PR-377-113602-R01 Long-term Field Performance and Review of Failure Modes and Effects of FBE Coatings

This report describes a review of the long-term field performance and the failure modes and effects of fusion-bonded epoxy (FBE) external pipeline coating. Field data have been obtained from various PRCI member companies and, where possible, are used to validate information obtained from the review of the technical literature. Although all potential failure modes are considered, particular attention is paid to (i) the effects of operating at temperatures greater than 150°F (65°C), (ii) the effect of cathodic protection and, especially, high CP levels, and (iii) the detection of holidays and the impact of high test voltages. It is apparent from all of the information reviewed that FBE coatings provide excellent performance, primarily because of their CP-permeability that ensures continued protection for the pipe in the event of disbondment.