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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-Windparkbauwerken (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

Status
Published
Publication Date
31-May-2022
Withdrawal Date
30-Dec-2022
ICS
47.020.99 - Other standards related to shipbuilding and marine structures
77.060 - Corrosion of metals
Technical Committee
CEN/TC 219 - Cathodic protection (provisional)
Drafting Committee
CEN/TC 219/WG 3 - Cathodic protection of steel structures in sea-water
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
01-Jun-2022
Completion Date
01-Jun-2022
Ref Project
SIST EN ISO 24656:2022 - Cathodic protection of offshore wind structures (ISO 24656:2022)

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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
...

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