For upgrading long-term integrity of transmission pipelines, two types of delayed fracture in regions of mechanical damage in pipelines were investigated. Experimental and numerical studies clarified factors affecting the fatigue behavoir of line pipes containing an idealized flaw under fluctuating internal pressure. To investigate fatigue cracking at mechanical damage in pipelines, degradation of fracture toughness and fatigue properties dur to plastic prestrain was also evaluated. A fracture mechanics-based study revealed conditions necessarily for initiation of HSC (hydrogen stress cracking) at a surface defect in line pipes under cathodic protection.


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    Title :

    Factors affecting long-term integrity of transmission pipelines


    Additional title:

    Faktoren, die die Langzeit-Integrität von Pipelines beeinflussen


    Contributors:
    Hagiwara, N. (author) / Masuda, T. (author) / Oguchi, N. (author)


    Publication date :

    2000


    Size :

    12 Seiten, 6 Bilder, 15 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English





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