The objective of this study consisted in investigating the possible causes which give rise to the presence of low wall pipe thicknesses on a 16" natural gas transport pipeline, even though during the last 12-year period cathodic protection (CP) potentials were kept in the protection range at which external corrosion should not occur. Results from in-line inspection from a 16" natural gas transport pipeline showed 46 indications with more than 80% wall thickness lost due to external corrosion in the second segment of the pipeline. Direct inspection at the indication locations, review of the CP system performance, pipeline maintenance programs and studies, allowed to make an integral diagnostic where it was found out that the main cause of external corrosion was an inappropriate coating application since the pipeline construction, this situation has originated the increase of CP shielding effects through time.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Integral diagnostic in the failure causes of external corrosion of a natural gas transport pipeline



    Published in:

    Materials and Corrosion ; 62 , 8 ; 796-801


    Publication date :

    2011


    Size :

    6 Seiten, 11 Bilder, 3 Tabellen, 17 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Causes of the failure of a synthesis gas pipeline

    Czyzowicz, S. / Milinski, P. | Tema Archive | 1993


    Outside force causes most natural gas pipeline failures

    Eiber, R.J. / Jones, D.J. / Kramer, G.S. | Tema Archive | 1987


    Failure analysis of a non-integral pipeline collet connector

    Fassina, P. / Guagliano, M. / Lazzari, L. et al. | Tema Archive | 2005