prEN ISO 15589-2
(Main)Petroleum and natural gas indurstries - Cathodic protection of pipeline transportation systems - Part 2: Offshore pipelines
Petroleum and natural gas indurstries - Cathodic protection of pipeline transportation systems - Part 2: Offshore pipelines
Erdöl- und Erdgasindustrie - Kathodischer Schutz für Transportleitungssysteme - Teil 2: Offshore-Pipelines (ISO/DIS 15589-2:2021)
Industries du pétrole et du gaz naturel - Protection cathodique des systèmes de transport par conduites - Partie 2: Conduites en mer
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina - Katodna zaščita cevovodov - 2. del: Cevovodi na morju (ISO/DIS 15589-2:2021)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 15589-2:2022
01-januar-2022
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina -
Katodna zaščita cevovodov - 2. del: Cevovodi na morju (ISO/DIS 15589-2:2021)
Petroleum, petrochemical and natural gas industries - Cathodic protection of pipeline
transportation systems - Part 2: Offshore pipelines (ISO/DIS 15589-2:2021)
Erdöl- und Erdgasindustrie - Kathodischer Schutz für Transportleitungssysteme - Teil 2:
Offshore-Pipelines (ISO/DIS 15589-2:2021)
Industries du pétrole, de la pétrochimie et du gaz naturel - Protection cathodique des
systèmes de transport par conduites - Partie 2: Conduites en mer (ISO/DIS 15589-
2:2021)
Ta slovenski standard je istoveten z: prEN ISO 15589-2
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
oSIST prEN ISO 15589-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 15589-2:2022
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oSIST prEN ISO 15589-2:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 15589-2
ISO/TC 67/SC 2 Secretariat: UNI
Voting begins on: Voting terminates on:
2021-11-19 2022-02-11
Petroleum, petrochemical and natural gas industries —
Cathodic protection of pipeline transportation systems —
Part 2:
Offshore pipelines
Industries du pétrole, de la pétrochimie et du gaz naturel — Protection cathodique des systèmes de
transport par conduites —
Partie 2: Conduites en mer
ICS: 75.200
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 15589-2:2021(E)
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 SUPPORTING DOCUMENTATION. © ISO 2021
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oSIST prEN ISO 15589-2:2022
ISO/DIS 15589-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
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oSIST prEN ISO 15589-2:2022
ISO/DIS 15589-2:2021(E)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms.4
4.1 Symbols . 4
4.2 Abbreviated terms . 4
5 General . 5
5.1 Competence assurance . 5
5.2 Compliance . 5
6 Cathodic protection system requirements . 5
6.1 General . 5
6.2 Selection of CP systems. 6
6.2.1 General . 6
6.2.2 System selection considerations . 6
6.3 Isolating joints . 7
7 Design parameters .7
7.1 General . 7
7.2 Protection potentials . 9
7.2.1 Potential criteria . 9
7.2.2 HISC evaluation for martensitic and duplex stainless steel materials . 10
7.2.3 Thermally sprayed aluminium . 11
7.3 Design life . . 11
7.4 Design current densities for bare steel . 11
7.4.1 General . 11
7.4.2 Splash zone . 13
7.4.3 Buried pipelines .13
7.4.4 Thermally Sprayed Aluminum Coated Pipelines .13
7.4.5 Elevated temperatures . 13
7.4.6 Current drains .13
7.5 Coating breakdown factors . 14
8 Galvanic anodes .16
8.1 Design of system . 16
8.2 Selection of anode material . 17
8.3 Electrochemical properties . . 17
8.4 Anode shape and utilization factor . 18
8.5 Mechanical and electrical considerations . 19
9 Galvanic anode manufacturing .20
9.1 Pre-production test . 20
9.2 Coating . 20
9.3 Anode core materials . 20
9.4 Aluminium anode materials . 21
9.5 Zinc anode materials . 21
10 Galvanic anode quality control.22
10.1 General .22
10.2 Steel anode cores . 22
10.3 Chemical analysis of anode alloy . 22
10.4 Anode mass . 22
10.5 Anode dimensions and straightness . 22
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10.5.1 Slender anodes . 22
10.5.2 Bracelet anodes . 22
10.6 Anode core dimensions and position . 23
10.7 Anode surface irregularities . 23
10.7.1 Slender anodes . 23
10.7.2 Bracelet anodes . 23
10.8 Cracks . 24
10.8.1 General . 24
10.8.2 Aluminium slender anodes. 24
10.8.3 Aluminium bracelet anodes . 24
10.9 Internal defects, destructive testing. 25
10.10 Electrochemical quality control testing . 25
11 Galvanic anode installation .26
12 Impressed-current CP systems .27
12.1 Current sources and control . 27
12.2 Impressed-current anode materials . 27
12.3 System design .28
12.4 Manufacturing and installation considerations .29
12.5 Mechanical and electrical considerations .29
13 Documentation .30
13.1 Design, manufacturing and installation documentation .30
13.2 Commissioning procedures . 30
13.3 Operating and maintenance manual . 31
14 Operation, monitoring and maintenance of CP systems .31
14.1 General . 31
14.2 Monitoring plans . . 31
14.3 Repair. 32
Annex A (normative) Galvanic anode CP design procedures .33
Annex B (normative) Attenuation of protection .40
Annex C (informative) Qualification testing of galvanic anode materials . 44
Annex D (normative) CP monitoring and surveys .45
Annex E (informative) Interference .52
Annex F (informative) Pipeline design for CP .54
Bibliography .60
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oSIST prEN ISO 15589-2:2022
ISO/DIS 15589-2:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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.
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 15589-2 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offhore
structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline
transportation systems.
This third edition cancels and replaces the second edition (ISO 15589-2:2012), which has been
extensively revised, with the main changes as follows:
— In Clause 6 recommendations for isolating joints have been expanded.
— In Clause 7 Notes on Table 1 and text in Clause 7.4 have been updated to avoid discrepancies with
Figure 2. Coating breakdown factors have been revised for errors left in the previous edition and
less conservative values for some coating systems have been selected based on feedback from the
industry.
— In Clause 8 Notes and guidance on the design of the system have been updated including
recommendations for buried pipelines. Anode utilization factors have been expanded to cover
additional anodes types.
— In Clause 9, Table 6 has been updated to reflect anode compositions in line with current industry
practices and other standards.
— In Clause 10, additional references have been provided for guidance on core dimensions and position
as well as testing for quality control of anode electrochemical properties. .
— In Annex A, additional anode resistance equations have been provided to cover different anode
types. for the
— Annex B has been modified to present the NORSOK method as normative, while the alternative
method been made informative.
— Annex C has been updated as informative and the test method replaced with references to current
test methods in line with current industry practice.
— The previous Annex E has been removed and replaced by additional guidance on quality control
testing of anodes in Clause 10.10. .
— In the updated Annex E (Interference) additional references for alternating current interference
have been added.
A list of all parts in the ISO 15589 series can be found on the ISO website.
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oSIST prEN ISO 15589-2:2022
ISO/DIS 15589-2:2021(E)
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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oSIST prEN ISO 15589-2:2022
ISO/DIS 15589-2:2021(E)
Introduction
The technical revision of this document has been carried out in order to accommodate the needs of
industry and to move this International Standard to a higher level of service within the petroleum,
petrochemical and natural gas industry.
Pipeline cathodic protection is achieved by the supply of sufficient direct current to the external pipe
surface, so that the steel-to-electrolyte potential is lowered on all the surface to values at which external
corrosion is reduced to an insignificant rate.
Cathodic protection is normally used in combination with a suitable protective coating system to
protect the external surfaces of steel pipelines from corrosion.
Users of this document should be aware that further or differing requirements may be needed for
individual applications. This document is not intended to prevent alternative equipment or engineering
solutions from being used for individual applications. This may be particularly applicable where there is
innovative or developing technology. Where an alternative is offered, it is intended that any variations
from this document be identified and documented.
This document can also be used for offshore pipelines outside the petroleum, petrochemical and natural
gas industries.
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oSIST prEN ISO 15589-2:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 15589-2:2021(E)
Petroleum, petrochemical and natural gas industries —
Cathodic protection of pipeline transportation systems —
Part 2:
Offshore pipelines
1 Scope
This document specifies requirements and gives recommendations for the pre-installation surveys,
design, materials, equipment, fabrication, installation, commissioning, operation, inspection and
maintenance of cathodic protection (CP) systems for offshore pipelines for the petroleum, petrochemical
and natural gas industries as defined in ISO 13623. Hardware Subsea infrastructure used to aid in
the gathering of hydrocarbons, excluding pipelines, flowlines, risers and jumpers are not included in
ISO 15589 as they covered by different industry standards.
This document is applicable to carbon steel, stainless steel and flexible metallic pipelines in offshore
service.
This document is applicable to retrofits, modifications and repairs made to existing pipeline systems.
This document is applicable to all types of seawater and seabed environments encountered in
submerged conditions and on risers up to mean water level.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test
methods
ISO 8044, Corrosion of metals and alloys — Vocabulary
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings
ISO 9606-1, Qualification testing of welders — Fusion welding — Part 1: Steels
ISO 13623, Petroleum and natural gas industries — Pipeline transportation systems
ISO 15589-1, Petroleum, petrochemical and natural gas industries — Cathodic protection of pipeline
systems — Part 1: On-land pipelines
ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules
ISO 18086, Corrosion of metals and alloys — Determination of AC corrosion — Protection criteria
1)
ASTM D1141, Standard Practice for the Preparation of Substitute Ocean Water
1) ASTM International , 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, USA.
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oSIST prEN ISO 15589-2:2022
ISO/DIS 15589-2:2021(E)
2)
AWS D1.1/D1.1M, Structural Welding Code — Steel
3)
EN 10025-(all parts), Hot rolled products of structural steels
EN 10204:2004, Metallic products — Types of inspection documents
NACE Publication 35110, AC Corrosion State-of-the-Art: Corrosion Rate, Mechanism, and Mitigation
Requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8044 and the following 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 https:// www .electropedia .org/
3.1
anode potential
anode-to-electrolyte potential
3.2
anode sled
anodes installed on a structure and connected to the pipeline by a cable
3.3
closed-circuit anode potential
anode potential while electrically linked to the pipeline to be protected
3.4
coating breakdown factor
f
c
ratio of current density required to polarize a coated steel surface as compared to a bare steel surface
3.5
cold shut
horizontal surface discontinuity caused by solidification of the meniscus of the partially cast anodes as
a result of interrupted flow of the casting stream
3.6
driving voltage
difference between the pipeline/electrolyte potential and the anode/electrolyte potential when the
cathodic protection is operating
3.7
electric field gradient
change in electrical potential per unit distance through a conductive medium, arising from the flow of
electric current
3.8
electrochemical capacity
ε
total amount of electric charge that is produced when a fixed mass (usually 1 kg) of anode material is
consumed electrochemically
Note 1 to entry: Electrochemical capacity is expressed in ampere hours.
2) American Welding Society, 550 NW Le Jeune Road, Miami, FL 33126, USA.
3) European Committee for Standardization, Rue de la Science 23, B-1040, Brussels, Belgium.
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3.9
final current density
estimated current density at the end of the lifetime of the pipeline
Note 1 to entry: Final current density is expressed in amperes per square metre.
3.10
hydrogen-induced stress cracking
HISC
cracking due to a combination of load and hydrogen embrittlement caused by the ingress of hydrogen
formed at the steel surface due to the cathodic polarization
3.11
IR drop
voltage due to an
...
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