Abstract

Shallow sea gas pipelines usually operate in complicated and changeable regional environments and can generate corresponding stresses and displacement under the influence of internal pressures, earthquakes, waves and other loadings. An unevenly distributed stress will lead to shallow sea gas pipeline failure easily. In order to ensure the safety of pipeline, it is necessary to research the stress conditions of the shallow sea gas pipeline and check whether it can meet the safety requirements or not. In this study, we analyze the stress conditions of shallow sea gas pipelines of two laying modes in XX areas using stress analysis software CAESAR II, discuss the loading conditions under the operating condition and determine the position of the key point where pipeline damage is most likely to happen, the bend pipe. The comprehensive experiments show that underground method more secure than the sea-bed method, it greatly improves the reliability of the shallow sea pipeline running. Our research provides a theoretical basis for the construction of shallow sea gas pipelines.

Keywords:

CAESAR II, gas pipeline, shallow sea, stress analysis,

References

1. CNPC, 1995. Oil Ground Engineering Design Manual Long-Distance Gas Transmission Pipeline Engineering Design. The University of Petroleum Press. Dongying Shandong, China.
   
2. Huang, K., S.J. Wu and H.F. Lu, 2012. Stress analysis of pipeline laid along the slope. J. Nat. Gas Oil, 30(4): 1-4.
   
3. Sha, X.D., X.H. Chen and K. Huang, 2013. Analysis on factors affecting stress in gas pipeline. J. Nat. Gas Oil, 31(1): 1-4.
   
4. Tang, Y., 2003. Pressure Piping Stress Analysis. Sinopec Group Press, China.
   
5. The American Society of Mechanical Engineers, 2010. Gas Transmission and Distribution Piping Systems. ASME B31.8-2010.
   Direct Link
6. Wang, J.P., 2002. Application of CAESAR II in oilfield process design. J. Petrol. Plan. Eng., 13(2): 26.
   
7. Wang, M.T., Y. He and L. Wang, 2009. Development and application of X80 pipeline steel in the second west-east gas pipeline project. J. Electr. Welding Mach., 39(5): 6-14.
   

Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.