SIST EN ISO 15257:2017
(Main)Cathodic protection - Competence levels of cathodic protection persons - Basis for certification scheme (ISO 15257:2017)
Cathodic protection - Competence levels of cathodic protection persons - Basis for certification scheme (ISO 15257:2017)
ISO 15257:2017 defines five levels of competence (detailed in Clause 4) for persons working in the field of cathodic protection (CP), including survey, design, installation, testing, maintenance and advancing the science of cathodic protection. It specifies a framework for establishing these competence levels and their minimum requirements.
Competence levels apply to each of the following application sectors:
- on-land metallic structures;
- marine metallic structures;
- reinforced concrete structures;
inner surfaces of metallic structures containing an electrolyte.
These application sectors are detailed in Clause 5.
ISO 15257:2017 specifies the requirements to be used for establishing a certification scheme as defined in ISO/IEC 17024. It is not mandatory to apply all of the levels and/or application sectors. This certification scheme is detailed in Annexes A, B and C.
Kathodischer Korrosionsschutz - Qualifikationsgrade von mit kathodischem Korrosionsschutz befassten Personen - Grundlage für ein Zertifizierungsverfahren (ISO 15257:2017)
Protection cathodique - Niveaux de compétence des personnes en protection cathodique - Base pour un dispositif particulier de certification (ISO 15257:2017)
ISO 15257:2017 définit cinq niveaux de compétence (détaillés à l'Article 4) pour les personnes travaillant dans le domaine de la protection cathodique (PC), incluant l'étude préalable, la conception, l'installation, le contrôle, la maintenance, ainsi que les progrès scientifiques en protection cathodique. Il spécifie un cadre pour l'établissement de ces niveaux de compétence, ainsi que les exigences minimales correspondantes.
Les niveaux de compétence s'appliquent à chacun des secteurs d'application suivants:
- les structures métalliques terrestres;
- les structures métalliques en mer;
- les structures en béton armé;
- les surfaces intérieures des structures métalliques contenant un électrolyte.
Ces secteurs d'application sont décrits en détail à l'Article 5.
ISO 15257:2017 spécifie les exigences à utiliser pour établir un dispositif particulier de certification comme défini dans l'ISO/IEC 17024. Il n'est pas obligatoire d'appliquer tous les niveaux et/ou tous les secteurs d'application. Ce dispositif particulier de certification est décrit en détail dans les Annexes A, B et C.
Katodna zaščita - Stopnje usposobljenosti in certifikacija osebja za katodno zaščito - Osnova za shemo certificiranja (ISO 15257:2017)
Ta mednarodni standard določa pet stopenj usposobljenosti in certificiranja osebja, ki deluje na področju katodne zaščite, vključno s pregledom, projektiranjem, namestitvijo, preskušanjem in vzdrževanjem. Določa okvir za vzpostavitev teh stopenj usposobljenosti in certificiranja ter minimalne zahteve. Stopnje usposobljenosti in certificiranja se uporabljajo v vsakem od naslednjih sektorjev: – kovinske strukture na kopnem; – pomorske kovinske strukture; – strukture iz armiranega betona; – notranje površine iz kovinskih oklopnih struktur. Ta mednarodni standard določa zahteve, ki se uporabljajo za vzpostavljanje sheme certificiranja, kot določa standard ISO/IEC 17024. Ta shema certificiranja je podrobno opisana v dodatkih A, B in C. Informacije: Tehnični odbor CEN/TC 219 je razvil standard EN 15257:2006, ki ga sedaj sprejema tehnični odbor ISO/TC 156 z nekaterimi spremembami izvirnega dokumenta EN. Tehnični odbor ISO/TC 156 je registriral delovni element ISO kot delovni element ISO v skladu z dunajskim sporazumom, vendar ga tehnični odbor CEN/TC 219 ni odobril kot aktivni delovni element CEN/TC 219 v skladu z dunajskim sporazumom, kar je potrebno za vzporedno aktivno glasovanje tehničnega odbora CEN/TC 219. Tehnični odbor CEN/TC 219 je odobril NWIP kot delovni element ISO v skladu z dunajskim sporazumom.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2017
1DGRPHãþD
SIST EN 15257:2007
.DWRGQD]DãþLWD6WRSQMHXVSRVREOMHQRVWLLQFHUWLILNDFLMDRVHEMD]DNDWRGQR
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Cathodic protection - Competence levels of cathodic protection persons - Basis for
certification scheme (ISO 15257:2017)
Kathodischer Korrosionsschutz - Qualifikationsgrade von mit kathodischem
Korrosionsschutz befassten Personen - Grundlage für ein Zertifizierungsverfahren (ISO
15257:2017)
Protection cathodique - Niveaux de compétence des personnes en protection cathodique
- Base pour un dispositif particulier de certification (ISO 15257:2017)
Ta slovenski standard je istoveten z: EN ISO 15257:2017
ICS:
03.100.30 Vodenje ljudi Management of human
resources
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 15257
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 77.060 Supersedes EN 15257:2006
English Version
Cathodic protection - Competence levels of cathodic
protection persons - Basis for certification scheme (ISO
15257:2017)
Protection cathodique - Niveaux de compétence des Kathodischer Korrosionsschutz - Qualifikationsgrade
personnes en protection cathodique - Base pour un von mit kathodischem Korrosionsschutz befassten
dispositif particulier de certification (ISO 15257:2017) Personen - Grundlage für ein Zertifizierungsverfahren
(ISO 15257:2017)
This European Standard was approved by CEN on 15 February 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
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, Serbia, 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15257:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 15257:2017) has been prepared by Technical Committee ISO/TC 156
"Corrosion of metals and alloys" in collaboration with Technical Committee CEN/TC 219 “Cathodic
protection” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2017, and conflicting national standards
shall be withdrawn at the latest by December 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 15257:2006.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 15257:2017 has been approved by CEN as EN ISO 15257:2017 without any modification.
INTERNATIONAL ISO
STANDARD 15257
First edition
2017-05
Cathodic protection — Competence
levels of cathodic protection persons
— Basis for a certification scheme
Protection cathodique — Niveaux de compétence des personnes
en protection cathodique — Base pour un dispositif particulier de
certification
Reference number
ISO 15257:2017(E)
©
ISO 2017
ISO 15257:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
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ii © ISO 2017 – All rights reserved
ISO 15257:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Levels of competence . 3
4.1 General . 3
4.2 Level 1, cathodic protection data collector (or tester) . 3
4.3 Level 2, cathodic protection technician . 3
4.4 Level 3, cathodic protection senior technician . 3
4.5 Level 4, cathodic protection specialist. 4
4.6 Level 5, cathodic protection expert . 4
4.7 Designation of competence levels . 4
5 Application sectors . 4
5.1 General . 4
5.2 On-land metallic structures . 5
5.3 Marine metallic structures. 5
5.4 Reinforced concrete structures . 6
5.5 Inner surfaces of metallic structures containing an electrolyte . 6
6 Requirements for competence of persons at various levels and for various
applications sectors . 6
6.1 General . 6
6.2 Knowledge required for all application sectors and all levels . 7
6.3 Tasks to be fulfilled in all application sectors for Levels 1 to 4 . 7
6.4 Specific tasks for on-land metallic structures application sector for Levels 1 to 4.10
6.5 Specific tasks for marine metallic structures application sector for Levels 1 to 4 .12
6.6 Specific tasks for reinforced concrete structures application sector for Levels 1 to 4 .14
6.7 Specific tasks for inner surfaces of metallic structures application sector for Levels
1 to 4 .15
6.8 Requirements for Level 5 CP persons .16
Annex A (normative) Certification scheme: Eligibility for competence assessment for Levels
1 to 4 .17
Annex B (normative) Certification scheme: Examination and assessment .22
Annex C (normative) Certification scheme: Certificate, validity, re-certification,
transition periods.27
Bibliography .30
ISO 15257:2017(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 on 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 the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
iv © ISO 2017 – All rights reserved
ISO 15257:2017(E)
Introduction
This document enables the competence of cathodic protection (CP) persons carrying out cathodic
protection survey, design, installation, testing and maintenance work to be defined and verified.
The relevant application sectors concern on-land metallic structures, marine metallic structures,
reinforced concrete structures and the inner surfaces of metallic structures containing an electrolyte.
Demonstration of competence is possible by certification. This document offers a certification scheme
in accordance with ISO/IEC 17024.
In preparation of Clauses 4, 5 and 6, a detailed job task analysis (JTA) was undertaken by consensus
of the experts in ISO TC 156. This JTA was then subject to review by international experts during
the ISO enquiry process. It is considered that Clauses 4, 5 and 6 constitute a rigorous JTA. The JTA is
largely based on similar work performed by CEN/TC 219, which produced EN 15257, which has been in
widespread use since 2007.
INTERNATIONAL STANDARD ISO 15257:2017(E)
Cathodic protection — Competence levels of cathodic
protection persons — Basis for a certification scheme
1 Scope
This document defines five levels of competence (detailed in Clause 4) for persons working in the field
of cathodic protection (CP), including survey, design, installation, testing, maintenance and advancing
the science of cathodic protection. It specifies a framework for establishing these competence levels
and their minimum requirements.
Competence levels apply to each of the following application sectors:
— on-land metallic structures;
— marine metallic structures;
— reinforced concrete structures;
— inner surfaces of metallic structures containing an electrolyte.
These application sectors are detailed in Clause 5.
This document specifies the requirements to be used for establishing a certification scheme as
defined in ISO/IEC 17024. It is not mandatory to apply all of the levels and/or application sectors. This
certification scheme is detailed in Annexes A, B and C.
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/IEC 17024, Conformity assessment — General requirements for bodies operating certification of persons
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:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
application sector
particular section of industry or technology where specialized cathodic protection survey, design,
installation, testing and maintenance practices are used or the science of cathodic protection is
advanced, requiring specific sector-related knowledge, skill, equipment or training (3.13)
3.2
assessment committee
group appointed by the certification body which reviews applications and examination results and
determines compliance with the requirements for CP certifications offered by the certification body
ISO 15257:2017(E)
3.3
CP person
cathodic protection person
person who devotes a regular and significant percentage of professional activity to the practical
application of cathodic protection within one or more of the application sectors (3.1)
3.4
competence
ability to apply knowledge and skill to achieve intended results
Note 1 to entry: Within the scope of this document, the ability of CP persons (3.3) means to apply defined
knowledge and defined skills and undertake defined tasks at specific levels and specific application sectors (3.1).
3.5
complex structure
system comprising the structure to be protected connected to one or more foreign electrodes and/or
crossing multiple connected electrodes or passing close or through steel-reinforced concrete
EXAMPLE Steel in concrete and earthing installations are examples of foreign electrodes.
3.6
examination centre
place for the examination of competence (3.4) in cathodic protection
Note 1 to entry: The centre includes testing facilities to simulate the conditions that normally exist in real
cathodic protection of operating industrial structures for a given application sector (3.1).
3.7
examiner
person with relevant technical and personal qualifications, and competent to conduct and/or score an
examination
3.8
industrial cathodic protection experience
practice in the applicable cathodic protection techniques and application sector(s) (3.1) concerned,
which leads to the required skill and knowledge
3.9
significant interruption
period of time in which a CP person (3.3) has not practised the duties or undertaken training (3.13)
corresponding to their level of competence (3.4) within an application sector (3.1)
Note 1 to entry: A significant interruption comprises a continuous period in excess of 1,5 years or two or more
periods for a total time exceeding 3 years during the validity of the certificate.
3.10
simple CP system
simple cathodic protection system
cathodic protection system with no design constraints due to external electrical influences, foreign
structure interaction or unpredictable electrolyte changes where the design follows identified and
defined, auditable procedural steps as developed by a person certificated to Level 4
3.11
technical instruction
written description, method statement or work instruction stating the precise steps to be followed
in a cathodic protection survey, design, installation, testing or maintenance activity to an established
standard, code, specification or cathodic protection procedure
3.12
technical report
written report intended to transmit engineering information of a complex, analytical nature
2 © ISO 2017 – All rights reserved
ISO 15257:2017(E)
3.13
training
theoretical and practical instructions given in conformity to a pre-established programme in order to
furnish or increase the knowledge and the ability of CP persons (3.3) in cathodic protection activities
3.14
training centre
centre where training (3.13) of CP persons (3.3) is carried out
Note 1 to entry: The training centre includes demonstration and testing facilities to simulate the electrical
conditions that normally exist in real cathodic protection of operating industrial structures for a given application
sector (3.1).
4 Levels of competence
4.1 General
The competence of CP persons shall be classified in one or more of the following levels, depending on
their competence in particular application sectors.
A detailed description of the requirements of competence is given in Clause 6.
Each defined level of competence shall include also the competence of the corresponding lower levels.
4.2 Level 1, cathodic protection data collector (or tester)
Level 1 CP persons shall be competent to collect CP performance data of simple CP systems and perform
other basic CP tasks in accordance with technical instructions and procedures produced by Level 3 or
higher persons and record the data to a format produced by Level 3, or higher persons and under their
responsibility. Level 1 persons shall not be responsible for analysing the data. Level 1 persons shall
understand the fundamentals of the measurements that they are required to undertake, the common
causes of errors in these measurements and the related safety issues. The measurements shall include
routine system function measurements, as well as a limited number of specific measurements to
determine the performance effectiveness of CP systems.
4.3 Level 2, cathodic protection technician
In addition to the competencies for Level 1 CP persons, Level 2 CP persons shall be competent to
undertake a range of CP measurement, inspection and supervisory activities in accordance with
technical instructions and procedures produced by Level 3 or higher persons, and collate and classify
the data under their responsibility.
Level 2 persons shall have knowledge of the fundamentals of electricity, corrosion, coatings, CP and
measurement techniques, safety issues and applicable standards related to CP.
Level 2 persons shall be competent to check the calibration validity of the CP measuring and testing
equipment, supervise and perform inspection and testing during installation of CP systems and carry
out routine maintenance work on CP systems.
Level 2 persons shall not be responsible for the choice of test method, the technique to be used,
preparing the technical instructions or the interpretation of test results.
4.4 Level 3, cathodic protection senior technician
In addition to the competencies for Level 2 persons, Level 3 persons shall have knowledge of the
general principles of corrosion and CP, the principles of electricity, the significance of coatings and their
influence on CP and a detailed knowledge of CP test procedures and safety issues.
ISO 15257:2017(E)
Level 3 persons shall understand and be competent to perform CP tasks according to established or
recognized procedures. They shall be competent to carry out and supervise all Level 1 and Level 2
duties, provide guidance for persons at Level 1 and Level 2. They shall be competent to prepare technical
instructions for all CP persons of lower-level competence and assess all data collected from these tasks.
4.5 Level 4, cathodic protection specialist
In addition to the competences for Level 3 persons, Level 4 persons shall have detailed knowledge
of corrosion theory, principles of electricity, CP design, installation, commissioning, testing and
performance evaluation, including systems affected by interfering conditions. They shall have
competence in establishing testing and performance criteria where none are otherwise available. They
shall have a general familiarity with CP in all application sectors.
They shall be competent to design CP systems including those where no pre-set parameters or
procedural steps exist. They shall be competent to define the guidelines for specifying, designing and
monitoring CP systems. They shall be competent to consider technical and safety aspects.
They shall be competent to prepare technical instructions for all CP persons of lower-level competence
and assess all data collected from these tasks.
In all of these activities, Level 4 persons are not required to be supervised by Level 5 or other persons.
4.6 Level 5, cathodic protection expert
In addition to the competencies for Level 4 persons, Level 5 CP persons shall have advanced the state
of the art of CP by scientific work and peer-reviewed publications and shall have made a marked and
original contribution to the science or practice of corrosion control by CP.
Level 5 persons shall have all the competences required in Clause 6 for Level 4 persons in at least one
sector and shall have detailed knowledge of CP and a range of competences in all sectors. They shall have
in at least one of the sectors an established and mature reputation as a CP specialist at the highest level.
Level 5 persons shall undertake a range of high-level activities such as management of R&D projects,
publications in technical or scientific journals or books, lectures at congresses or training courses,
participation in standardization or technical committees, lead in the development of new technology or
new applications, editing scientific journals and/or other activities as described in B.5.
It is not precluded for Level 4 persons to perform any of the tasks attributed to Level 5.
It is not a requirement that certification bodies, examination centres or training centres utilize Level 5
CP persons in the operation and management of their activities.
4.7 Designation of competence levels
Levels 1 to 5 are the definitive terms. The terms cathodic protection tester, cathodic protection
technician, cathodic protection senior technician, cathodic protection specialist and cathodic protection
expert are used above in an indicative purpose only.
5 Application sectors
5.1 General
Any of the following application sectors shall be used in the establishment of competence levels of
CP persons. For each of the application sectors (see 5.2 to 5.5), national and international specific
standards may apply.
In addition to the specific knowledge for each application sector, a common core of knowledge is
required.
4 © ISO 2017 – All rights reserved
ISO 15257:2017(E)
5.2 On-land metallic structures
The following topics are relevant to this application sector:
— CP general principles and specific applications in soils and waters;
— CP measurement techniques;
— protection against corrosion by stray current from direct current systems;
— interference from alternating and direct current;
— the relevance of touch potentials.
This application sector includes, for example, the following:
a) buried onshore pipelines;
b) sections of onshore pipelines crossing rivers, lakes or short lengths of sea;
c) landfalls of offshore pipelines protected by an onshore CP system;
d) buried tanks;
e) bottoms (external side) of above-ground tanks;
f) complex structures (see 3.5);
g) well casings;
h) buried plant modules.
5.3 Marine metallic structures
The following topics are relevant to this application sector:
— CP general principles;
— CP measurement techniques;
— specific applications in seawater and marine sediments.
This application sector includes, for example, the following:
a) ships (external hulls and ballast tanks filled with sea water);
b) CP measurement techniques;
c) fixed offshore structures (platforms, jackets, monopiles, offshore windfarms, tension leg
platforms, etc.);
d) floating structures [buoys, semi-submersible platforms, floating production storage and offloading
structures (FPSO)];
e) underwater structures (well heads, manifolds, piping);
f) coastal and offshore pipelines, risers;
g) landfall of offshore pipelines protected by an offshore CP system;
h) harbour facilities, piers, jetties and lock gates.
ISO 15257:2017(E)
5.4 Reinforced concrete structures
The following topics are relevant to this application sector:
— CP general principles;
— CP measurement techniques;
— specific applications of steel in concrete;
— other electrochemical techniques that are also aimed at mitigating corrosion of steel embedded in
concrete, such as electrochemical re-alkalization and chloride extraction treatments for reinforced
concrete.
This application sector includes, for example, the following:
a) atmospherically exposed steel-reinforced (both post-tensioned and pre-stressed) concrete,
onshore structures (bridges, walls, piles, buildings etc.);
b) buried steel-reinforced (both post-tensioned and pre-stressed) concrete structures (pipelines,
tunnels, foundations, etc.);
c) steel-reinforced (both post-tensioned and pre-stressed) concrete structures immersed in fresh
water (pipe lines, foundations, swimming-pools, water tanks);
d) steel-reinforced (both post-tensioned and pre-stressed) concrete structures immersed in seawater
(harbour facilities, piers, jetties, offshore platforms).
5.5 Inner surfaces of metallic structures containing an electrolyte
The following topics are relevant to this application sector:
— CP general principles;
— specific applications of inner surfaces;
— CP measurement techniques.
This application sector includes, for example, the following:
a) fresh water containing equipment (storage tanks, condensers, filters, cooling water systems, etc.);
b) seawater-containing equipment (ballast tanks, flooded dock gates, flooded compartments, flooded
piles, cooling water systems, etc.);
c) oil field production water storage tanks;
d) offshore immersed pumps and the internals of their caissons;
e) inside offshore windfarm monopiles;
f) other electrolyte-containing equipment (tanks and piping).
6 Requirements for competence of persons at various levels and for various
applications sectors
6.1 General
CP persons of competence Levels 1 to 4 shall be knowledgeable in the topics in Table 1 and competent
to undertake the tasks detailed in Table 2 to Table 6. CP persons shall have the knowledge and skill
6 © ISO 2017 – All rights reserved
ISO 15257:2017(E)
to properly and safely undertake these tasks, to understand their purposes, to recognize possible
problems with their execution and the significance of the data arising from them.
All work by Level 1 and Level 2 CP persons shall be according to technical instructions issued by CP
persons of Level 3 or higher.
CP persons of a particular level may assist in tasks at higher levels than defined in Table 2 to Table 6
corresponding to their application sector and competence level for their level alongside and under the
direct supervision of a CP person of the higher level. The higher level person retains the responsibility
for the work performed by the lower-level person.
CP persons of a particular level may undertake without direct supervision tasks at one level higher than
defined in Table 2 to Table 6 for their level provided they shall have received additional documented
training and assessment for the particular task by a CP person of the higher level. This assessment and
documentation may be undertaken within a corporate system.
Each defined level of competence shall include also the competence of the corresponding lower levels.
6.2 Knowledge required for all application sectors and all levels
The knowledge detailed in Table 1 constitutes a common core for all application sectors and all levels.
Table 1 — Knowledge required by persons for all competence levels and all application sectors
Knowledge
Description of knowledge
number
1 Electricity relevant to CP application and measurements
2 Corrosion, electrochemistry and coatings relevant to CP
3 Theory, principles and criteria of CP
4 Requirements related to application of CP
5 Application methods of CP, galvanic anodes, impressed current
6 CP measurements and test procedures
7 Relevance of voltage gradient errors and influence on structure to electrolyte potential
measurement
8 Factors influencing the correct selection of reference electrodes for potential measurements
9 Effects of excessive CP on coatings, high-yield strength steels and corrosion-resistant alloys
10 Diagnostics of CP systems
11 Interference conditions (alternating current and direct current)
12 Standards and codes of practice in the relevant application sector
The level of knowledge in Table 1 shall be progressively increased from Level 1 to Level 4 to conform to
the levels of competency defined in Clause 4, and the tasks in 6.3 to 6.8.
6.3 Tasks to be fulfilled in all application sectors for Levels 1 to 4
Table 2 details the tasks for each level of competence from 1 to 4 whatever the application sector.
Persons shall be competent in these tasks for their particular application sector.
ISO 15257:2017(E)
Table 2 — Tasks to be fulfilled by the various competence levels for all application sectors
Task
Description of task Level 1 Level 2 Level 3 Level 4
number
1 Prepare technical reports No No No Yes
2 Prepare technical instructions No No Yes Yes
3 Collect general information for design
purposes based on technical instructions for No Yes Yes Yes
simple CP systems (as defined in 3.10)
4 Collect detailed information and data for
No No Yes Yes
design purposes
Check calibration validity of CP measuring and
5 Yes Yes Yes Yes
testing equipment based on documentation
6 Measure structure to electrolyte potential Yes Yes Yes Yes
Perform verification test of working portable
7 reference electrode against master electrode of Yes Yes Yes Yes
the same type based on measurement
Perform verification test of working portable
8 reference electrode against another type of No Yes Yes Yes
reference electrode
9 Perform verification test of stationary
reference electrode against a portable refer- No Yes Yes Yes
ence electrode
10 Perform pre-commission testing No Yes Yes Yes
11 Check whether the positive output of the
rectifier is connected to the anode and the neg- No Yes Yes Yes
ative output is connected to the structure
12 Identify a wrong polarity of the CP system by
Yes Yes Yes Yes
structure to electrolyte potential measurement
13 Perform start-up and commissioning No No Yes Yes
14 Record and report results of the measurements
Yes Yes Yes Yes
in a comprehensible format
15 Classify the results of the measurements No Yes Yes Yes
16 Define the limitations of application of the test-
ing method according to established No No Yes Yes
procedures
17 Interpret commissioning or performance
verification data and prepare commissioning
report, performance verification report or No No Yes Yes
system review report for simple CP systems (as
defined in 3.10)
18 Interpret commissioning or performance
verification data and prepare commissioning
report, performance verification report or No No No Yes
system review report for non-simple CP sys-
tems (simple CP systems are defined in 3.10)
19 Measure current and voltage in the CP circuit Yes Yes Yes Yes
20 Carry out basic maintenance work on CP
Yes Yes Yes Yes
systems
21 Inspect and measure of DC power supply
Yes Yes Yes Yes
output current and voltage
22 Inspect and verify DC power supply overall
No Yes Yes Yes
operations
8 © ISO 2017 – All rights reserved
ISO 15257:2017(E)
Table 2 (continued)
Task
Description of task Level 1 Level 2 Level 3 Level 4
number
23 Inspect and maintain DC power supply output
terminations if accessible without exposing Yes Yes Yes Yes
persons to live AC equipment
24 Inspect and maintain DC power supply
No Yes Yes Yes
components
25 Verify DC power supply voltage and current
Yes Yes Yes Yes
outputs with portable calibrated meter
26 Routine and expected adjustment of current
output to maintain pre-determined perfor- No Yes Yes Yes
mance
27 Determine the validity of the data and analyse
No No Yes Yes
anomalies detected
28 Determine increase/decrease in current output
to maintain optimum performance including
No No Yes Yes
remedial actions to correct anomalies and
interferences
29 Ensure compliance with safety requirements
related to application of CP in the application Yes Yes Yes Yes
sector, task and competence level
30 Perform risk assessment of safety require-
ments related to application of CP in the Yes Yes Yes Yes
application sector, task and competence level
31 Translate CP measuring and testing standards
and specifications into technical instructions
No No Yes Yes
for CP measuring and testing, routine
maintenance, and installations procedures
32 Investigate material weight loss corrosion
No No Yes Yes
when application of CP may be involved
33 Set up measuring and testing equipment and
Yes Yes Yes Yes
verify equipment settings
34 Investigate any case of material cracking when
No No No Yes
application of CP may be involved
35 Utilize new developments in science and
technology of corrosion and CP along with field
performance experience and participate in
No No No Yes
developing improvements to CP designs,
operations, performance assessments and
maintenance procedures
36 Write technical instructions for lower-level
persons, supervise and train them in the No No Yes Yes
practice of their tasks
37 Interpret and evaluate results in accordance
with established standards, codes and No No Yes Yes
specifications
38 Undertake, without supervision, simple CP
system (as defined in 3.10) design works ac-
No No Yes Yes
cording to established procedures in a known
environment
39 Establish technical instructions including
definition of CP test procedure and equipment
to be used and the format for reporting data for No No Yes Yes
tasks covered in standards, codes and
specifications
ISO 15257:2017(E)
Table 2 (continued)
Task
Description of task Level 1 Level 2 Level 3 Level 4
number
40 Establish technical instructions including
definition of CP test procedure and equipment
to be used and the format for reporting data for No No No Yes
tasks not fully covered in standards, codes and
specifications
41 Interpret and evaluate results from all tests
performed outside the scope of established No No No Yes
standards, codes and specifications
42 Undertake complex CP designs No No No Yes
Work on the AC mains, side of transformer rectifiers is specifically excluded from the competence
requirements of all levels of personnel. Regulations, training and specific certifications apply for work
on mains voltage equipment.
6.4 Specific tasks for on-land metallic structures application sector for Levels 1 to 4
Table 3 details the specific tasks for each competence level from 1 to 4 in the on-land metallic structures
application sector.
Table 3 — Specific tasks for on-land metallic structures application sector
Task
Description of task Level 1 Level 2 Level 3 Level 4
number
1 Measure metal to electrolyte natural (free corrosion)
Yes Yes Yes Yes
potential
2 Measure resistivity: four-pin Wenner Yes Yes Yes Yes
3 Measure resistivity: soil box methods No Yes Yes Yes
4 Measure resistivity: Schlumberger method No No Yes Yes
5 Calculate vertical resistivity distribution No No Yes Yes
6 Design simple CP systems. Examples are galvanic
anode systems for small tanks in known soil
No No Yes Yes
conditions not affected by AC or DC stray current (as
defined in 3.10)
7 Design non-simple CP systems (simple CP systems
No No No Yes
are defined in 3.10)
8 Supervise the preparation of metallic surface for
No Yes Yes Yes
making cable connections and for repairing coating
9 Supervise the installation of cable connections:
No Yes Yes Yes
bolting, compression and conductive adhesive
10 Supervise the installation of cable connections:
No Yes Yes Yes
soldered, exothermic welded, pin brazed
11 Supervise the installation of galvanic anodes No Yes Yes Yes
12 Supervise the installation of DC power supply
No Yes Yes Yes
(electrical AC supply excluded)
13 Supervise the installation of deep anode impressed
No Yes Yes Yes
current groundbeds
14 Supervise the installation of shallow impressed
No Yes Yes Yes
current anode groundbeds
15 Supervise the installation of isolation devices No Yes Yes Yes
16 Supervise the installation of reference electrodes
No Yes Yes Yes
(including calibration) and coupons
10 © ISO 2017 – All rights reserved
ISO 15257:2017(E)
Table 3 (continued)
Task
Description of task Level 1 Level 2 Level 3 Level 4
number
17 Supervise the installation of AC mitigation earthing
No Yes Yes Yes
electrodes and DC decoupling devices
18 Verify the electrical continuity of all parts of the
No Yes Yes Yes
structure to be protected
19 Locate protected structure and of foreign metallic
structures including buried steel-reinforced No Yes Yes Yes
concrete and electrical earthing systems
20 Inspect and test electrical isolation No Yes Yes Yes
21 Measure structure to electrolyte ON potential Yes Yes Yes Yes
22 Measure structure to electrolyte instant OFF
No Yes Yes Yes
potential
23 Measure structure to electrolyte potential
No Yes Yes Yes
depolarization
24 Report measurements including comparison of
measurement results to a selected CP criteria No Yes Yes Yes
according to procedure
25 Perform close interval potential survey (ON or
No Yes Yes Yes
natural)
26 Perform potential measurement of structure to
No Yes Yes Yes
remote earth
27 Perform close interval polarized potential survey
No Yes Yes Yes
(ON/instant OFF)
28 Establish synchronization of current interruptions
No Yes Yes Yes
for instant OFF measurements
29 Confirm synchronization of current interruptions for
No Yes Yes Yes
instant OFF measurements
30 Measure ON and IR free potential as well as DC and
No Yes Yes Yes
AC current on coupons
31 Measure potential gradients in soil No Yes Yes Yes
32 Intensive measurements (see ISO 15589-1) No No Yes Yes
33 Perform AC frequency current signal attenuation
No No Yes Yes
measurements
34 Perform direct Current Voltage Gradient (DCVG),
No No Yes Yes
non-recording
35 Perform direct Current Voltage Gradient (DCVG),
No No Yes Yes
with recording of digital measurements
36 Perform Pearson surveys (ACVG) No No Yes Yes
37 Perform interference testing and measurement
under interference conditions from a static (not time No Yes Yes Yes
variant) DC source
38 Perform interference testing and measurement
under interference conditions from a dynamic (time No Yes Yes Yes
variant) DC source
39 Analyse and treat DC interferences from a static (not
No No Yes Yes
time variant) source
40 Analyse and treat DC interferences from a dynamic
No No No Yes
(tim
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