Title of article :
Prognosis of Time to Failure of Corroding Pipelines
Author/Authors :
Yasseri, Sirous F Brunel University London, UK , Bahai, Hamid Brunel University London, UK
Abstract :
The oil and gas pipelines are significant assets in Iran. However, these assets
are subject to degradation from corrosion. Corrosion causes gradual thinning
of the pipelines’ wall leading to leaks or bursts. Allowing a corroding pipeline
to continue operation may lead to a finite risk of exceeding the limit state of
burst. Codes of practice, such as Modified ASME B31G [1] and DNV F101
[3], among others, have developed relationships to determine the bursting
pressure of corroded pipelines. The purpose of this paper is to develop, test,
and illustrate a simple spreadsheet-based probabilistic procedure that can be
used by practicing engineers to determine the Remaining Useful Life (RUL)
of a corroding pipeline, following its first inspection. Modified ASME B31G
and DNV F101 equations are used to illustrate this method. As new inspection
data regarding the extent of corrosion becomes available, the results can be
updated and a new probability of failure can be obtained. The calculated
probability of failure is then compared with the target values to determine the
remaining life. The approach is equally applicable to both onshore and
offshore oil and gas pipelines.
Keywords :
Pipeline corrosion , Pipeline integrity management , Remaining useful life (RUL) , Modified B31G , DNV F101 , Fitness-For-Service (FFS) , Reliability assessment , Time-dependent wall thinning , Time to failure
Journal title :
Astroparticle Physics
