PR-328-083501-R01 Evaluation of EMAT Tool Performance and Reliability by Monitoring Industry Experience

PRCI project SCC 3-7 consists of two phases: Phase I: “Evaluation of EMAT Tool Performance by Monitoring Industry Experience” (2008-2011) and Phase II: “Evaluation of the Reliability of EMAT Tool by Monitoring Industry Experience” (2012-2015).

In this report, performance of the EMAT tools based on analysis of the data from 15 pipeline segments from Phase I and 35 pipeline segments from Phase II is presented. The performance is updated with the newly analyzed data in terms of the probability of detection, identification, false calls, and sizing. Categorization of these 35 segments is presented at three different levels of using EMAT ILI as an integrity tool alternative to hydrotest for management of SCC in gas pipelines. Finally, the reliability of EMAT for SCC management is evaluated incorporating the performance measures and the assessment methodology. The reliability of the hydrotest is calculated based on the collected historical data from one Gas Pipeline Operator.