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Title: Combined metal loss and crack inspection of a gas pipeline utilizing ultrasound technology.
Category:
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: pg3460
Date of Publication: Feb 1 2007 12:00AM
Price: $25.00 US
Authors: Roger Vogel, Dr Michael Beller, Reinhard Dyck, Gerard Lalonde, Ray Yates, and Lee Pollard
Abstract: This paper introduces a new in-line inspection tool, based on a special configuration of the modular LineExplorer range of intelligent pigs utilizing ultrasound technology. This configuration enables a pipeline section to be inspected for metal loss and cracks in a single run, incorporating true quantitative wall thickness measurement. Major advantages are increased efficiency regarding pipeline preparation and cleaning as well as operations during the inspection run.

A major added value to customers is the enhanced data quality, based on the optimized correlation of metal loss and crack inspection measurements. The dataobtained is ideally suited for advanced integrity assessment and defect growth analysis.

The paper introduces a case study related to the inspection of a gas pipeline in Canada using this tool. As ultrasound requires a liquid couplant, it was necessary to run the inspection in a suitable liquid batch. This paper describes the related operational procedures.

Finally the paper discusses the advantages of using combined inspection technologies and provide a short outlook on further developments.

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