SN EN 12954 : 2001

Foreword
Introduction
1 Scope
2 Normative references
3 Symbols, terms and definitions
   3.1 Symbols
   3.2 Terms and definitions
4 Principle and criteria of cathodic protection
   4.1 Principle of cathodic protection
   4.2 Criteria of cathodic protection
   4.3 Influence of alternating current on cathodically
       protected structures
5 Prerequisites for application of cathodic protection
   5.1 General
   5.2 Electrical continuity
   5.3 Electrical isolation
   5.4 External coating
6 Base data for design
   6.1 General
   6.2 Structure details
   6.3 Coating
   6.4 Environment
   6.5 Pipelines specific data
7 Design and prerequisites
   7.1 General
   7.2 Electrical isolation
   7.3 Test stations
   7.4 Bonding
   7.5 Buried sleeve pipes for pipelines
   7.6 Wall entries, restraints, saddles and anchors
       for pipelines
   7.7 Bridges
   7.8 Electrically operated equipment
   7.9 Lighting protection
   7.10 Equipment for the reduction of a.c. interference
   7.11 Cathodic protection systems
   7.12 Drainage stations
   7.13 Design and design documents
8 Installation of cathodic protection systems
   8.1 General
   8.2 Cables
   8.3 Galvanic anodes
   8.4 Impressed current systems
   8.5 Test stations
   8.6 Drainage stations
   8.7 As built documentation
9 Commissioning
   9.1 Preliminary checking
   9.2 Start up
   9.3 Verification of the cathodic protection
       effectiveness
   9.4 Installation and commissioning documents
10 Inspection and maintenance
   10.1 General
   10.2 Factors influencing inspection frequency
   10.3 Inspection
   10.4 Maintenance
   10.5 Results of inspection
Annex A (informative) a.c. interference
Bibliography

Gives the general principles for the implementation of a system of cathodic protection against corrosive attacks on buried or immersed metal structures with and without the influence of external electrical sources.