Pipeline safety assessment at inspection time

J. Alamilla, J. García-Vargas, J. Oliveros

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This work presents a reliability model for determining the pipeline safety after obtaining information on the corrosion damage of the piping system by non-destructive inspection. The model is used to estimate pipeline system reliability in every region containing detected corrosion defects and the probability of either global system failure or of a given pipeline segment. The global failure probability incorporates the contribution of defects that are undetectable by the inspection tool. For this, the probability density functions of maximum depths and the number of undetected corrosion defects by the inspection tool are also determined. The failure associated to each corrosion defect is determined from the pipeline resistance and fluid pressure. The model is applied to a pipeline segment of a given length showing that defect measurement errors and the contribution of corrosion defects, undetected by inspection tool, can significantly influence the value of failure probability of the system. To calculate the failure probability of the system the directional simulation technique is utilized.

Original languageEnglish
Title of host publicationProceedings of 25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006
DOIs
StatePublished - 2006
Externally publishedYes
Event25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006 - Hamburg, Germany
Duration: 4 Jun 20069 Jun 2006

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume2006

Conference

Conference25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006
Country/TerritoryGermany
CityHamburg
Period4/06/069/06/06

Keywords

  • Corrosion defect
  • Detected and undetected defect
  • Inspection
  • Pipeline
  • Reliability

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