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BS EN 12954:2019 pdf free

BS EN 12954:2019 pdf free.General principles of cathodic protection of buried or immersed onshore metallic structures.
For structures that cannot be electrically isolated from neighbouring influencing structures, It may be impossible to use the criteria defined in the present document. In this case, EN 14505 will be applied (see 9.4 “Electrical continuity/discontinuity”).
NOTE To assist in forming a decision whether or not to apply cathodic protection the corrosion likelihood can be evaluated using informative Annex A which summarizes the requirements of EN 1250 1-1 12J and
EN 1250 1-2 (3j.
Cathodic protection of structures immersed in seawater or brackish waters is covered by EN 12473 and
a series of standards more specific for various applications.
Cathodic protection for reinforced concrete structures is covered by EN ISO 12696.
This document is applicable in conjunction with:
— EN ISO 15589-1 for application for buried or immersed cathodically protected pipelines,
— EN 50162 to manage d.c. stray currents,
— EN ISO 18086 to manage corrosion due to a.c. interference from high voltage power sources and a.c. traction systems,
— EN 13509 for cathodic protection measurement techniques
— EN 50443 to manage protection for touch and step voltage.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (Including any amendments) applies.
EN 12496, Galvanicanodesfor cathodic protection in seawater andsaline mud
EN 13509, Cathodic protection measurement techniques
EN 14505, Cathodic protection of complex structures
EN 50162, Protection against corrosion by stray current from direct current systems
EN 60079-10-1, Explosive atmospheres – Part 10-1: Classification of areas- Explosive gas atmospheres (IEC 60079-10-I)
EN ISO 8044, Corrosion of metals and alloys – Basic terms and definitions (ISO 8044)
EN ISO 15257, Cathodic protection Competence levels of cathodic protection persons Basis for certification scheme (ISO 15257)
EN ISO 18086, Corrosion of metals and alloys – Determination of AC corrosion – Protection criteria (ISO 18086)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 8044 and the following apply.
ISO and IEC maintain term inological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at hflp://www.iso.orJobp
3.1 anaerobic conditions lack of free oxygen in the electrolyte adjacent to a metallic structure
3.2 anode backfill added material immediately surrounding a buried anode
3.3 electrical bond metal conductor, usually copper, connecting two points on the same structure or on different structures
3.4 cathodic protection system all active and passive components associated with the provision of active external corrosion protection and its monitoring
Note ito entry: Cathodic protection is provided either by impressed current or by galvanic anodes using one or more stations.
Note 2 to entry: Impressed current and galvanic anode systems consist of all the equipment necessary for the application of cathodic protection, such as impressed current stations, galvanic anodes, electrical bonds and isolating joints.BS EN 12954 pdf download.

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