Oil and gas transmission pipelines have a good safety record and are a demonstrably safe means of transporting hydrocarbons. This is due to a combination of good design, materials and operating practices. However, like any engineering structure, pipelines do occasionally fail. The major causes of pipeline failures around the world are external interference and corrosion; therefore, assessment methods are needed to determine the severity of such defects when they are detected in pipelines. Defects occurring during the fabrication of a pipeline are usually assessed against recognised and proven quality control (workmanship) limits. These workmanship limits are somewhat arbitrary, but they have been proven over time. However, a pipeline will invariably contain larger defects at some stage during its life, and these will require a 'fitness-for-purpose' assessment to determine whether or not to repair the pipeline. Consequently, the past 40 years have seen a large number of full scale tests of defects in pipelines, and the development of a number of methods for assessing the significance of defects. Some of these methods have been incorporated into industry guidance, others are to be found in the published literature. However, there is no definitive guidance that draws together all of the assessment techniques, or assesses each method against the published test data, or recommends best practice in their application. To address this industry need, a Joint Industry Project has developed a pipeline defect assessment manual (PDAM). PDAM documents the best available techniques currently available for the assessment of pipeline defects (such as corrosion, dents, gouges, welding defects, etc.) in a simple and easy-to-use manual, and gives guidance in their use. PDAM is based on an extensive critical review of pipeline fitness-for-purpose methods and published test data. It is intended to be another tool to help pipeline engineers maintain the high level of pipeline safety. In addition to identifying the best methods, PDAM has served to identify a number of limitations in the current understanding of the behaviour of defects in pipelines, and the empirical limits in the application of existing methods. This paper discusses the PDAM project, in the context of both the current best practice available for defect assessment and the limitations of current knowledge.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Best practice for the assessment of defects in pipelines - gouges and dents


    Weitere Titelangaben:

    Beste Verfahrensweise zur Beurteilung von Defekten an Rohrleitungen - Rillen und Beulen


    Beteiligte:
    MacDonald, K.A. (Autor:in) / Cosham, A. (Autor:in)


    Erscheinungsdatum :

    2005


    Format / Umfang :

    26 Seiten, 10 Bilder, 3 Tabellen, 59 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Fatigue life prediction for short dents in petroleum pipelines

    Rinehart, A.J. / Keating, P.B. | Tema Archiv | 2002


    Magnetic fields pop dents

    Tema Archiv | 1996


    Building prefabricated component overturning device capable of avoiding gouges

    HU LIN | Europäisches Patentamt | 2021

    Freier Zugriff

    Residual Stress in Oil and Gas Pipelines with Two Types of Dents during Different Lifecycle Stages

    Wu, Ying / Zou, Rong / Wang, Yihuan et al. | Springer Verlag | 2020


    Damage Tolerance of Fuselage Dents

    Journet, B. / Congourdeau, F. / Ithurralde, C. et al. | British Library Conference Proceedings | 2005