SFS-EN ISO 24656:2022:en

Soveltamisala

Suomenkielistä soveltamisalaa ei ole saatavissa.

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.

Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).

Sisällysluettelo

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations

4.1 Symbols
4.2 Abbreviations

5 Competence of personnel
6 Structural considerations

6.1 Structures to be protected
6.2 Materials
6.3 Corrosion protection strategy

7 Cathodic protection criteria

7.1 Temporary protection
7.2 Steel structures
7.3 Reinforced concrete structures

8 Cathodic protection design

8.1 Objectives
8.2 Design considerations
8.3 CP Design life
8.4 Surface area considerations
8.5 Environmental factors
8.6 Protection current demand
8.7 Electrical continuity and continuity bonds
8.8 Current drains and interactions
8.9 Installation considerations during design

9 Galvanic anode systems

9.1 General
9.2 Anode current availability
9.3 Galvanic anode alloys
9.4 Anode selection
9.5 Anode requirements
9.6 Anode distribution

10 Impressed current systems

10.1 General
10.2 Design considerations
10.3 Installation of impressed current CP systems
10.4 Hybrid systems and temporary power for impressed current systems
10.5 Continuity bonds

11 Cable systems

11.1 General
11.2 Cathodic protection DC cables
11.3 Inter-array and export AC cables

12 Commissioning and surveys

12.1 Objectives
12.2 Galvanic anode systems
12.3 Permanent CP monitoring systems
12.4 Impressed current systems

13 CP surveying and monitoring

13.1 Objectives
13.2 General considerations
13.3 Reference electrodes
13.4 Frequency of survey and monitoring

14 Retrofit cathodic protection systems

14.1 General considerations
14.2 Survey before retrofit
14.3 Retrofit for inadequate protection
14.4 Retrofit for structure life extension
14.5 All retrofits
14.6 Equipment considerations

15 Documentation

15.1 General
15.2 Design report
15.3 Material specification requirements
15.4 Installation drawings and specifications
15.5 As-built installation and commissioning report requirements
15.6 Operation and maintenance requirements

16 Safety and cathodic protection

16.1 Objectives
16.2 Physical obstructions
16.3 Protection against electric shock
16.4 Gas evolution

Annex A Environmental checklist (informative)
Annex B Method of using metocean data to calculate marked-up seawater flow velocity (normative)
Annex C Guidance on cathodic protection current density requirement for cathodic protection of wind offshore structures (informative)
Annex D Coatings and coating breakdown for CP design (informative)
Annex E Anode resistance and life calculation (normative)
Annex F Calculation of voltage drop down connection cables (normative)
Annex G Typical electrochemical characteristics for commonly used impressed current anodes (normative)
Annex H Permanent monitoring system design process (informative)
Annex I Cathodic protection modelling (informative)

Bibliography

Näytä kaikki

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations

4.1 Symbols
4.2 Abbreviations

5 Competence of personnel
6 Structural considerations

6.1 Structures to be protected
6.2 Materials
6.3 Corrosion protection strategy

7 Cathodic protection criteria

7.1 Temporary protection
7.2 Steel structures
7.3 Reinforced concrete structures

8 Cathodic protection design

8.1 Objectives
8.2 Design considerations
8.3 CP Design life
8.4 Surface area considerations
8.5 Environmental factors
8.6 Protection current demand
8.7 Electrical continuity and continuity bonds
8.8 Current drains and interactions
8.9 Installation considerations during design

9 Galvanic anode systems

9.1 General
9.2 Anode current availability
9.3 Galvanic anode alloys
9.4 Anode selection
9.5 Anode requirements
9.6 Anode distribution

10 Impressed current systems

10.1 General
10.2 Design considerations
10.3 Installation of impressed current CP systems
10.4 Hybrid systems and temporary power for impressed current systems
10.5 Continuity bonds

11 Cable systems

11.1 General
11.2 Cathodic protection DC cables
11.3 Inter-array and export AC cables

12 Commissioning and surveys

12.1 Objectives
12.2 Galvanic anode systems
12.3 Permanent CP monitoring systems
12.4 Impressed current systems

13 CP surveying and monitoring

13.1 Objectives
13.2 General considerations
13.3 Reference electrodes
13.4 Frequency of survey and monitoring

14 Retrofit cathodic protection systems

14.1 General considerations
14.2 Survey before retrofit
14.3 Retrofit for inadequate protection
14.4 Retrofit for structure life extension
14.5 All retrofits
14.6 Equipment considerations

15 Documentation

15.1 General
15.2 Design report
15.3 Material specification requirements
15.4 Installation drawings and specifications
15.5 As-built installation and commissioning report requirements
15.6 Operation and maintenance requirements

16 Safety and cathodic protection

16.1 Objectives
16.2 Physical obstructions
16.3 Protection against electric shock
16.4 Gas evolution

Annex A Environmental checklist (informative)
Annex B Method of using metocean data to calculate marked-up seawater flow velocity (normative)
Annex C Guidance on cathodic protection current density requirement for cathodic protection of wind offshore structures (informative)
Annex D Coatings and coating breakdown for CP design (informative)
Annex E Anode resistance and life calculation (normative)
Annex F Calculation of voltage drop down connection cables (normative)
Annex G Typical electrochemical characteristics for commonly used impressed current anodes (normative)
Annex H Permanent monitoring system design process (informative)
Annex I Cathodic protection modelling (informative)

Bibliography

Tuoteryhmä(t)

47.020.99 Muut laivanrakennukseen ja meriteknisiin rakenteisiin liittyvät standardit »
77.060 Metallien korroosio »

Sidokset

Velvoittavat viittaukset

EN 12496:2013 Galvanic anodes for cathodic protection in seawater and saline mud
EN 60529:1991 Sähkölaitteiden kotelointiluokat (IP-koodi)
IEC 61000-1-2:2016 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

Tekninen komitea

CEN/TC 219 Cathodic protection »

Vahvistuspäivä

10.06.2022

Julkaisupäivä

14.06.2022

Painos

1

Sivumäärä

114

Julkaisun kieli

englanti