Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Deformation Characteristics of Gas Pipeline under Internal Pressure and In-Plane Bending Load

내압과 굽힘하중을 받는 가스배관의 변형특성에 관한 연구

  • 장윤찬 (한국가스공사 가스연구원) ;
  • 김익중 (한국가스공사 가스연구원) ;
  • 김철만 (한국가스공사 가스연구원) ;
  • 전법규 (부산대학교 지진방재연구센터) ;
  • 장성진 (부산대학교 지진방재연구센터) ;
  • 김영표 (한국가스공사 가스연구원)
  • Received : 2019.11.11
  • Accepted : 2019.12.23
  • Published : 2019.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

This paper investigates deformation characteristics of gas pipeline using the in-plane bending experiment and finite element analysis of a pipe bend. The effect of the bending angle and internal pressure on the deformation characteristics is analyzed. The pipe bend used in this study is API 5L X65 (out diameter: 20 inch) material with the thickness of 11.9 mm. The maximum load, displacement at maximum load, angle and local strain of 90° pipe bend are obtained from the in-plane bending experiment. Comparison between FE results and experimental data shows overall good agreements. In addition, the deformation characteristics of 22.5° and 45° pipe bend are calculated using the finite element analysis. As a result, the effect of the bend angle on the deformation characteristics is discussed.

Keywords

References

  1. Oh, C. S. and Kim, Y. J, 2006, "Limit load for pipe bends under combined pressure and in-plane bending based on finite element limit analysis," Trans. Korean Soc. Mech. Eng. A, Vol. 30, No. 5, pp. 505-511.
  2. Lee, G. H., Kim, Y. J., Oh, C. S., Yoo, B. and Park, C. Y., 2007, "Effect of bend angle on plastic loads of pipe bends under internal pressure and In-Plane Bending," Trans. Korean Soc. Mech. Eng. A, Vol. 31, No. 3, pp. 322-330. https://doi.org/10.3795/KSME-A.2007.31.3.322
  3. Kim, Y. J. and Oh, C. S., 2006, "Limit loads for pipe bends under combined pressure and in-plane bending based on finite element limit analysis," Int. J. Press. Ves. Pip., Vol. 83, pp. 148-153. https://doi.org/10.1016/j.ijpvp.2005.11.001
  4. Kim, N. H., Oh, C. S., Han, J. J. and Kim, Y. J., 2007, "Limit loads for pipe bends under combined pressure and in-plane bending based on finite element limit analysis, Trans. of the KPVP, Vol. 3, No.4, pp. 28-37.
  5. Fizoozabad, E. S., Jeon, B. G., Choi, H. S. and Kim, N. S., 2015, "Seismic fragility analysis of seismically isolated nuclear power plants piping system," Nucl. Eng. Des., Vol. 284, pp. 264-279. https://doi.org/10.1016/j.nucengdes.2014.12.012
  6. Neilson, R., Wood, J., Hamilton, R. and Li, H., 2010, "A comparison of plastic collapse and limit loads for single mitered pipe bends under in-plane bending," Int. J. Press. Ves. Pip., Vol. 87, pp. 550-558. https://doi.org/10.1016/j.ijpvp.2010.08.015
  7. Karamanos, S. A., Tsouvalas, D. and Gresnigt, A. M., 2006 "Ultimate bending capacity and buckling of pressurized 90 deg steel elbow" J. Press. Vess-T. ASME, Vol.128, No.3, pp.348-356 https://doi.org/10.1115/1.2217967
  8. Abdalla, H. F., 2019, "Load carrying capacities of pressurized 90 degree miter and smooth bends subjected to monotonic in-plane and out-of-plane bending loadings," Int. J. Press. Vessel Pip., Vol. 171, pp.253-270. https://doi.org/10.1016/j.ijpvp.2019.03.002
  9. Shalaby, M. A. and Younan, M. Y., 1998, "Nonlinear analysis and plastic deformation of pipe elbows subjected to in-plane bending," Int. J. Press. Vessel Pip., Vol. 75, pp.603-611. https://doi.org/10.1016/S0308-0161(98)00059-3
  10. Li, S. J., Zhou, C. Y., Li, J., Pan, X. M. and He, X.H., 2017, "Effect of bend angle on plastic limit loads of pipe bends under different load conditions," Int. J. Mechanical Sciences, Vol. 131, pp.572-585. https://doi.org/10.1016/j.ijmecsci.2017.08.019
  11. API Specification 5L, 2012, "Specification for line pipe", American Petroleum Institute.
  12. Dassault Systems, 2017, ABAQUS Analysis User's Guide, France.