Evaluation and Validation of Aboveground Techniques for Coating Condition Assessment

Project Categories

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• Direct Assessment
• Pipeline Condition
• External Corrosion

Main Objective

The overall objective is to determine the limitations/resolution of typically used modern aboveground ECDA techniques with respect to locating holidays and disbondments in the common coatings with varying spatial relationships and geometrical configuration, and to create an extensive test site which enables a wider array of variables to be investigated.

Public Abstract

Multiple options exist for aboveground surveys to identify areas of disbonded coating on pipelines, and it is known that different techniques have different detection limits, accuracies, and precision. These surveys are essential for external corrosion direct assessment (ECDA) of pipelines. The knowledge of which holidays are detectable with accuracy and which may be missed or misinterpreted by any or all specific techniques is a critical component for proper interpretation of ECDA surveys. Thus, this project proposes to investigate the accuracy of these techniques on (a) existing pipelines scheduled for excavation, and (b) a test site consisting of buried pipeline sections with known, catalogued defects. Once constructed, the test site will become a valuable tool for both ECDA research and training activities.

Final Report

DTRS56-05-T-0004 final-Rev1

DTRS56-05-T-0004_final-Rev1.pdf (3,083,243 bytes) [View] [Download/Save...]

Quarterly Status Reports

2nd Quarter Public Report - Revised

2Q-PublicReport-Revised.pdf (73,493 bytes) [View] [Download/Save...]

3rd quarter Public report (1-page)

3Q_public_report.pdf (102,488 bytes) [View] [Download/Save...]

Projno168-1Q-Rev1-Public

Projno168-1Q-Rev1-Public.pdf (81,549 bytes) [View] [Download/Save...]