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Pipelines have been considered one of the safest methods of transporting energy from one place to another. This is achieved through a systematically planned, documented, and comprehensive pipeline integrity management (PIM) program. PIM covers areas such as engineering, operations, inspections and maintenance, health and safety, and environment protection.
ECDA (External Corrosion Direct Assessment) and SCCDA (Stress Corrosion Cracking Direct Assessment) methodologies were developed to assess pipeline integrity and ensure the safe operation of pipelines. The methodologies are applicable to piggable and difficult to pig pipelines. It is critical to precisely identify the direct examination location to ensure the highest return on investment and effective risk mitigation. This paper will present case studies that will summarize the recent advancements and successful application of ECDA and SCCDA methodology on energy pipelines in North America.
The quality of indirect inspection data is critical in an External Corrosion Direct Assessment (ECDA). The need exists to increase the accuracy of the field data collection, to improve the data processing and to effectively present the results. This paper describes several challenges.
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This paper will show improvements in interpretation of direct current voltage gradient % IR and how accurate selection of pipeline coating rehabilitation location based on this concept would lead to improvements in cathodic protection performance. Case studies from previous external corrosion direct assessment digs will be presented.