Acoustic Emission leak detection and location for liquid-filled, buried pipelines was studied using various leak sources and laboratory reference standards. These standards provided significant data that have contributed to the development of test procedures for generating two-phase flow and a better understanding of the leak mechanism. Results are discussed for leak signal enhancement due to two-phase flow, leak orientation and the presence of backfill surrounding the pipe. Field studies were performed on buried pipes to demonstrate that small leaks (less than O.1 gallons/hour or O.1 mL/second) can be detected under the right test conditions and that the location of these small leaks can be determined using a variety of location methods. Among the different location methods examined was a location technique referred to as 'tuned' linear location. In addition, a modification to the conventional Signal Difference location technique is discussed.


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    Title :

    Development of Acoustic Emission for leak detection and location in liquid-filled, buried pipelines


    Contributors:
    Miller, R.K. (author) / Pollock, A.A. (author) / Finkel, P. (author) / Watts, D.J. (author) / Carlyle, J.M. (author) / Tafuri, A.N. (author) / Yezzi, J.J. jun. (author)


    Publication date :

    1999


    Size :

    12 Seiten, 4 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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