Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)

Inspection data obtained from in-line inspection is useful to assess present integrity as well as to predict future integrity of pipeline by using statistical and probabilistic analyses and simulation process. However, numerical errors arise when all the inspection data are used in the analysis. Num...

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Main Author:	Ann, See Peng
Format:	Thesis
Language:	English
Published:	2008
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/11446/1/AnnSeePengMFKA2008.pdf
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spelling	my-utm-ep.114462018-07-23T05:37:10Z Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline) 2008-06 Ann, See Peng TA Engineering (General). Civil engineering (General) Inspection data obtained from in-line inspection is useful to assess present integrity as well as to predict future integrity of pipeline by using statistical and probabilistic analyses and simulation process. However, numerical errors arise when all the inspection data are used in the analysis. Numerical error arises because failure probability due to a single extreme corrosion out of huge quantity of corrosion data has been greatly reduced. Thus, in this study, extreme values analysis using extreme value theory, peaks-over-threshold method or combination of both methods is adopted to analyze the inspection data. This aims to eliminate the “low-risk” data in the analysis in order for extreme values to be emphasized. Based on the result, high threshold value will lead to high failure probability. However, the optimum threshold value is limited by the number of remaining data. Meanwhile, extreme value distribution is also efficient in indicating an early failure probability. Instead, combination of both methods results an overestimated failure probability. 2008-06 Thesis http://eprints.utm.my/id/eprint/11446/ http://eprints.utm.my/id/eprint/11446/1/AnnSeePengMFKA2008.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering Boyun, G., Shanhong, S., Jacob, C. and Ali, G., (2005). Offshore Pipelines. Oxford: Gulf Professional Publishing Cramer, E., Gharpuray, D., Marley, M., Sigurdsson, G. and Bjornoy, O.H. (1999). Risk Based Assessment of Corroded Pipelines. Kuala Lumpur: OGM’99. 1-17. DNV (1999). Recommended Practice RP-F101 for Corroded Pipelines 1999. Norway: Det Norske Veritas. Dodson, B. (1994). Weibull Analysis. Milwaukee: ASQC Quality Press. 1-5. Escoe A. K. (2006). Pigging and Pipelines Assessment guide. Oxford: Gulf Professional Publishing Hellevik, S.G. and Langen, I. (2000). In-Service Inspection Planning of Flow lines Subjected to CO2 Corrosion. Seattle, USA: ISOPE 2000, Proceeding of the 10th International Offshore and Polar Engineering Conference. May 28-June 2. Vol IV. 372-379. Lewis, E.E. (1996). Introduction to Reliability Engineering, 2nd Edition. New York: John Wiley & Sons, Inc. Melchers, R.E. (1999). Structural Reliability Analysis and Prediction, 2nd Edition. Chichester, UK: Ellis Herwood. 1-125. Noor, N.M. (2002). Reliability-Based Assessment of Offshore Pipeline Subjected to Internal Corrosion. University Teknologi Malaysia: Master Thesis. Pandey, M.D. (1997). Probabilistic Models for Condition Assessment of Oil and Gas Pipeline. NDT & Engineering International. 31(5). 349-358. Roberge, P.R. (1999). Handbook of Corrosion Engineering. New York: McGraw-Hill Companies. 1-5. Tiratsoo, J.H.N. (1992). Pipeline Pigging Technology. Houston, Gulf Publishing Company. Yahaya, N. and Wolfram, J. (1999). The Application of Peaks-Over-Threshold Approach on The Structural Reliability of Corroding Pipelines. Jurnal Teknologi. 30. 51-68. Yong B. (2001). Pipelines and Risers. Oxford: Gulf Professional Publishing
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ann, See Peng Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
description	Inspection data obtained from in-line inspection is useful to assess present integrity as well as to predict future integrity of pipeline by using statistical and probabilistic analyses and simulation process. However, numerical errors arise when all the inspection data are used in the analysis. Numerical error arises because failure probability due to a single extreme corrosion out of huge quantity of corrosion data has been greatly reduced. Thus, in this study, extreme values analysis using extreme value theory, peaks-over-threshold method or combination of both methods is adopted to analyze the inspection data. This aims to eliminate the “low-risk” data in the analysis in order for extreme values to be emphasized. Based on the result, high threshold value will lead to high failure probability. However, the optimum threshold value is limited by the number of remaining data. Meanwhile, extreme value distribution is also efficient in indicating an early failure probability. Instead, combination of both methods results an overestimated failure probability.
format	Thesis
qualification_level	Master's degree
author	Ann, See Peng
author_facet	Ann, See Peng
author_sort	Ann, See Peng
title	Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
title_short	Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
title_full	Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
title_fullStr	Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
title_full_unstemmed	Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
title_sort	extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2008
url	http://eprints.utm.my/id/eprint/11446/1/AnnSeePengMFKA2008.pdf
_version_	1747814855912456192

Extreme growth behaviour of corrosion pit in hydrocarbon pipeline (case study of ø242.1mm pipeline)

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