Investigate Fundamentals and Performance Improvements of Current In-Line Inspection Technologies for Mechanical Damage Detection

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• In-Line Inspection/Pigging
• Literature Review

Main Objective

This project will be an evaluation of existing in-line inspection tools for detecting, discriminating, and characterizing mechanical damage. The main benefit is to help industry manage the threat of delayed mechanical damage and document the relative value of existing technology versus additional technology, such as the proposed dual field technique, in characterizing mechanical damage and discriminating defects from benign anomalies.

Public Abstract

Mechanical damage to pipelines from outside forces, if undetected, can lead to leaks and occasionally ruptures. This damage can be caused over time by rocks or abruptly by excavation equipment. A majority of the anomalies due to outside forces are not injurious. However, a few prominent pipeline failures have been attributed to mechanical damage. The pipeline industry has multiple in-line inspection approaches to inspection for mechanical damage. Commonly used methods include in-line deformation (caliper) tools, which measure the bore diameter, and magnetic flux leakage technology (MFL). The pipeline industry and government regulatory organizations need to know the relative capability of these approaches and best way to apply inspection technology. The objective of this project is to evaluate the capability of a number of deformation and MFL based inspection tools that may detect and possibly discriminate mechanical damage. The proposed project would identify current capabilities of mechanical damage inspection technologies used in the pipeline industry. This project would provide data to validate assessment capability of in-line inspection tools while tying these results back to fundamentals and performance characteristics.

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