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Evaluation results on the effectiveness of the corrosion protection system for underground pipelines, using the DC-voltage gradient technique

Abstract

A pipeline of diameter 6'' with 17.694 km of extension was evaluated how much to the integrity of its external covering and the effectiveness of the system of cathodic protection, using the method DC-Voltage Gradient. The Cathodic Protection in this pipeline is made by seven rectifiers. The gotten data indicate that the potential pipe-ground registered in some check points to the long one of the pipeline is extremely negative, what has led to a super protection of the pipeline for the CP. This if explains for the great proximity between the anodes and the pipeline. For km had been identified 917 failures with a mean density of 50,1 per Km. Beyond the analysis of the data, this work includes conclusions and recommendations detailed for the repairs of the covering of the pipeline and for improvement of the effectiveness of the CP. One sends regards to a combination of repairs in the covering and reevaluation of the CP, in way to improve the protection level and to assure the reduction of the risk of external corrosion. (author)
Authors:
Ribeiro, Antonio Carlos [1] 
  1. Petroquimica Uniao S.A., Santo Andre, SP (Brazil)
Publication Date:
Jul 01, 2003
Product Type:
Conference
Report Number:
ETDE-BR-20897659
Resource Relation:
Conference: Rio pipeline 2003 conference and exposition, Rio de Janeiro, RJ (Brazil), 21-23 Oct 2003; Other Information: 2 refs., 6 figs. Also available from the Library of the Brazilian Nuclear Energy Commission, Rio de Janeiro, in electronic form. Codes: IBP428{sub 0}3; BR0701752.pdf
Subject:
42 ENGINEERING; PIPELINES; EVALUATION; COVERINGS; FAILURES; CATHODIC PROTECTION; CORROSION; REPAIR; DIRECT CURRENT
OSTI ID:
20897659
Research Organizations:
Instituto Brasileiro de Petroleo e Gas (IBP), Rio de Janeiro, RJ (Brazil)
Country of Origin:
Brazil
Language:
English
Other Identifying Numbers:
TRN: BR0701752
Availability:
Commercial reproduction prohibited; OSTI as DE20897659
Submitting Site:
BR
Size:
[10] pages
Announcement Date:
Aug 10, 2007

Citation Formats

Ribeiro, Antonio Carlos. Evaluation results on the effectiveness of the corrosion protection system for underground pipelines, using the DC-voltage gradient technique. Brazil: N. p., 2003. Web.
Ribeiro, Antonio Carlos. Evaluation results on the effectiveness of the corrosion protection system for underground pipelines, using the DC-voltage gradient technique. Brazil.
Ribeiro, Antonio Carlos. 2003. "Evaluation results on the effectiveness of the corrosion protection system for underground pipelines, using the DC-voltage gradient technique." Brazil.
@misc{etde_20897659,
title = {Evaluation results on the effectiveness of the corrosion protection system for underground pipelines, using the DC-voltage gradient technique}
author = {Ribeiro, Antonio Carlos}
abstractNote = {A pipeline of diameter 6'' with 17.694 km of extension was evaluated how much to the integrity of its external covering and the effectiveness of the system of cathodic protection, using the method DC-Voltage Gradient. The Cathodic Protection in this pipeline is made by seven rectifiers. The gotten data indicate that the potential pipe-ground registered in some check points to the long one of the pipeline is extremely negative, what has led to a super protection of the pipeline for the CP. This if explains for the great proximity between the anodes and the pipeline. For km had been identified 917 failures with a mean density of 50,1 per Km. Beyond the analysis of the data, this work includes conclusions and recommendations detailed for the repairs of the covering of the pipeline and for improvement of the effectiveness of the CP. One sends regards to a combination of repairs in the covering and reevaluation of the CP, in way to improve the protection level and to assure the reduction of the risk of external corrosion. (author)}
place = {Brazil}
year = {2003}
month = {Jul}
}