This report presents the details of performance trials evaluating the capability of ILI systems to provide pipe-line condition information for dents with coincident or closely aligned features. A set of sample dent features were prepared along with a trial protocol and performance metrics beyond those presented in API 1163 that were used to characterize ILI systems’ performance. A series of ILI system pull- and pump-through trials of magnetic, ultrasonic (pump-through with liquid couplant), and caliper-based ILI technologies from nine ILI Service Providers were per-formed. Data from these...
This report presents the details of performance trials evaluating the capability of ILI systems to provide pipe-line condition information for dents with coincident or closely aligned features. A set of sample dent features were prepared along with a trial protocol and performance metrics beyond those presented in API 1163 that were used to characterize ILI systems’ performance. A series of ILI system pull- and pump-through trials of magnetic, ultrasonic (pump-through with liquid couplant), and caliper-based ILI technologies from nine ILI Service Providers were per-formed. Data from these trials were used to quantify detection, identification, and sizing perfor-mance of the ILI systems for isolated corrosion features, dents with variety of shapes including those without coincident features and those with corrosion, gouges and/or cracks. The effect of dents on the ILI system detection, identification and sizing of the coincident features was evalu-ated.