The West-East Pipeline is the first high pressure, high-grade steel (X-70) large-diameter (1,016 mm; 40-inch) gas transmission pipeline in China. Previous study had shown that the strength mismatch between girth weld and pipe material greatly affects the integrity of the pipeline. Overmatch has been preferred for low-grade pipeline (X-60 or less). For higher strength steel pipe, undermatching has been recommended to reduce the sensitivity to cold cracking, HIC (hydrogen-induced cracking), and SCC (stress corrosion cracking). This article is based on mechanical tests for the effect of different mismatched girth welds used on the West-East Pipeline. The study indicated that mismatches girth welds affect such properites of the line pipe as limit load, fracture toughness, and treshold defect sizes. Based on the research results, some advice for design, maintenance, and repair of the pipeline is presented.


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    Titel :

    Study for West-East gas pipeline shows safety benefits of overmatched girth welds


    Weitere Titelangaben:

    Sicherheit bei Umfangsschweißungen bei der Ost-West-Pipeline in China


    Beteiligte:
    Zhuang, C. (Autor:in)

    Erschienen in:

    Oil and Gas Journal ; 101 , 10 ; 62-65


    Erscheinungsdatum :

    2003


    Format / Umfang :

    4 Seiten, 6 Bilder, 2 Tabellen, 9 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Defect tolerance in pipeline girth welds

    Hopkins, P. / Jones, D.G. / Fearnehough, G.D. | Tema Archiv | 1984


    Fracture toughness estimation for pipeline girth welds

    Pisarski, H.G. / Wignall, C.M. | Tema Archiv | 2002


    Local strain accumulation in pipeline girth welds

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    Fracture toughness testing of pipeline girth welds

    Shen, G. / Gianetto, J.A. / Bouchard, R. et al. | Tema Archiv | 2004


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