An experimental and analytical investigation into the 3D hot bend of API 5L X65 pipeline

Jong Hyun Baek, Young Pyo Kim, Woo Sik Kim, Chang Kyun Oh, Yun Jae Kim, Chang Sung Seok

Research output: Contribution to conferencePaper

Abstract

Pipelines for natural gas transmission may be subjected to plastic deformation by an outside force such as ground subsidence, ground liquefaction, hot bending, cold bending and mechanical damage. Plastic deformation affects the tensile properties and fracture toughness. Tensile test, Charpy impact test and S-N fatigue test were conducted on an API 5L X65 pipe to investigate the mechanical properties of pipeline subjected to plastic deformation during 3D hot bend. Tensile and fatigue test revealed that yield strength, tensile strength and fatigue strength of the extrados of the 3D bend were higher than those of the intrados of the 3D bend. However, Charpy impact energy of the intrados of the 3D bend was higher than that of the extrados of the 3D bend. There is no variation of strain at the crown according to the numerical analysis to the 3D hot bend. The equivalent strain up to 19 % shows in the side of the intrados of the 3D bend. The equivalent strain up to 15 % displays in the side of the extrados of the 3D bend.

Original languageEnglish
Pages955-962
Number of pages8
DOIs
Publication statusPublished - 2007 Aug 6
Externally publishedYes
Event2006 6th International Pipeline Conference, IPC 2006 - Calgary, AB, Canada
Duration: 2006 Sep 252006 Sep 29

Conference

Conference2006 6th International Pipeline Conference, IPC 2006
CountryCanada
CityCalgary, AB
Period06/9/2506/9/29

ASJC Scopus subject areas

  • Engineering(all)

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    Baek, J. H., Kim, Y. P., Kim, W. S., Oh, C. K., Kim, Y. J., & Seok, C. S. (2007). An experimental and analytical investigation into the 3D hot bend of API 5L X65 pipeline. 955-962. Paper presented at 2006 6th International Pipeline Conference, IPC 2006, Calgary, AB, Canada. https://doi.org/10.1115/IPC2006-10237