NEN EN 13636 : 2004

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Criteria for cathodic protection
5 Prerequisites for the application of cathodic
   protection
   5.1 General
   5.2 Electrical continuity
   5.3 Electrical separation
   5.4 External coating
6 Base data for design
   6.1 General
   6.2 Neighbouring structures
   6.3 Soil environment
   6.4 Tank and piping data
        6.4.1 General
        6.4.2 Stored medium
7 Design and prerequisites
   7.1 Structure materials
   7.2 Electrical separation
        7.2.1 General
        7.2.2 Isolating devices
        7.2.3 Temporary connections
        7.2.4 Permanently connected electrical equipment
   7.3 Explosion hazard prevention
        7.3.1 General
        7.3.2 Electrical equipment installation
        7.3.3 Isolating joints
   7.4 Other equipment
        7.4.1 Test station
        7.4.2 Coupons
        7.4.3 Mechanical connections including flanges
        7.4.4 Sleeve pipe
        7.4.5 Wall entries
        7.4.6 Drainage station
        7.4.7 Local earthing systems
   7.5 Galvanic anode systems
        7.5.1 General
        7.5.2 Materials
        7.5.3 Location
        7.5.4 Connection of anodes to the structure
   7.6 Impressed current systems
        7.6.1 General
        7.6.2 Components
   7.7 Cables
   7.8 Interference
8 Installation of cathodic protection systems
   8.1 General
   8.2 Installation of cables
        8.2.1 General
        8.2.2 Cable connections to structures
   8.3 Installation of structures to be protected
        8.3.1 Buried structures
        8.3.2 Above-ground structures
        8.3.3 Isolating joints
   8.4 Anodes
        8.4.1 General
        8.4.2 Galvanic anodes
        8.4.3 Impressed current anodes
   8.5 Impressed current station
        8.5.1 Location
        8.5.2 Electrical installation
   8.6 Test stations, measuring points and coupons
   8.7 Bondings and drainage stations
   8.8 Labelling
   8.9 Installation checks
   8.10 As-built documentation
9 Commissioning
   9.1 Preliminary checking
   9.2 Start-up
   9.3 Verification of the cathodic protection
        effectiveness
   9.4 Determination of relevant measuring points
   9.5 Commissioning documents
10 Inspection and maintenance
   10.1 General
   10.2 Inspection
        10.2.1 General
        10.2.2 Functional checks of equipment
        10.2.3 Structure measurements
        10.2.4 Inspection intervals
        10.2.5 Inspection report
   10.3 Maintenance
        10.3.1 Cathodic protection equipment
        10.3.2 Instrumentation
Annex A (informative) Electrical separation between the
                      structure to be cathodically
                      protected and the general earthing
                      system
   A.1 Isolation of electrical equipment
   A.2 Electrical equipment of protection class II or III
        (double isolation)
   A.3 Fault current breaker with local earthing system
   A.4 Isolating transformer
   A.5 Example with d.c. decoupling unit
Annex B (informative) Groundbed data
   B.1 General considerations
   B.2 Type of groundbed
        B.2.1 General
        B.2.2 Remote located groundbed
        B.2.3 Close located groundbed
   B.3 Anode type
        B.3.1 High-silicon cast iron anodes
        B.3.2 Mixed-metal oxide anodes
Annex C (informative) Extract of pr EN 50162
Annex D (informative) Determination of inspection interval
   D.1 General
   D.2 Complexity of the cathodic protection system
   D.3 Coating imperfections
   D.4 Environmental conditions
   D.5 Susceptibility to damage by lightning or mechanical
        impact
   D.6 Risk of personal injury, environmental pollution or
        damage to property that could be caused by leakage of
        stored medium
Bibliography

Defines the principles for the implementation of a system of cathodic protection against corrosive attacks on buried metal tanks and associated piping.