eprintid: 16702
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/67/02
datestamp: 2023-12-19 03:23:13
lastmod: 2023-12-19 03:23:13
status_changed: 2023-12-19 03:06:44
type: article
metadata_visibility: show
creators_name: Ben Seghier, M.E.A.
creators_name: Mustaffa, Z.
creators_name: Zayed, T.
title: Reliability assessment of subsea pipelines under the effect of spanning load and corrosion degradation
ispublished: pub
keywords: Gas industry; Importance sampling; Pipeline corrosion; Seawater corrosion; Steel corrosion; Submarine pipelines; Water pipelines, Corrosion degradation; Extreme environment; Failure Probability; Local buckling; Oil and Gas Industry; Reliability assessments; Spanning load; Structural reliability; Sub-sea pipelines; Vortex induced vibration, Reliability analysis
note: cited By 15
abstract: Subsea pipelines are delicate infrastructures with high importance to the oil and gas industry. These structures are surrounded by an extreme environment, in which free spanning is a major issue that can lead to several unwanted events such as local buckling or vortex-induced vibration. Moreover, corrosion is inevitable problem to these structures. All these problems highly reduce the safety levels of subsea pipelines. Hence, this paper proposes a new framework for the probabilistic analysis of subsea pipelines subjected to both free spanning and corrosion degradation. For the subsea pipeline, new limit state functions are developed that include failure modes due to corrosion degradation and spanning loads caused by the maximum bending stress. In addition, new probabilistic burst pressure models for corroded pipelines have been included, taking into consideration pipeline steel grade strength as well as the surrounding uncertainty. The importance sampling method is proposed to estimate the reliability analysis results in terms of failure probability and reliability index. The proposed framework is applied on a real case study of API 5 L X65 subsea pipeline. The impact of several parameters on the reliability analysis outcome are investigated and discussed through several scenarios. Results indicate the importance of early-inspection data for planning the suitable operating regime of the pipeline in terms of internal pressure, which can be used to estimate the allowable critical spanning lengths and corrosion defect geometries to alert the appropriate actions to avoid failures. © 2022 Elsevier B.V.
date: 2022
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128471763&doi=10.1016%2fj.jngse.2022.104569&partnerID=40&md5=d017a077a7643f5c73a8b31312894eb3
id_number: 10.1016/j.jngse.2022.104569
full_text_status: none
publication: Journal of Natural Gas Science and Engineering
volume: 102
refereed: TRUE
issn: 18755100
citation:   Ben Seghier, M.E.A. and Mustaffa, Z. and Zayed, T.  (2022) Reliability assessment of subsea pipelines under the effect of spanning load and corrosion degradation.  Journal of Natural Gas Science and Engineering, 102.   ISSN 18755100