The three layer pipeline coating system is one of the fastest growing and more accepted
systems in the world, in great part due to the combination of the excellent adhesion
properties of the FBE, and the excellent water impermeability and mechanical resistance of
the HDPE. We report a case study of a disbondment failure occurred at a 24” gas pipeline
and the steps taken to try to determine the root cause of the failure.
KEY WORDS.- Fusion bonded epoxy, three layer pipeline coating system, cathodic protection
shielding, material characterization