Full-scale rupture tests were conducted on 508 mm (20 in) diameter API X-60 5,7 mm wall thickness pipes containing either axial semi-elliptical cracks or simulated corrosion defects with equivalent depths ranging from 20 to 60 percent of thickness. In the case of the cracks, the failure pressures were predicted with reasonable accuracy when considering a level 3 failure assessment diagram (FAD) procedure based on API 579, as compared to level 2 FAD, since the mechanical properties were known. In both cases, the accuracy improved for shallower cracks. Considering simulated corrosion defects, the RSTRENG approach provided more reliable results on predicting the collapse pressure. For a similar depth and profile, the cracked pipes failed at a lower pressure than those containing simulated corrosion defects of equivalent depth.


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    Title :

    Evaluation of crack and simulated corrosion defects in an API X-60 gas pipeline steel


    Additional title:

    Untersuchung der Schädigungen durch Risse und simulierte Korrosionswirkung in einem Stahl der Festigkeitsklasse API X-60 für Rohre der Erdgasfernleitungen


    Contributors:
    Hosseini, A. (author) / Cronin, D. (author) / Plumtree, A. (author)


    Publication date :

    2010


    Size :

    11 Seiten, 5 Bilder, 4 Tabellen, 10 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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