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Novel Leak Localization in Pressurized Pipeline Networks using Acoustic Emission and Geometric Connectivity

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journal contribution
posted on 12.11.2013, 00:00 by Didem Ozevin, James Harding
Time dependent aging and instantaneous threats can cause the initiation of damage in the buried and on-ground pipelines. Damage may propagate all through the structural thickness and cause leaking. The leakage detection in oil, water, gas or steam pipeline networks before it becomes structurally instable is important to prevent any catastrophic failures. The leak in pressurized pipelines causes turbulent flow at its location, which generates solid particles or gas bubbles impacting on the pipeline material. The impact energy causes propagating elastic waves that can be detected by the sensors mounted on the pipeline. The method is called Acoustic Emission, which can be used for real time detection of damage caused by unintentional or intentional sources in the pipeline networks. In this paper, a new leak localization approach is proposed for pipeline networks spread in a two dimensional configuration. The approach is to determine arrival time differences using cross correlation function, and introduce the geometric connectivity in order to identify the path that the leak waves should propagate to reach the AE sensors. The leak location in multi-dimensional space is identified in an effective approach using an array of sensors spread on the pipeline network. The approach is successfully demonstrated on laboratory scale polypropylene pipeline networks.

Funding

The authors would like to thank the WISEST program at the UIC for their support to the corresponding author’s research.

History

Publisher Statement

NOTICE: This is the author’s version of a work that was accepted for publication in International Journal of Pressure Vessels and Piping. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Pressure Vessels and Piping, Vol 92, Pages 63-69, April 2012, DOI: 10.1016/j.ijpvp.2012.01.001

Publisher

Elsevier

Language

en_US

issn

0308-0161

Issue date

01/04/2012

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