Large scale test apparatus to test external leak detection technologies

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Proceedings titleProceedings of the Biennial International Pipeline Conference, IPC
Conference2014 10th International Pipeline Conference, IPC 2014, 29 September 2014 through 3 October 2014
SubjectCables; Leak detection; Materials testing; Pipeline laying; Temperature sensors; Distributed temperature sensing; Laboratory environment; Leak detection technology; Pipeline construction; Pressure and temperature; Trenching
AbstractWhen it comes to evaluating traditional computational leak detection technologies pipeline operators have a suite of simulated testing methods available. In the last several years however External Leak Detection Technologies have become more mature and potentially could provide operators with another layer of leak detection with more sensitivity than seen in traditional methods. The challenge with these technologies is in the evaluation of their sensitivity, reliability, and robustness. ENBRIDGE INC (Enbridge) and C-FER Technologies 1999 Inc. (C-FER) begun a comprehensive study to assess the state-of-the-art external, continuously distributed sensors for leak detection in early 2012. Initially, a technology review was undertaken to identify commercial, off-the-shelf technologies with the potential to detect small leaks of oil from buried pipelines. From this literature review, four technologies were identified; Distributed Temperature Sensing (DTS), Distributed Acoustic Sensing (DAS), Vapor Sensing Tubes (VST), and Hydrocarbon Sensing Cables (HSC). All four methods require proprietary materials and technology, which have had limited independent testing efforts to date. To evaluate these four leak detection methods and their vendors in an objective way, Enbridge and C-FER initiated the design and construction of a large-scale External Leak Detection Experimental Research apparatus (ELDER) that can accommodate a full-size segment of pipeline within a trench, at the same scale used in pipeline construction in North America. An instrumented pipe segment is buried in the trench with sensing cables laid alongside. The apparatus generates leaks with controlled variables including rate, pressure and temperature, and at various locations to accurately represent pipeline leaks. This paper summarizes the literature review on the four selected leak detection technologies that were identified as candidates for large-scale evaluation. The discussion will also include features of the ELDER apparatus, and re-engineered pipeline construction techniques that were required to accurately represent a full-scale pipeline trench within a laboratory environment.
Publication date
PublisherAmerican Society of Mechanical Engineers
AffiliationNational Research Council Canada; Construction
Peer reviewedYes
NPARC number21275563
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Record identifier975997a1-2edd-4de2-8fb0-bcda74210564
Record created2015-07-14
Record modified2016-05-09
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