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The Effect of Extreme Corrosion Defect on Pipeline Remaining Life-time

Norhazilan Md. Noor, and Nordin Yahaya, and Siti Rabeáh Othman, (2008) The Effect of Extreme Corrosion Defect on Pipeline Remaining Life-time. Malaysian Journal of Civil Engineering, 20 (1). pp. 47-57.

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Official URL: http://web.utm.my/ipasa/images/stories/MJCE/2008/vol_20_no_1/June%205%20-Norhazilan[1].pdf

Affiliations

Universiti Teknologi Malaysia. Faculty of Civil Engineering. Dept. of Structures and Materials
Universiti Teknologi Malaysia. Faculty of Civil Engineering. Dept. of Structures and Materials
Universiti Teknologi Malaysia. Faculty of Civil Engineering. Dept. of Structures and Materials

Abstract

to predict future integrity of corroding pipeline by using a combination of probabilistic analyses and simulation process. However, numerical errors arise when all the inspection data including non-extreme and extreme measured defects were used. In this study, a combination of an extreme value distribution and peaks-over-threshold method was adopted to analyse the effect of extreme data upon pipeline reliability. The paper focuses on the elimination of the “low-risk” data in the analysis in order for extreme values to be significantly emphasized. The study found that the high threshold value would lead to the high failure probability. The optimum threshold value is constrained by the number of remaining data. The selection of threshold and extreme distribution value must be cautiously carried out to minimise the possibilities of over predict the pipeline’s time to failure.

Item Type:Journal
Additional Information:The authors would like to express deep gratitude to MOSTI, MOHE and UTM for providing the research group with fund and facilities to facilitate the research activities
Keywords:Peak-Over-Threshold, extreme data, corrosion, pipelines, probabilistic
Subjects:T Technology, Engineering
ID Code:6424

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