Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Plastic Collapse Solution for API 5L X65 Natural Gas Linepipe

천연가스 수송용 API 5L X65 배관에 대한 소성붕괴해

  • Published : 2004.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

To assess the integrity of the pipeline is the most important problem to be solved first of all for prevention of any fracture accident of the pipeline. As a result of exerting such efforts, a number of plastic collapse assessment equations have been suggested, however, the scope of using or applying such assessment equations has not been exactly defined. In this study, the case that a surface crack existed in the circumferential direction in the external side of the natural gas pipeline and a bending load was applied to the pipeline was analytically identified as the most critical condition, and a plastic collapse assessment equation fur it was suggested. The flow stress of the API X65 linepipe was defined through the experiment conducted on SENT specimens. Also, a local assessing criterion of a 3-dimensional crack behavior considering not only the crack depth but also the crack length was suggested. Finally, a plastic collapse assessment equation for the API X65 linepipe was developed by performing the 3-dimensional finite element analysis.

Keywords

References

  1. American Petroleum Institute, 1999, 'Welding of Pipelines and Related Facilities, App. A : Alternative Acceptance Standards for Girth Welds', API 1104
  2. Canadian Standards Association, 1996, 'Oil and Gas Pipeline Systems, App. K : Standards of Acceptability for Circumferential Pipes Butt Welds Based on Fracture Mechanics Principles,' CSA Z662
  3. Japan Welding Engineering Society, 1997, 'Method of Assessment for Flaws in Fusion Welded Joints with Respect to Brittle Fracture And Fatigue Crack Growth,' WES 2805
  4. British Standards Institution, 1997, 'Guidance on Methods for the Assessing the Acceptability of Flaws in Fusion Welded Structures,' BS 7910
  5. American Petroleum Institute, 2000, 'Fitness for Service,' API RP 579
  6. British Energy, 1998, 'Assessment of the Integrity of Structures Containing Defects,' R/H/R6-Revision 3, Gloucester, U.K.
  7. Huh, N. S., Park, Y. J., Kim, Y. J. and Kim, Y. J., 2003, 'New Engineering J and COD Estimation Methods for Axial Through-Wall Cracked Pipes,' Transaction of the KSME(A), Vol. 27, No. 2, pp. 239-246 https://doi.org/10.3795/KSME-A.2003.27.2.239
  8. Kim, J. S., Kim, Y. J. and Kim, Y. J., 2002, 'Fracture Behavior Estimation for Circumferential Surface Cracked Pipes (I),' Transaction of the KSME(A), Vol. 26, No. 1, pp. 131-138 https://doi.org/10.3795/KSME-A.2002.26.1.131
  9. Kim, J. S., Kim, Y. J. and Kim, Y. J., 2002, 'Fracture Behavior Estimation for Circumferential Surface Cracked Pipes (II),' Transaction of the KSME(A), Vol. 26, No. 1, pp. 139-146 https://doi.org/10.3795/KSME-A.2002.26.1.139
  10. American Society of Mechanical Engineers, 1991, 'Manual for Determining the Remaining Strength of Corroded Pipelines,' ASME B31G
  11. Det Norske Veritas, 1999, 'Corroded Pipelines,' DNV-RP-F101
  12. Kim, Y. P., Baek, J. H., Kim, W. S., and Kho, Y. T., 2002, 'The Evaluation of Burst Pressure for Corroded Pipeline by Full Scale Burst Test,' Transaction of the KSME(A), Vol. 26, No. 1, pp. 203-210 https://doi.org/10.3795/KSME-A.2002.26.1.203
  13. Nyhus, B., 1998, 'Oseberg Hyperbaric Welding Procedure Development. Fracture Mechanics Testing and ECA Analysis,' SINTEF Report
  14. Choi, J. B., 1997, 'Plastic Collapse of Circumferential Surface Defects in Pipineline Materials,' Ph. D. thesis, Univ. of Waterloo, Canada
  15. Pisarski, H.G., Goldthorpe, M. R., 1995, 'Behaviour of Semi-elliptical Cracks in Welds with Yield Strength Mismatch,' TWI Report 7160.01/95/857.2
  16. American Society for Testing & Materials, 1988, 'Standard Practice for Fracture Testing with Surface-Crack Tension Specimens,' ASTM E 740-88
  17. ABAQUS, 1998, Standard User's Manual, Ver. 5.8, Hibbitt, Karlsson & Sorensen, Inc.
  18. Miller, A. G., 'Review of Limit Loads of Structures Containing Defects,' Int. J. Pres. & Piping Vol. 32, pp.197-327 (1988) https://doi.org/10.1016/0308-0161(88)90073-7
  19. Kiefner, J.F., Maxey, W.A., Eiber, R.J. and Duffy, A.R., 1973, 'Failure Stress Levels of Flaws in Pressurized Cylinders,' ASTM STP 536, pp. 461-481
  20. Goodall, I. W., 1999, 'C* for Partially-penetrating Semi-elliptical Flaws in Plates: Propagation Through the Thickness,' ICON Report ME 196/01 Issue 2, June
  21. Sattari-Far, I., 1994, 'Finite Element Analysis of Limit Loads for Surface Cracks in Plates,' International Journal of Pressure Vessels and Piping, Vol. 57, pp. 237-243 https://doi.org/10.1016/0308-0161(94)90058-2