In-Line Inspection (ILI) with MFL tool and Ultrasonics tool is the best and prevailed technology to inspect integrity of buried pipelines. KOGAS developed MFL tool named KogasMFL (ver 1.0) consists of MFC (Magnetic Flux Circuit) module, DAS (Data Acquisition System) module connected by universal joint in 2004, and data analysis system through the field experiments using artificial defects to implement ILI on pipeline owned by KOGAS. But we decided to develop an alternative design to increase performance in piggability and robustness, grow up magnetic flux strength applied to pipe wall, and made a robust sensor mount system against pig rolling before doing field application in 2007. In this paper, we will describe the structure of advanced magnetizer, which introduces magnetic flux stronger than previous version by adopting card type brushes and circular array of permanent magnets and compare results of field experiments and FEM analysis of the different types magnetizer respectively. As a conclusion, we could see that developed magnetizer and urethane sensor mount system worked very well when pig ran through the pipeline for long itinerary and a very high speed more than 6[m/sec]. This system showed more enhanced performance in detecting defects than the previous system. Keywords. MFL tool, Magnetizer, Defects, Pipeline, FEM


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    Title :

    Development of strong magnetizer and robust sensor mount system to increase performance in detecting defects on pipeline


    Contributors:
    Cho, S.H. (author) / Yoo, H.Y. (author) / Kim, D.K. (author) / Park, D.J. (author) / Rho, Y.W. (author) / Seo, K. (author) / Park, G.S. (author)


    Publication date :

    2009


    Size :

    10 Seiten, 9 Bilder, 3 Tabellen, 2 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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