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EN 50162:2004

Current
Current

The latest, up-to-date edition.

Protection against corrosion by stray current from direct current systems
Published date

19-08-2004

Introduction
1 Scope
2 Normative references
3 Definitions
4 Information exchange and co-operation
5 Identification and measurement of stray current
  interference
  5.1 Identification
  5.2 Measurement
6 Criteria for stray-current interference
  6.1 Anodic interference
  6.2 Cathodic interference
7 Reduction of stray current interference - Modifications
  to current source
  7.1 General
  7.2 Principles
  7.3 Direct current systems at industrial sites
  7.4 Direct current systems at ports
  7.5 Direct current communication systems
  7.6 Direct current traction systems
  7.7 High-voltage direct current transmission systems
  7.8 Cathodic protection systems
  7.9 Interference caused by electrical drainage (secondary
      interference)
8 Reduction of stray current interference - Modifications
  to the interfered structure
  8.1 General
  8.2 Design prerequisites
  8.3 Installation of mitigation devices
9 Inspection and maintenance
Annex A (informative) Stray current corrosion, potential
        measurements and IR-drop
Annex B (informative) Principles of anodic and cathodic
        interference
Annex C (informative) Criteria for maximum acceptable
        levels of potential shift delta U of anodic
        interference
Annex D (informative) The use of current probes to evaluate
        fluctuating stray current interference on cathodically
        protected structures
Annex E (informative) Interference situations and protection
        techniques
Bibliography

This standard establishes the general principles to be adopted to minimize the effects of stray current corrosion caused by direct-current (d.c.) on buried or immersed metal structures.The standard is intended to offer guidance for:–the design of direct current systems which may produce stray currents;–the design of metal structures, which are to be buried or immersed and–which may be subject to stray current corrosion;–the selection of appropriate protection measures.The standard mainly deals with external stray current corrosion on buried or immersed structures.However stray current corrosion may also occur internally in systems containing an electrolyte e.g. near insulating joints or high resistance pipe joints in a water pipeline.These situations are not dealt with in detail in this standard but principles and measures described here are generally applicable for minimizing the interference effects.Stray currents may also cause other effects such as overheating. These are not covered in this standard.D.C. systems that can cause currents to flow in the earth or any other electrolyte, whether intentional or unintentional, include:–d.c. traction systems;–trolley bus systems;–d.c. power systems;–d.c. equipment at industrial sites;–d.c. communication systems;–cathodic protection systems;–high voltage d.c. (HVDC) transmission systems;–d.c. track circuit signalling systems. For stray currents from traction systems EN 50122-2 gives requirements for minimizing their production and for the effects within the railroad.Systems which may be affected by stray currents include buried or immersed metal structures such as:a)pipelines;b)metal sheathed cables;c)tanks and vessels;d)earthing systems;e)steel reinforcement in concrete;f)steel piling.An affected structure carrying stray currents, e.g. a pipeline or cable may itself affect other nearby structures (see Clause 8).This standard does not address the effect of a.c. stray current. Where a.c. stray current is suspected, care should be taken when taking measurements on any components due to risk of large induced voltages. If a.c. stray current interference is present the criteria described in this standard will not apply.

Committee
CLC/TC 9X
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Current

Standards Relationship
VDE 0150 : 2005 Identical
NF EN 50162 : 2005 Identical
DIN EN 50162 : 2005 Identical
NBN EN 50162 : 2005 Identical
NEN EN 50162 : 2004 Identical
SN EN 50162 : 2004 Identical
PN EN 50162 : 2006 Identical
BS EN 50162:2004 Identical
UNE-EN 50162:2005 Identical
CEI EN 50162 : 2005 Identical
I.S. EN 50162:2004 Identical
SANS 50162 : 1ED 2010 Identical
SANS 50162:2010(R2019) Identical

17/30331222 DC : 0 BS EN 16432-1 - RAILWAY APPLICATIONS - BALLASTLESS TRACK SYSTEMS - PART 1: GENERAL REQUIREMENT
05/30135048 DC : DRAFT JUN 2005 EN 15257 - CATHODIC PROTECTION - COMPETENCE LEVELS AND CERTIFICATION OF CATHODIC PROTECTION PERSONNEL
12/30256971 DC : 0 BS EN 12473 - GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEA WATER
I.S. EN ISO 13174:2012 CATHODIC PROTECTION OF HARBOUR INSTALLATIONS (ISO 13174:2012)
PREN 16299 : DRAFT 2011 CATHODIC PROTECTION OF EXTERNAL SURFACES OF ABOVE GROUND STORAGE TANK BASES IN CONTACT WITH SOIL OR FOUNDATIONS
DIN EN ISO 13174:2013-05 CATHODIC PROTECTION OF HARBOUR INSTALLATIONS (ISO 13174:2012)
UNI EN ISO 13174 : 2013 CATHODIC PROTECTION OF HARBOUR INSTALLATIONS
ISO 15589-1:2015 Petroleum, petrochemical and natural gas industries — Cathodic protection of pipeline systems — Part 1: On-land pipelines
PREN 12473 : DRAFT 2012 GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEA WATER
DIN EN 12007-3:2015-07 GAS INFRASTRUCTURE - PIPELINES FOR MAXIMUM OPERATING PRESSURE UP TO AND INCLUDING 16 BAR - PART 3: SPECIFIC FUNTIONAL REQUIREMENTS FOR STEEL
ISO 13174:2012 Cathodic protection of harbour installations
BS EN 1537:2013 Execution of special geotechnical works. Ground anchors
DIN EN 1537:2001-01 EXECUTION OF SPECIAL GEOTECHNICAL WORKS - GROUND ANCHORS
DIN EN 14505:2005-07 Cathodic protection of complex structures
EN 12473:2014 General principles of cathodic protection in seawater
BS EN 16299:2013 Cathodic protection of external surfaces of above ground storage tankbases in contact with soil or foundations
I.S. EN 15257:2006 CATHODIC PROTECTION - COMPETENCE LEVELS AND CERTIFICATION OF CATHODIC PROTECTION PERSONNEL
11/30248021 DC : 0 AEROSPACE SERIES - COPPER ALLOY CUBE 1.9 - SOLUTION TREATED, COLD WORKED TO [1/2] HARD AND PRECIPITATION TREATED - BAR - 5 MM <= A OR D <= 190 MM - R[M] >= 1220 MPA
BS ISO 15589-1 : 2015 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - CATHODIC PROTECTION OF PIPELINE SYSTEMS - PART 1: ON-LAND PIPELINES
BS EN 16222:2012 Cathodic protection of ship hulls
11/30234723 DC : 0 BS EN 16299 - CATHODIC PROTECTION OF EXTERNAL SURFACES OF ABOVE GROUND STORAGE TANK BASES IN CONTACT WITH SOIL OR FOUNDATIONS
12/30247714 DC BS IEC 62128-2. Railway applications. Fixed installations. Electrical safety, earthing and the return circuit. Part 2. Provisions against the effects of stray currents caused by d.c. traction systems
BS EN 50122-2:2010 Railway applications. Fixed installations. Electrical safety, earthing and the return circuit Provisions against the effects of stray currents caused by d.c. traction systems
CEI EN 50122-2 : 2012 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - ELECTRICAL SAFETY, EARTHING AND THE RETURN CIRCUIT - PART 2: PROVISIONS AGAINST THE EFFECTS OF STRAY CURRENTS CAUSED BY D.C. TRACTION SYSTEMS
DIN EN 1537:2014-07 EXECUTION OF SPECIAL GEOTECHNICAL WORKS - GROUND ANCHORS
DIN EN 12473:2014-07 GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEAWATER
DIN EN 13636:2004-10 Cathodic protection of buried metallic tanks and related piping; German version EN 13636:2004
I.S. EN 12473:2014 GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEA WATER
I.S. EN 1537:2013 EXECUTION OF SPECIAL GEOTECHNICAL WORKS - GROUND ANCHORS
DIN EN 12473:2000-04 GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEAWATER
I.S. EN 12007-3:2015 GAS INFRASTRUCTURE - PIPELINES FOR MAXIMUM OPERATING PRESSURE UP TO AND INCLUDING 16 BAR - PART 3: SPECIFIC FUNCTIONAL REQUIREMENTS FOR STEEL
I.S. EN ISO 15589-1:2017 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - CATHODIC PROTECTION OF PIPELINE SYSTEMS - PART 1: ON-LAND PIPELINES (ISO 15589-1:2015)
10/30234732 DC : 0 BS EN ISO 13174 - CATHODIC PROTECTION OF HARBOUR INSTALLATIONS
DIN EN 16432-1:2015-04 (Draft) RAILWAY APPLICATIONS - BALLASTLESS TRACK SYSTEMS - PART 1: GENERAL REQUIREMENTS
DIN EN ISO 15257 E : 2017 CATHODIC PROTECTION - COMPETENCE LEVELS OF CATHODIC PROTECTION PERSONS - BASIS FOR A CERTIFICATION SCHEME (ISO 15257:2017)
14/30271613 DC : 0 BS ISO 15257 - CATHODIC PROTECTION - COMPETENCE LEVELS OF CATHODIC PROTECTION PERSONS - BASIS FOR CERTIFICATION SCHEME
UNE-EN 50122-2:2011 Railway applications - Fixed installations - Electrical safety, earthing and the return circuit -- Part 2: Provisions against the effects of stray currents caused by d.c. traction systems
ISO 12473:2017 General principles of cathodic protection in seawater
17/30319994 DC : 0 BS ISO 20313 - SHIPS AND MARINE TECHNOLOGY - CATHODIC PROTECTION OF SHIPS
DIN EN ISO 15257:2016-06 (Draft) CATHODIC PROTECTION - COMPETENCE LEVELS OF CATHODIC PROTECTION PERSONS - BASIS FOR A CERTIFICATION SCHEME (ISO 15257:2017)
BS EN ISO 13174:2012 Cathodic protection of harbour installations
15/30314907 DC : 0 BS ISO 12473 - GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEAWATER
DIN EN 16432-1 E : 2017 RAILWAY APPLICATIONS - BALLASTLESS TRACK SYSTEMS - PART 1: GENERAL REQUIREMENTS
I.S. EN 16222:2012 CATHODIC PROTECTION OF SHIP HULLS
PREN 12954 : DRAFT 2017 GENERAL PRINCIPLES OF CATHODIC PROTECTION OF BURIED OR IMMERSED ONSHORE METALLIC STRUCTURES
UNI EN 16299 : 2013 CATHODIC PROTECTION OF EXTERNAL SURFACES OF ABOVE GROUND STORAGE TANK BASES IN CONTACT WITH SOIL OR FOUNDATIONS
DIN EN 15257:2007-03 CATHODIC PROTECTION - COMPETENCE LEVELS AND CERTIFICATION OF CATHODIC PROTECTION PERSONNEL
ISO 15257:2017 Cathodic protection — Competence levels of cathodic protection persons — Basis for a certification scheme
EN ISO 15589-1:2017 Petroleum, petrochemical and natural gas industries - Cathodic protection of pipeline systems - Part 1: On-land pipelines (ISO 15589-1:2015, Corrected version 2020-11)
EN 16299:2013 Cathodic protection of external surfaces of above ground storage tank bases in contact with soil or foundations
UNI EN 12473 : 2014 GENERAL PRINCIPLES OF CATHODIC PROTECTION IN SEAWATER
UNI EN 1537 : 2013 EXECUTION OF SPECIAL GEOTECHNICAL WORKS - GROUND ANCHORS
UNI EN 15257 : 2007 CATHODIC PROTECTION - COMPETENCE LEVELS AND CERTIFICATION OF CATHODIC PROTECTION PERSONNEL
UNI EN 16222 : 2012 CATHODIC PROTECTION OF SHIP HULLS
I.S. EN 16299:2013 CATHODIC PROTECTION OF EXTERNAL SURFACES OF ABOVE GROUND STORAGE TANK BASES IN CONTACT WITH SOIL OR FOUNDATIONS
NACE 01110 : 0 STRAY-CURRENT-INDUCED CORROSION IN REINFORCED AND PRESTRESSED CONCRETE STRUCTURES
IEC 62128-2:2013 Railway applications - Fixed installations - Electrical safety, earthing and the return circuit - Part 2: Provisions against the effects of stray currents caused by d.c. traction systems
08/30165463 DC : DRAFT MAY 2008 BS EN 50122-2 - RAILWAY APPLICATIONS - FIXED INSTALLATIONS - ELECTRICAL SAFETY, EARTHING AND BONDING - PART 2: PROVISIONS AGAINST THE EFFECTS OF STRAY CURRENTS CAUSED BY D.C. TRACTION SYSTEMS
ISO 20313:2018 Ships and marine technology — Cathodic protection of ships
UNE-EN 16299:2013 Cathodic protection of external surfaces of above ground storage tank bases in contact with soil or foundations
I.S. EN 50122-2:2010 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - ELECTRICAL SAFETY, EARTHING AND THE RETURN CIRCUIT - PART 2: PROVISIONS AGAINST THE EFFECTS OF STRAY CURRENTS CAUSED BY D.C. TRACTION SYSTEMS
17/30346281 DC : 0 BS EN 12954 - GENERAL PRINCIPLES OF CATHODIC PROTECTION OF BURIED OR IMMERSED ONSHORE METALLIC STRUCTURES
DIN EN 14505 E : 2005 CATHODIC PROTECTION OF COMPLEX STRUCTURES
09/30205182 DC : 0 BS EN 50310 - APPLICATION OF EQUIPOTENTIAL BONDING AND EARTHING IN BUILDINGS WITH INFORMATION TECHNOLOGY EQUIPMENT
05/30133440 DC : DRAFT MAY 2005 EN 50310 ED 2 - APPLICATION OF EQUIPOTENTIAL BONDING AND EARTHING IN BUILDINGS WITH INFORMATION TECHNOLOGY EQUIPMENT
UNE-EN 12473:2014 General principles of cathodic protection in seawater
DIN EN 15257 E : 2007 CATHODIC PROTECTION - COMPETENCE LEVELS AND CERTIFICATION OF CATHODIC PROTECTION PERSONNEL
17/30326406 DC : 0 BS EN 17168 - RAILWAY APPLICATIONS - PLATFORM BARRIER SYSTEMS
BS EN 12007-3:2000 Gas supply systems. Pipelines for maximum operating pressure up to and including 16 bar Specific functional recommendations for steel
BS EN 13636:2004 Cathodic protection of buried metallic tanks and related piping
UNE-EN 12007-3:2015 Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 3: Specific functional requirements for steel
EN 14505:2005 Cathodic protection of complex structures
EN 16432-1:2017 Railway applications - Ballastless track systems - Part 1: General requirements
EN 1537:2013 Execution of special geotechnical works - Ground anchors
EN 16222:2012 Cathodic protection of ship hulls
EN 15257:2006 Cathodic protection - Competence levels and certification of cathodic protection personnel
EN ISO 15257:2017 Cathodic protection - Competence levels of cathodic protection persons - Basis for certification scheme (ISO 15257:2017)
EN 13636:2004 Cathodic protection of buried metallic tanks and related piping
BS EN 16432-1:2017 Railway applications. Ballastless track systems General requirements
12/30259982 DC : 0 BS EN 16432-1 - RAILWAY APPLICATIONS - BALLASTLESS TRACK SYSTEMS - PART 1: GENERAL REQUIREMENTS
BS EN ISO 15257:2017 Cathodic protection. Competence levels of cathodic protection persons Basis for certification scheme
NF EN 50122-2 : 2011 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - ELECTRICAL SAFETY, EARTHING AND THE RETURN - PART 2: PROVISIONS AGAINST THE EFFECTS OF STRAY CURRENTS CAUSED BY D.C - TRACTION SYSTEMS
I.S. EN 16432-1:2017 RAILWAY APPLICATIONS - BALLASTLESS TRACK SYSTEMS - PART 1: GENERAL REQUIREMENTS
UNE-EN 16222:2013 Cathodic protection of ship hulls
I.S. EN ISO 15257:2017 CATHODIC PROTECTION - COMPETENCE LEVELS OF CATHODIC PROTECTION PERSONS - BASIS FOR CERTIFICATION SCHEME (ISO 15257:2017)
BS EN ISO 15589-1:2017 Petroleum, petrochemical and natural gas industries. Cathodic protection of pipeline systems On-land pipelines
BS EN 14505:2005 Cathodic protection of complex structures
BS EN 15257:2006 Cathodic protection. Competence levels and certification of cathodic protection personnel
BS EN 12473:2014 General principles of cathodic protection in seawater
EN 12007-3:2015 Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 3: Specific functional requirements for steel
EN ISO 13174:2012 Cathodic protection of harbour installations (ISO 13174:2012)
DIN EN 16432-1:2017-09 RAILWAY APPLICATIONS - BALLASTLESS TRACK SYSTEMS - PART 1: GENERAL REQUIREMENTS
EN 50122-2:2010 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - ELECTRICAL SAFETY, EARTHING AND THE RETURN CIRCUIT - PART 2: PROVISIONS AGAINST THE EFFECTS OF STRAY CURRENTS CAUSED BY D.C. TRACTION SYSTEMS
DIN EN 16299:2013-06 CATHODIC PROTECTION OF EXTERNAL SURFACES OF ABOVE GROUND STORAGE TANK BASES IN CONTACT WITH SOIL OR FOUNDATIONS
DIN EN 16222:2012-12 Cathodic protection of ship hulls

EN 50122-2:2010 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - ELECTRICAL SAFETY, EARTHING AND THE RETURN CIRCUIT - PART 2: PROVISIONS AGAINST THE EFFECTS OF STRAY CURRENTS CAUSED BY D.C. TRACTION SYSTEMS
EN 12954 : 2001 CATHODIC PROTECTION OF BURIED OR IMMERSED METALLIC STRUCTURES - GENERAL PRINCIPLES AND APPLICATION FOR PIPELINES
EN ISO 8044:2015 Corrosion of metals and alloys - Basic terms and definitions (ISO 8044:2015)
EN 13509 : 2003 CATHODIC PROTECTION MEASUREMENT TECHNIQUES
IEC 60050-826:2004 International Electrotechnical Vocabulary (IEV) - Part 826: Electrical installations
EN 12499:2003/AC:2006 INTERNAL CATHODIC PROTECTION OF METALLIC STRUCTURES

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