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국부 부식을 가지는 심해저 파이프라인의 구조응답에 대한 전산 해석적 연구

Computational Analysis of Structural Behavior of Subsea Pipelines with Local Corrosion

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초록

To meet the increasing demand for energy around the world, offshore and subsea energy development is constantly being conducted. This trend is accompanied by an increasing demand for pipeline installation, which brings numerous problems, including those related toaccessibility, high pressure, and corrosion. Among these, corrosion is a primary factor in pipeline fractures, and can cause severe environmental andindustrial damage. Hence, accurate corrosion assessment for corroded pipelines is very important. For this reason, the present study investigated themechanical behavior of an idealized corroded subsea pipeline with an internal/external pressure load using the commercial FEA code ABAQUS. Then, the analysis result was compared with corrosion assessment codes such as ASME B31G, DNV RP F101, ABS. Finally, a fitness-for-serviceassessment was conducted.

Abstract

To meet the increasing demand for energy around the world, offshore and subsea energy development is constantly being conducted. This trend is accompanied by an increasing demand for pipeline installation, which brings numerous problems, including those related toaccessibility, high pressure, and corrosion. Among these, corrosion is a primary factor in pipeline fractures, and can cause severe environmental andindustrial damage. Hence, accurate corrosion assessment for corroded pipelines is very important. For this reason, the present study investigated themechanical behavior of an idealized corroded subsea pipeline with an internal/external pressure load using the commercial FEA code ABAQUS. Then, the analysis result was compared with corrosion assessment codes such as ASME B31G, DNV RP F101, ABS. Finally, a fitness-for-serviceassessment was conducted.

참고문헌 (19)

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  6. Cosham, A., "The Assessment of Corrosion in Pipelines – Guidance in the Pipeline Defect Assessment Manual(PDAM)", Pipeline Pigging and Integrity Management Conference, pp.1~31 (2004)
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  8. "Corroded Pipelines Recommended Practice F101" (2010)[URL]
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  10. Fekete, G., "The Effect of the Width to Length Ratios of Corrosion Defects on the Burst Pressures of Transmission Pipelines", Engineering Failure Analysis, 21, pp.21~30 (2012)
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  12. Ma, B., "Assessment on Failure Pressure of High Strength Pipeline with Corrosion Defects", Engineering Failure Analysis, 32, pp.209~219 (2013)
  13. Mohd, M. H., "Investigation of the Corrosion Progress Characteristics of Offshore Subsea Oil Well Tubes", Corrosion Science, 67, pp.130~141 (2012)
  14. Netto, T. A., "The Effect of Corrosion Defects on the Burst Pressure Pipelines", Journal of Constructional Steel Research, 61, pp.1185~1204 (2005)
  15. "Filtered Incident Files" (2013)[URL]
  16. "Forecast: Capex Surge in the Pipeline" (2012)[URL]
  17. Valor, A., "Reliability Assessment of Buried Pipelines Based on Different Corrosion Rate Models", Corrosion Science, 66, pp.78~87 (2012)
  18. Wang, H., "Draft : FEA of a Laminate Internal Buckle Arrestor for Deep Water Pipe-in-pipe Flowlines", Proceedings of the 28th International Conference on Ocean, pp.447~452 (2009), Offshore and Arctic Engineering
  19. Xu, L. Y., "Reliability and Failure Pressure Prediction of Various Grades of Pipeline Steel in the Presence of Corrosion Defects and Pre-strain", International Journal of Pressure Vessels and Piping, 89, pp.75~84 (2012)

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