I.S. EN ISO 21857:2021
Current
The latest, up-to-date edition.
Petroleum, petrochemical and natural gas industries - Prevention of corrosion on pipeline systems influenced by stray currents (ISO 21857:2021)
Hardcopy , PDF
English
31-10-2021
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations and symbols
5 Information exchange and co-operation
6 Common sources of interference that can affect corrosion
7 Identification and measurement of stray current interference
8 Acceptance criteria for DC interference
9 Reduction of DC stray current interference
10 Modifications to the interfered structure
11 Inspection and maintenance
Annex A (informative) Use of current probes to evaluate fluctuating stray current interference on cathodically protected structures
Annex B (informative) Determining the relevant position for placing reference electrodes, coupons and probes in case of any conductive coupling caused by stray currents
Annex C (informative) Operating principles of electrical resistance probes
Annex D (informative) Geomagnetic interference
Annex E (informative) High voltage direct current interference
Annex F (informative) Alternating Current Interference
Annex G (informative) Tidal Effects
Annex H (informative) Photovoltaic interference
Annex I (informative) Modelling the effects of stray current interference on cathodically protected pipelines
Annex J (informative) Assessment of the corrosion risk for steel in concrete or for cathodically protected structures under time variant interference conditions
Annex K (informative) Principles of anodic and cathodic interference
Bibliography
This document establishes the general principles for the evaluation and minimization of the effects of stray current corrosion on external surfaces of buried or immersed pipeline systems caused by AC and DC electrical interference.
Committee |
ISO/TC 67
|
DocumentType |
Standard
|
Pages |
84
|
ProductNote |
The date of any NSAI previous adoption may not match the date of its original CEN/CENELEC document.
|
PublisherName |
National Standards Authority of Ireland
|
Status |
Current
|
Standards | Relationship |
EN ISO 21857:2021 | Identical |
ISO 21857:2021 | Identical |
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