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Integral diagnostic in the failure causes of external corrosion of a natural gas transport pipeline / J. L. Mora-Mendoza in Materials and corrosion, Vol. 62 N° 8 (Août 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 8 (Août 2011) . - pp. 796-801 Titre : Integral diagnostic in the failure causes of external corrosion of a natural gas transport pipeline Type de document : texte imprimé Auteurs : J. L. Mora-Mendoza, Auteur ; L. C. Saucedo-Robles, Auteur ; H. Rodriguez-Clemente, Auteur Année de publication : 2011 Article en page(s) : pp. 796-801 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Cathodic  protection  (CP)CIS-DCVG  External  corrosion  In-line  inspection  (ILI)  Protective  coating Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : 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. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905581/abstract [article] Integral diagnostic in the failure causes of external corrosion of a natural gas transport pipeline [texte imprimé] / J. L. Mora-Mendoza, Auteur ; L. C. Saucedo-Robles, Auteur ; H. Rodriguez-Clemente, Auteur . - 2011 . - pp. 796-801. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 8 (Août 2011) . - pp. 796-801 Mots-clés : Cathodic  protection  (CP)CIS-DCVG  External  corrosion  In-line  inspection  (ILI)  Protective  coating Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : 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. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905581/abstract