Estimating the Long-Term Reliability of Steel and Cast Iron Pipelines Subject to Pitting Corrosion

Water-injection, oil production and water-supply pipelines are prone to pitting corrosion that may have a serious effect on their longer-term serviceability and sustainability. Typically, observed pit-depth data are handled for a reliability analysis using an extreme value distribution such as Gumbe...

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Bibliographic Details
Published inSustainability Vol. 13; no. 23; p. 13235
Main Authors Melchers, Robert E., Ahammed, Mukshed
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2021
Subjects
Asset management
Corrosion
Pipelines
Random variables
Steel
Values
Water mains
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Summary:Water-injection, oil production and water-supply pipelines are prone to pitting corrosion that may have a serious effect on their longer-term serviceability and sustainability. Typically, observed pit-depth data are handled for a reliability analysis using an extreme value distribution such as Gumbel. Available data do not always fit such monomodal probability distributions well, particularly in the most extreme pit-depth region, irrespective of the type of pipeline. Examples of this are presented, the reasons for this phenomenon are discussed and a rationale is presented for the otherwise entirely empirical use of the ‘domain of attraction’ in extreme value applications. This permits a more rational estimation of the probability of pipe-wall perforation, which is necessary for asset management and for system-sustainability decisions.
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ISSN:2071-1050
2071-1050
DOI:10.3390/su132313235