SIST EN ISO 24656:2022
(Main)Cathodic protection of offshore wind structures (ISO 24656:2022)
Cathodic protection of offshore wind structures (ISO 24656:2022)
This document specifies the requirements for the external and internal cathodic protection for offshore wind farm structures. It is applicable for structures and appurtenances in contact with seawater or seabed environments. This document addresses:
— design and implementation of cathodic protection systems for new steel structures;
— assessment of residual life of existing cathodic protection systems;
— design and implementation of retrofit cathodic protection systems for improvement of the protection level or for life extension of the protection;
— inspection and performance monitoring of cathodic protection systems installed on existing structures, and
— guidance on cathodic protection of reinforced concrete structures.
Kathodischer Korrosionsschutz von Offshore-Windparkstrukturen (ISO 24656:2022)
Dieses Dokument legt die Anforderungen an den äußeren und inneren kathodischen Korrosionsschutz für Offshore Windparkbauwerke fest. Es ist für Bauwerke und Zubehörteile anwendbar, die mit Meerwasser oder Umgebungen am Meeresboden in Berührung kommen. Dieses Dokument behandelt Folgendes:
— die Auslegung und Umsetzung von kathodischen Korrosionsschutzsystemen für neue Stahlkonstruktionen;
— die Bewertung der Restlebensdauer von bereits vorhandenen kathodischen Korrosionsschutzsystemen;
— die Auslegung und Umsetzung von nachgerüsteten kathodischen Korrosionsschutzsystemen zur Verbes¬serung des Schutzgrades oder zur Verlängerung der Lebensdauer des Schutzes;
— die Überprüfung und Leistungsüberwachung von kathodischen Korrosionsschutzsystemen, die bei vorhandenen Bauwerken eingebaut sind;
— einen Leitfaden bezüglich des kathodischen Korrosionsschutzes von Stahlbetonbauwerken.
Protection cathodique des structures éoliennes offshore (ISO 24656:2022)
Le présent document spécifie les exigences relatives à la protection cathodique extérieure et intérieure des structures des parcs éoliens en mer. Il est applicable aux structures et équipements en contact avec l'eau de mer ou les fonds marins. Le présent document couvre:
— le dimensionnement et la mise en œuvre de systèmes de protection cathodique pour les structures en acier neuves;
— l'évaluation de la durée de vie résiduelle de systèmes de protection cathodique existants;
— le dimensionnement et la mise en œuvre de systèmes de protection cathodique pour remise à niveau, destinés à améliorer le niveau de protection ou à prolonger la durée de vie de la protection;
— le contrôle et la surveillance des performances de systèmes de protection cathodique mis en place sur des structures existantes; et
— les recommandations relatives à la protection cathodique de structures en béton armé.
Katodna zaščita vetrnih konstrukcij na morju (ISO 24656:2022)
Ta evropski standard bo obravnaval zunanjo in notranjo katodno zaščito konstrukcij vetrnih elektrarn na morju. Uporabljal se bo za konstrukcije in opremo, ki je v stiku z morsko vodo ali morskim dnom. Ta standard obravnava:
• načrtovanje in izvajanje sistemov katodne zaščite za nove konstrukcije;
• ocenjevanje preostale življenjske dobe obstoječih sistemov katodne zaščite;
• načrtovanje in izvajanje rekonstrukcije sistemov katodne zaščite za izboljšanje ravni zaščite ali podaljšanje življenjske dobe zaščite;
• pregled in spremljanje delovanja sistemov katodne zaščite, vgrajenih v obstoječe konstrukcije;
• smernice za katodno zaščito konstrukcij iz armiranega betona.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2022
Katodna zaščita vetrnih konstrukcij na morju (ISO 24656:2022)
Cathodic protection of offshore wind structures (ISO 24656:2022)
Kathodischer Korrosionsschutz von Offshore-Windparkstrukturen (ISO 24656:2022)
Protection cathodique des structures éoliennes offshore (ISO 24656:2022)
Ta slovenski standard je istoveten z: EN ISO 24656:2022
ICS:
47.020.99 Drugi standardi v zvezi z Other standards related to
ladjedelništvom in shipbuilding and marine
konstrukcijami na morju structures
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 24656
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 47.020.99; 77.060
English Version
Cathodic protection of offshore wind structures (ISO
24656:2022)
Protection cathodique des structures éoliennes Kathodischer Korrosionsschutz von Offshore-
offshore (ISO 24656:2022) Windparkstrukturen (ISO 24656:2022)
This European Standard was approved by CEN on 6 May 2022.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24656:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 24656:2022) 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 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 24656:2022 has been approved by CEN as EN ISO 24656:2022 without any modification.
INTERNATIONAL ISO
STANDARD 24656
First edition
2022-05
Cathodic protection of offshore wind
structures
Protection cathodique des structures éoliennes en mer
Reference number
ISO 24656:2022(E)
ISO 24656:2022(E)
© ISO 2022
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 24656:2022(E)
Contents Page
Foreword . vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations .5
4.1 Symbols . 5
4.2 Abbreviations . 7
5 Competence of personnel .8
6 Structural considerations . 9
6.1 Structures to be protected . 9
6.2 Materials . 10
6.3 Corrosion protection strategy . 10
7 Cathodic protection criteria .15
7.1 Temporary protection . 15
7.2 Steel structures . . 16
7.3 Reinforced concrete structures . 17
8 Cathodic protection design .17
8.1 Objectives . 17
8.2 Design considerations . 18
8.2.1 General . 18
8.2.2 External cathodic protection . 19
8.2.3 Internal cathodic protection . 19
8.3 CP Design life . 20
8.4 Surface area considerations .20
8.4.1 General .20
8.4.2 Structure subdivision .20
8.5 Environmental factors . 21
8.5.1 General . 21
8.5.2 Seawater flow velocity . 21
8.5.3 Electrolyte resistivity .22
8.5.4 Seawater temperature . 22
8.5.5 Calcareous deposits . 22
8.6 Protection current demand .23
8.6.1 General .23
8.6.2 Calculation of current demand, external surfaces .23
8.6.3 Calculation of current demand, internal surfaces . 26
8.7 Electrical continuity and continuity bonds . 26
8.8 Current drains and interactions . 27
8.9 Installation considerations during design . 27
9 Galvanic anode systems .28
9.1 General .28
9.2 Anode current availability .28
9.3 Galvanic anode alloys .28
9.4 Anode selection . 29
9.5 Anode requirements . 30
9.6 Anode distribution . 31
10 Impressed current systems .32
10.1 General . 32
10.2 Design considerations . 33
iii
ISO 24656:2022(E)
10.2.1 General . 33
10.2.2 Resilience of impressed current CP system by design . 33
10.2.3 Current requirement of impressed current CP system .34
10.2.4 Impressed current CP system components .34
10.2.5 DC power source .34
10.2.6 Impressed current anodes .36
10.2.7 Reference electrodes . 37
10.2.8 Dielectric shields . 37
10.3 Installation of impressed current CP systems .38
10.4 Hybrid systems and temporary power for impressed current systems .39
10.5 Continuity bonds . 39
11 Cable systems .39
11.1 General .39
11.2 Cathodic protection DC cables .40
11.3 Inter-array and export AC cables . 41
12 Commissioning and surveys .43
12.1 Objectives . 43
12.2 Galvanic anode systems . 43
12.2.1 General . 43
12.2.2 Detailed external surveys .44
12.2.3 Detailed internal surveys .44
12.3 Permanent CP monitoring systems . 45
12.4 Impressed current systems . 45
13 CP surveying and monitoring . .46
13.1 Objectives .46
13.2 General considerations.46
13.3 Reference electrodes .48
13.4 Frequency of survey and monitoring .48
14 Retrofit cathodic protection systems .49
14.1 General considerations.49
14.2 Survey before retrofit.49
14.3 Retrofit for inadequate protection .50
14.4 Retrofit for structure life extension .50
14.5 All retrofits . 51
14.6 Equipment considerations . 52
15 Documentation .53
15.1 General .53
15.2 Design report . 53
15.2.1 General .53
15.3 Material specification requirements . 55
15.3.1 General . 55
15.3.2 Galvanic anodes . 55
15.3.3 Impressed current CP materials .56
15.4 Installation drawings and specifications . 59
15.5 As-built installation and commissioning report requirements . 59
15.6 Operation and maintenance requirements .60
16 Safety and cathodic protection .60
16.1 Objectives .60
16.2 Physical obstructions . 61
16.3 Protection against electric shock . 61
16.4 Gas evolution . 61
16.4.1 Hydrogen evolution . . 61
16.4.2 Chlorine evolution . 62
Annex A (informative) Environmental checklist .63
iv
ISO 24656:2022(E)
Annex B (normative) Method of using metocean data to calculate marked-up seawater flow
velocity .65
Annex C (informative) Guidance on cathodic protection current density requirement for
cathodic protection of wind offshore structures .78
Annex D (informative) Coatings and coating breakdown for CP design .86
Annex E (normative) Anode resistance and life calculation .90
Annex F (normative) Calculation of voltage drop down connection cables .97
Annex G (normative) Typical electrochemical characteristics for commonly used
impressed current anodes .99
Annex H (informative) Permanent monitoring system design process . 101
Annex I (informative) Cathodic protection modelling . 105
Bibliography . 108
v
ISO 24656:2022(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, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC
219, Cathodic protection, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
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.
vi
ISO 24656:2022(E)
Introduction
Cathodic protection (CP), possibly together with protective coating, is applied to protect the immersed
external surfaces of offshore wind farm structures and appurtenances from corrosion due to seawater
or seabed environments.
CP, possibly together with protective coating, can be applied to protect the internal flooded and seabed
and sediment exposed surfaces from corrosion.
The general principles of CP in seawater are detailed in ISO 12473.
CP involves the supply of sufficient direct current to the surfaces of the structure in order to reduce the
steel to electrolyte potential to values where corrosion is considered insignificant or acceptably low.
CP is designed to protect the submerged and buried areas of the structure from corrosion. The parts
that are not permanently immersed will not be permanently protected by the CP system.
This document introduces guidance for the use of available metocean data to
— assess the CP demand of immersed and frequently wetted areas
— determine seawater flow velocities to assess the CP design parameters
This is in addition to the primary use of the metocean data in structural design.
This document does not require the CP designer to be expert in metocean data; it gives guidance on data
which should be available from metocean specialists and which is required in the CP design process.
vii
INTERNATIONAL STANDARD ISO 24656:2022(E)
Cathodic protection of offshore wind structures
1 Scope
This document specifies the requirements for the external and internal cathodic protection for offshore
wind farm structures. It is applicable for structures and appurtenances in contact with seawater or
seabed environments. This document addresses:
— design and implementation of cathodic protection systems for new steel structures;
— assessment of residual life of existing cathodic protection systems;
— design and implementation of retrofit cathodic protection systems for improvement of the protection
level or for life extension of the protection;
— inspection and performance monitoring of cathodic protection systems installed on existing
structures, and
— guidance on cathodic protection of reinforced concrete structures.
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 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 12473, General principles of cathodic protection in seawater
EN 12496, Galvanic anodes for cathodic protection in seawater and saline mud
ISO 12696, Cathodic protection of steel in concrete
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
EN 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61000-1-2, Electromagnetic compatibility (EMC) — Part 1-2: General — Methodology for the
achievement of functional safety of electrical and electronic systems including equipment with regard to
electromagnetic phenomena
IEC 61400-24, Wind energy generation systems — Part 24: Lightning protection
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 https:// www .electropedia .org/
ISO 24656:2022(E)
3.1
atmospheric zone
zone located above the splash zone
3.2
buried zone
zone located under the seabed or expected scour level, whichever is lower
3.3
CP design life
time for which the CP is designed to protect the structure
Note 1 to entry: This may be different to the structure design life or structure service life.
3.4
doubler plate
plate welded onto a member to locally reinforce it or to isolate it from further welding work
3.5
electrolyte
medium in which electric current is transported by ions. In the context of this document, seawater or
seabed
3.6
frequently wetted zone
FWZ
water level, WL(t), plus significant wave height, H
mo
Note 1 to entry: See Annex B for details.
3.7
free board level
FBL
water level for floating structures
Note 1 to entry: For calculation of frequently wetted zone, it will replace WL(t)
3.8
HAT
highest astronomical tide
level of the highest astronomical tide
3.9
hybrid cathodic protection system
system comprising both impressed current and galvanic anodes
3.10
inspection
examination of equipment to determine its continued performance characteristics, whether undertaken
on a regular program basis or carried out as a simple operation
3.11
IR error
error in measured steel to electrolyte potential caused by the protection current or any other current
flowing through the resistive environment
3.12
jacket structure
multi-legged lattice braced structure
ISO 24656:2022(E)
3.13
J-tube
curved tubular conduit designed and installed on a structure to support and guide cables
3.14
LAT
lowest astronomical tide
level of the lowest astronomical tide
3.15
marine sediments
top layer of the seabed composed of water saturated solid materials of various densities
3.16
metocean data
meteorological and oceanographic data, often given as hourly statistics
3.17
monitoring
activity continuously on-going or sporadically undertaken at fixed locations to determine the
performance of a CP system or parameters related to the performance
Note 1 to entry: Typically, monitoring utilizes fixed sensors, the data from which can be data logged.
3.18
monopile
foundation element driven or drilled into the seabed to support a transition piece and/or tower
3.19
over-polarization
occurrence in which the structure to electrolyte potentials are more negative than those required for
satisfactory cathodic protection
Note 1 to entry: Over-polarization provides no useful function and might even cause damage to the structure
3.20
owner
structure owner, or developer or operator, all or any of which may have responsibility for matters
related to corrosion protection
3.21
primary steel
primary load carrying elements (monopile, jacket, hull and other steel structures)
3.22
re-polarization
situation where the steel is polarized after a depolarization event
3.23
retrofit cathodic protection
provision of CP equipment, either as a complete or a partial system, to an existing structure either to
remedy CP performance deficiencies or to extend the CP system life
3.24
salinity
quantity of inorganic salts dissolved in the seawater
Note 1 to entry: The standardised measurement is based on the determination of the electrical conductivity of
the seawater.
Note 2 to entry: Salinity is expressed in grams per kilogramme (g/kg) or as parts per thousand (ppt or ‰).
ISO 24656:2022(E)
3.25
scour
removal of seabed soils by sea currents and waves or caused by structural elements interrupting the
natural flow regime above the sea floor
3.26
seabed
interface between seawater and solids of the buried zone (3.2) including the marine sediments (3.15)
3.27
secondary steel
steel which is not primary steel, hence used for access (boat landing, ladders, decks and support for
equipment)
3.28
shallow water
water of such depth that surface waves are noticeably affected by bottom topography
[33]
Note 1 to entry: Typically, this implies a water depth equivalent to half the wavelength . For all practical
purposes in this document, it is understood as depth less than −30 m LAT
3.29
significant wave height
H
mo
mean level of the third largest waves in open sea
3.30
splash zone
external region of support structure that is frequently wetted due to the wave and tidal variations. A
[15]
more detailed definition of splash zone is given in IEC 61400-3-1 . In this document the frequently
wetted zone is included as the upper boundary to which current demand for CP shall be included
3.31
structure service life
anticipated life of the windfarm structure.
Note 1 to entry: This includes a period for storage, transport, installation, operating the wind farm and a possible
period for decommissioning
3.32
suction bucket
foundation element that is sucked into the seabed
3.33
surveying
process of carrying out inspection using a defined procedure
Note 1 to entry: In this document surveying is also used to describe the process of taking cathodic protection
measurements, not using fixed and data logged sensors, but using a defined procedure
3.34
tidal zone
zone located between LAT and HAT
3.35
transition piece
intermediate structure between the monopile and the tower
ISO 24656:2022(E)
3.36
wave crest and trough
height of seawater above and depth of below still water level due to waves
Note 1 to entry: See Figure 1 below.
a) Tides b) Tide+storm surge=still water c) Wave profile superimposed on water level
level
Key
Key to distance elevation Key line types
1 lowest astronomical tide 6 tide associated with storm (shown positive seafloor
(LAT) but may be positive or negative)
2 mean sea level (MSL) 7 storm surge (shown positive but may be tide levels
positive or negative)
3 highest astronomical tide 8 still water (or "storm water") level surge or surge+tide
(HAT) levels
4 tidal range 9 crest elevation wave profile
5 tidal datum (commonly LAT 0 trough elevation
or MSL but may be other)
[10]
Figure 1 — Water depth, tides and storm surges, from ISO 19901-1
4 Symbols and abbreviations
4.1 Symbols
A Area, m
C Anode cross section periphery, m
c Coating degradation, %
ISO 24656:2022(E)
ΔU Driving potential, V
f Coating breakdown factor
c
I Current, A
I Initial current output of an individual galvanic anode material, A
anode(initial)
I Final current output of an individual galvanic anode material, A
anode(final)
I Maximum protection current demand for a CP zone, A
max
I Total current required for polarization of the structure, A
total(initial)
I Total current required for re-polarization of the structure, A
total(final)
J Current density, A/m
L Anode body length, m
L Anode initial length, m
initial
L Anode final (or end of life) length, m
final
N Number of anodes
Q Practical electrochemical capacity for the anode alloy in the environment considered, Ah/kg
ρ Resistivity of an electrolyte, Ωm. In this document resistivity may be of an electrolyte (sea
or seabed) or a conductor material
R Anode resistance to remote earth, Ω. In the context of this document, remote earth will
a
be in seawater or seabed
r Anode radius, m
R Circuit resistance, Ω
S Arithmetic mean of anode length and width, m
T Temperature, °C
T Effective lifetime of the anode, years
anode
T Required design life, years
design
U Flow velocity (m/s)
u Utilisation factor for CP design calculations
V Initial net volume of anode alloy (excluding the steel insert), m
initial
V Volume of the insert only within the anode body, m
insert
V Final (or end of life) net volume of anode alloy, m
final
V Overall volume of the anode body including that portion of the insert only within the
gross
anode body, m
m Net mass of an individual galvanic anode material, kg
anode
m Minimum total net mass of galvanic anode material, kg
total
ISO 24656:2022(E)
4.2 Abbreviations
ABS Area Below Seabed
AC Alternating Current
BEM Boundary Element Method
CA Corrosion Allowance
CP Cathodic Protection
CP design life Cathodic Protection design life
CPS Cable Protection System
CSPE Chlorosulfonated Polyethylene; alternatively abbreviated to CSP
DC Direct Current
DO Dissolved oxygen
EMF Electromotive Force
EPR Ethylene Propylene Rubber
ER Electrical Resistance
FAT Factory Acceptance Test
FBL Free Board Level
FEM Finite Element Method
FWZ Frequently Wetted Zone
GACP Galvanic Anode Cathodic Protection
HAT Highest Astronomical Tide
HDPE High Density Polyethylene
HMMPE High Molecular Mass Polyethylene
HSC Hydrogen Induced Stress Cracking
ICCP Impressed Current Cathodic Protection
IEC International Electrotechnical Commission
IMCA International Marine Contractors Association
IP Ingress Protection Rating
ISO International Organization for Standardization
ITP Inspection and Test Plan
LAT Lowest Astronomical Tide
MIC Microbially Influenced Corrosion
ISO 24656:2022(E)
MMO Mixed Metal Oxide
MP Monopile
MSL Mean Sea Level
MTL Mean Tide Level
MWL Mean Water Level
MDFT Minimum Dry Film Thickness
NACE National Association of Corrosion Engineers
NDFT Nominal Dry Film Thickness
PTFE Polytetrafluoroethylene
PVDF Polyvinylidene Fluoride
PVC Poly vinyl chloride
RCD Residual Current Device
RMS Root Mean Square
ROV Remotely Operated Vehicle
S-N Stress versus Number of cycles
SMS Specified Minimum Yield Strength
TP Transition Piece
TR Transformer Rectifier
WTG Wind Turbine Generator
XLPE Cross-linked Polyethylene
5 Competence of personnel
Personnel who undertake the design (the CP designer), supervision of installation, commissioning,
supervision of operation, inspections, measurements, monitoring and supervision of maintenance of
CP systems shall have the appropriate level of competence for the tasks undertaken. This competence
should be independently assessed and documented. The CP designer shall be competent to assess and
determine the appropriate input parameters (such as steel current density, anode potential and anode
electrochemical capacity) for the CP design based upon the type of structure, its exposure and the
metocean data.
[7]
ISO 15257 defines a method which may be utilized for assessing and c
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...