To provide a lower-cost option for long-distance gas transmission, X120 UOE linepipe has been developed. An interrupted direct quench (IDQ) process and boron additions were employed on a low-alloy steel to obtain a lower bainite microstructure with extremely small austenite grains. Plates of up to 20-mm thickness are possible with at least 231 J of Charpy energy at - 30 degree C. For longitudinal seam welding, a new wire and a new flux were developed. Heat-affected zone (HAZ) softening is limited by using a low heat input welding procedure. HAZ cold cracking resistance is excellent due to the low carbon content and Pcm relative to the X120 strength level.


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    Titel :

    Development of plate and seam welding technology for X120 linepipe


    Beteiligte:
    Asahi, H. (Autor:in) / Hara, T. (Autor:in) / Sugiyama, M. (Autor:in) / Maruyama, N. (Autor:in) / Terada, Y. (Autor:in) / Tamehiro, H. (Autor:in) / Koyama, K. (Autor:in) / Ohkita, S. (Autor:in) / Morimoto, H. (Autor:in) / Tomioka, K. (Autor:in)


    Erscheinungsdatum :

    2004


    Format / Umfang :

    7 Seiten, 7 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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