Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods

Imperfections or uneven surfaces of welded areas due to uncertain errors such as equipment, weld quality, or mechanical damage may cause defects or anomalies such as corrosion or cracks and lead to other failures such as burst or leakage. Corrosion tends to occur at the uneven area due to the stagna...

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Main Authors: Salina Farini Bahaman, U., Mustaffa, Z., Ben Seghier, M.E.A., Neesa Idris, N.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.33309 /
Published: American Society of Civil Engineers (ASCE) 2022
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85133682094&doi=10.1061%2f%28ASCE%29CF.1943-5509.0001750&partnerID=40&md5=1d17a5fae81fafdc3adaf77f3b2f0735
http://eprints.utp.edu.my/33309/
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spelling utp-eprints.333092022-07-26T06:40:08Z Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods Salina Farini Bahaman, U. Mustaffa, Z. Ben Seghier, M.E.A. Neesa Idris, N. Imperfections or uneven surfaces of welded areas due to uncertain errors such as equipment, weld quality, or mechanical damage may cause defects or anomalies such as corrosion or cracks and lead to other failures such as burst or leakage. Corrosion tends to occur at the uneven area due to the stagnation of the hydrocarbons for a long period, which directly can reduce the strength of the pipeline itself. This paper proposes a framework that incorporates structural reliability analysis (SRA) to analyze the safety and integrity levels of corroded girth welded API 5L X56 pipeline. By developing the limit state functions (LSFs) with reference to previous studies and existing codes and standards, the assessment was divided into two sections: assessing the pipeline as a single pipeline, and as sectional parts (girth welded area) of the pipeline. The probabilistic evaluation was carried out using Monte Carlo simulation (MCS), and the obtained results were compared in terms of the failure probability, Pf. The results demonstrated that two burst pressure models - the Shell-92 and Zhang et al. models - are highly conservative based on the failure probability, whereas the pipeline corrosion failure criterion (PCORRC) gives the most reasonable results for both general corroded and girth welded pipeline scenarios. The findings of this work also indicate that the failure probability in sectional pipes is more reliable than that in entire pipes due to the consideration of corrosion distributions in the pipeline. © 2022 American Society of Civil Engineers. American Society of Civil Engineers (ASCE) 2022 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85133682094&doi=10.1061%2f%28ASCE%29CF.1943-5509.0001750&partnerID=40&md5=1d17a5fae81fafdc3adaf77f3b2f0735 Salina Farini Bahaman, U. and Mustaffa, Z. and Ben Seghier, M.E.A. and Neesa Idris, N. (2022) Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods. Journal of Performance of Constructed Facilities, 36 (5). http://eprints.utp.edu.my/33309/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Imperfections or uneven surfaces of welded areas due to uncertain errors such as equipment, weld quality, or mechanical damage may cause defects or anomalies such as corrosion or cracks and lead to other failures such as burst or leakage. Corrosion tends to occur at the uneven area due to the stagnation of the hydrocarbons for a long period, which directly can reduce the strength of the pipeline itself. This paper proposes a framework that incorporates structural reliability analysis (SRA) to analyze the safety and integrity levels of corroded girth welded API 5L X56 pipeline. By developing the limit state functions (LSFs) with reference to previous studies and existing codes and standards, the assessment was divided into two sections: assessing the pipeline as a single pipeline, and as sectional parts (girth welded area) of the pipeline. The probabilistic evaluation was carried out using Monte Carlo simulation (MCS), and the obtained results were compared in terms of the failure probability, Pf. The results demonstrated that two burst pressure models - the Shell-92 and Zhang et al. models - are highly conservative based on the failure probability, whereas the pipeline corrosion failure criterion (PCORRC) gives the most reasonable results for both general corroded and girth welded pipeline scenarios. The findings of this work also indicate that the failure probability in sectional pipes is more reliable than that in entire pipes due to the consideration of corrosion distributions in the pipeline. © 2022 American Society of Civil Engineers.
format Article
author Salina Farini Bahaman, U.
Mustaffa, Z.
Ben Seghier, M.E.A.
Neesa Idris, N.
spellingShingle Salina Farini Bahaman, U.
Mustaffa, Z.
Ben Seghier, M.E.A.
Neesa Idris, N.
Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods
author_sort Salina Farini Bahaman, U.
title Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods
title_short Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods
title_full Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods
title_fullStr Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods
title_full_unstemmed Integrity of API 5L X56 Offshore Pipeline Subjected to Girth Weld Anomalies and Corrosion Using Probabilistic Methods
title_sort integrity of api 5l x56 offshore pipeline subjected to girth weld anomalies and corrosion using probabilistic methods
publisher American Society of Civil Engineers (ASCE)
publishDate 2022
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85133682094&doi=10.1061%2f%28ASCE%29CF.1943-5509.0001750&partnerID=40&md5=1d17a5fae81fafdc3adaf77f3b2f0735
http://eprints.utp.edu.my/33309/
_version_ 1741197834372251648
score 11.62408

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