Reliability Assessment of Pipelines with River-Bottom Corrosion Profile
Palavras-chave:
Corroded Pipeline, Reliability, Structural Integrity, GPU computingResumo
The structural integrity assessment of pipelines can be performed through inspection, standards, and
computer simulations. Although these methodologies are widely used, the data used for the evaluations have some
uncertainties and these must be taken into account by the pipeline engineers. Based on inspection data, of the river-
bottom corrosion profile, eleven specimens taken from a brazilian pipeline will be analysed. The present work will
make a comparison between the use of different semi-empirical standards for the evaluation of structural integrity
of corroded pipelines, using First Order Reliability Method (FORM) for reliability analysis. The problem of
reliability analysis of corroded pipelines with idealized defects has been extensively addressed in the literature, but
there are still few studies considering complex corrosion profiles. In this work, we will apply some semi-empirical
equations found in international standards such as DNV RP F101, ASME B31G, modified ASME B31G, and
RSTRENG Effective Area (river-bottom profile). The results of the probability of failure will be compared with
each other, presenting the main conclusions in the use of each standard. To speed up the computation of failure
pressures, parallel programming in GPU (Graphics Processing Units) is used.
