safety, cost-effectiveness, and long-term and environmental-friendly operation.

8.5 All adopted corrosion control technologies shall be reviewed and evaluated via established

procedures, then documented and archived.
9 Design

9.1 All elements, links and nodes in the entire life cycle of the pipeline corrosion control engineering

shall be systematically designed according to the influence of the pipeline operating environment and

transmission medium.

9.2 The principles of pipeline corrosion control engineering design are as follows.

a) Protect the environment and save energy.

b) The site of the pipeline engineering shall avoid environments with interference factors, such as

populated regions, highways, railways, rivers and power lines. The appropriate distance between

the pipeline and such environments shall be kept. The physical space occupied by pipeline

infrastructure shall not be exploited for other purposes.

c) Optimize the design with key materials, facilities and processes according to specific corrosive

environments. Determine the most cost­effective design.

d) It is acceptable to use state­of­the­art technologies, processes, facilities and materials.

e) Pipeline corrosion control engineering design for reconstruction and extension projects shall

rationally use the original facilities.

f) It is acceptable that the expected life cycle of serviceable or replaceable materials and devices

are shorter than the life cycle of the pipeline. The life cycle of unserviceable and unreplaceable

materials and devices shall be consistent with the life cycle of the protected pipeline.

9.3 A green plan for temporary and permanent decommissioning, abandonment and disposal shall be

developed in the stage of design.
9.4
...

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