Protection against corrosion by stray current from direct current systems

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.

Schutz gegen Korrosion durch Streuströme aus Gleichstromanlagen

Protection contre la corrosion due aux courants vagabonds des systèmes à courant continu

Železniške naprave – Zaščita proti koroziji zaradi učinkovanja blodečih tokov pri enosmernih tokovnih sistemih

General Information

Status
Published
Publication Date
18-Aug-2004
Current Stage
9093 - Decision to confirm - Review Enquiry
Completion Date
03-Nov-2021

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SLOVENSKI SIST EN 50162:2005

STANDARD
december 2005
Železniške naprave – Zaščita proti koroziji zaradi učinkovanja blodečih tokov
pri enosmernih tokovnih sistemih
Protection against corrosion by stray current from direct current systems
ICS 29.020; 77.060 Referenčna številka
SIST EN 50162:2005(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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EUROPEAN STANDARD EN 50162
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2004

ICS 29.020; 77.060


English version


Protection against corrosion by stray current
from direct current systems


Protection contre la corrosion  Schutz gegen Korrosion
due aux courants vagabonds durch Streuströme aus
des systèmes à courant continu Gleichstromanlagen






This European Standard was approved by CENELEC on 2004-05-01. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50162:2004 E

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EN 50162:2004 - 2 -
Foreword
This European Standard has been prepared by CENELEC BTTF 114-1, Protection against corrosion
by stray current from direct current systems.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50162 on 2004-05-01.
The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical national
standard or by endorsement (dop) 2005-05-01
- latest date by which the national standards
conflicting with the EN have to be withdrawn (dow) 2007-05-01

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- 3 - EN 50162:2004

Contents
Introduction .5
1 Scope .6
2 Normative references.7
3 Definitions.7
4 Information exchange and co-operation.8
5 Identification and measurement of stray current interference.8
5.1 Identification.8
5.2 Measurement .9
6 Criteria for stray-current interference .10
6.1 Anodic interference .10
6.2 Cathodic interference.10
7 Reduction of stray current interference – Modifications to current source.11
7.1 General .11
7.2 Principles.
...

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