RP0169-2002
ii NACE International
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NACE International
Standard
Recommended Practice
Control of External Corrosion on Underground
or Submerged Metallic Piping Systems
Contents
1.General ............................................................................................................................ 1
2.Definitions ........................................................................................................................ 1
3.Determination of Need for External Corrosion Control .................................................... 3
4.Piping System Design...................................................................................................... 4
5.External Coatings............................................................................................................. 6
6.Criteria and Other Considerations for Cathodic Protection............................................ 12
Bibliography for Section 6 ................................................................................................. 15
7.Design of Cathodic Protection Systems......................................................................... 17
Bibliography for Section 7 ................................................................................................. 20
8.Installation of Cathodic Protection Systems .................................................................. 21
9.Control of Interference Currents.................................................................................... 22
10. Operation and Maintenance of Cathodic Protection Systems.................................... 24
11. External Corrosion Control Records........................................................................... 25
References........................................................................................................................ 27
Appendix A—Interference Testing.................................................................................... 28
Appendix B—Method for Determining Probable Corrosion Rate and
Costs of Maintaining
Service ........................................................................................................................ 29
Appendix C—Contingent Costs of Corrosion.................................................................... 29
Appendix B—Costs of Corrosion Control.......................................................................... 29
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