Preface

1 Scope of Application

2 Normative References

3 Terms and Definitions

3.1 General

3.2 Adjustment of Reference ValuesV

3.3 Operation of Cathodic Protection (CP)

3.4 Extension

3.5 Commissioning

3.6 Inspection

3.7 Maintenance of Cathodic Protection (CP)

3.8 Repairs

3.9 Corrosion Protection System

3.10 Verification Measurement

3.11 Definition of Reference Values

3.12 Redefinition of Reference Values

3.13 New Construction

3.14 Qualitative Risk Assessment

3.15 Spread

3.16 Improvement

3.17 Maintenance

3.18 Integral Alterations to the Corrosion rotection System

4 Planning and Construction

4.1 General

4.2 Planning the Corrosion Protection System

4.3 Normative References for Planning

4.4 Constructional Design and equirements

4.5 Planning Cathodic Corrosion Protection Stations

4.5.1 Determining the Protective Current Requirement

4.5.2 Cathodic Spread

4.5.3 Impressed Current Cathodic Protection (ICCP) Plant

4.5.4 Galvanic Anode Beds

4.5.5 Direct Current Interference

4.6 Cables

4.7 Planning Remote Inspection

4.8 Legal Procedures

4.9 New Constructions und Extension

4.9.1 General

4.9.2 Measures at Protected Structure during New Constructions and Extension

4.9.2.1 Insulated Joints

4.9.2.2 Interference Sleeve Structures

4.9.2.3 Protected Structures at Bridge Structures

4.9.2.4 Electrical Equipment

4.9.2.5 Lightning Protection Systems

4.9.2.6 Measures to Secure Contact Protection and Prevent AC Corrosion in Pipelines Subjected to High Voltage Interference

4.9.2.7 Pipe Entries, Wall Supports, Saddles und Bracings for Pipelines

4.9.3 Installation of Cathodic Protection in a New Construction

4.9.3.1 Impressed Current Cathodic Protection System

4.9.3.1.1 General

4.9.3.1.2 Transformer-Rectifier Units

4.9.3.1.3 Impressed Current Anode und Galvanic Anode Beds

4.9.3.2 D.C. Drainage in Case of Interference by D.C. Powered Railways

4.9.3.3 Test Points and Measuring Points

4.9.3.4 Cables

4.9.4 Installation of CP Systems at Extensions

4.10 Alternating Current and Direct Current Interference

4.11 Installation of Remote Inspection

4.12 Testing Construction Requirements

4.13 Acceptance and Handover for the New Construction

5 Commissioning

5.1 General

5.2 Preliminary Check

5.3 Activation und Calibration of the CP System

5.4 Assessment of Effectiveness and Verification Measurement

5.5 Definition of Reference Values

6 Operation

7 Maintenance

7.1 General

7.2 Inspection

7.2.1 General

7.2.2 Function Control

7.2.3 Assessment of CP Effectiveness

7.2.4 Remote Inspection

7.2.4.1 General

7.2.4.2 Function Control

7.2.4.3 Assessment of CP Effectiveness

7.2.4.4 Complex Structures

7.2.5 Recommended Additional Tests

7.3 Maintenance

7.4 Repair

7.5 Interference

8 Documentation

8.1 General

8.2 Documentation of Planning

8.3 Documentation of Construction

8.4 Documentation of Commissioning

8.5 Documentation of Remote Inspection Installation

8.6 Documentation of Reference Values

9 Requirements for Remote Inspection Technology

9.1.1 General

9.1.2 Sensors

9.1.3 Additional Requirements for Sensors for Categories 2a, 2b and 2c

9.1.4 Additional Requirements for the Central Unit for Categories 2a, 2b and 2c

9.2 Requirements for Interfered Protected Structures

9.2.1

9.2.2 Sensor Requirements for Existing Interference by Time-Varying Direct Currents from Direct Current Sources

9.2.3 Sensor Requirements for Existing A.C. Interference

Annex A (informative) – Procedure for Determining the Protective Current Requirement

A.1 Power Supply Measurement

A.2 Extrapolation Method

A.3 Estimation of Spread Length

Annex B (informative) – Examples of Construction of a Cathodic Protection Station for Buried LNG Tanks

Annex C (informative)– Procedures for Testing CP Effectiveness

Annex D (informative) – Further Notes on Remote Inspection Technology

D.1 Notes Concerning All Protected Structures

D.1.1 Sensors

D.1.2 Central Unit

D.1.3 Current Measuring Devices

D.1.4 Transmission Technology

D.1.5 Permanent Reference Electrode

D.1.6 Categories 2a, 2b and 2c

D.1.6.1 Sensors

D.1.6.2 Current Measurements

D.2 Additional Information for Interfered Protected Structures

D.2.1 Sensors in Case of Interference by Time-Varying Direct Currents from Direct Current Sources

D.2.2 Shunt Resistors in Case of Alternating Current Interference

D.3 Derivation of the Minimum Coating Resistance RCOmin of a Protected Structure According to Category 2c

D.4 Derivation of Diameter dT of a Test Holiday

D.5 Installation of Permanent Reference Electrodes and Potential Test Probes

Annex E (informative) – Anode Beds

E.1 Impressed Current Anode Beds

E.1.1 Galvanic Anode Beds

Annex F (informative) – Electrolyte Measurement Procedure for the Detection of Coating Damages Within the Field Coated Weld Seam Area

Annex G (informative) – Example Report on the Construction and Commissioning of CP

Annex H (informative) – Example of an Expert Certificate on the Effectiveness of the Cathodic Protection