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    STP1353

    The Development of Acoustic Emission for Leak Detection and Location in Liquid-Filled, Buried Pipelines

    Published: 01 January 1999


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    Abstract

    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 0.1 gallons/hour or 0.1 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.

    Keywords:

    acoustic emission, leak detection, source location, buried pipelines, liquid-filled pipelines, laboratory reference standards


    Author Information:

    Miller, RK
    Executive Director, Director of Education and Training, and Research Engineer/Scientist, Engineering Services & Inspection Group, Physical Acoustics Corporation (PAC), Lawrenceville, NJ

    Pollock, AA
    Executive Director, Director of Education and Training, and Research Engineer/Scientist, Engineering Services & Inspection Group, Physical Acoustics Corporation (PAC), Lawrenceville, NJ

    Finkel, P
    Executive Director, Director of Education and Training, and Research Engineer/Scientist, Engineering Services & Inspection Group, Physical Acoustics Corporation (PAC), Lawrenceville, NJ

    Watts, DJ
    Executive Director and Acoustic Specialist, Emission Reduction Research Center, New Jersey Institute of Technology, Newark, NJ

    Carlyle, JM
    Executive Director and Acoustic Specialist, Emission Reduction Research Center, New Jersey Institute of Technology, Newark, NJ

    Tafuri, AN
    Research Program Coordinator and Physical Scientist, U.S. Environmental Protection Agency (EPA) NRMRL/WSWRD/UWMB, Edison, NJ

    Yezzi, JJ
    Research Program Coordinator and Physical Scientist, U.S. Environmental Protection Agency (EPA) NRMRL/WSWRD/UWMB, Edison, NJ


    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP15781S