Analyses and computer simulations during the front-end engineering design of a high-pressure natural gas pipeline predicted that, without suitable mitigation, steady-state AC potentials (referenced to local earth) on the pipeline would easily exceed 100 V. Similarly, the analysis predicted AC coating stress and touch potentials approaching 12,000 V predicted during a power-line-to-ground fault. Coordination of AC mitigation and cathodic protection ensures adequate electric safety and effective corrosion control. The paper discusses aspects of coordinated design, construction, and commissioning of an AC mitigation and cathodic-protection system consisting of one steel-cored zinc ribbon adjacent to the pipeline.


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    Title :

    Reducing AC potentials requires coordinated mitigation, CP


    Additional title:

    Verringerung von Wechselstrompotenzialen erfordert koordinierte Einflussminderung und kathodischen Korrosionsschutz


    Contributors:

    Published in:

    Oil and Gas Journal ; 108 , 23 ; 51-56


    Publication date :

    2010


    Size :

    6 Seiten, 7 Bilder, 4 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English