The Effect of Pressure on Burnthrough Susceptibility during in-Service Welding

Abstract:

3D finite element models have been developed for X70 pipelines during the in-service welding. These models have been used to analyze the effects of internal pressure on the susceptibility of burnthrough. The work has showed that radial deflection could be regarded as a burnthrough limit. The same internal pressure has more important effect on the thinner materials and bigger diameter pipes. Internal pressure also has a great impact on the temperature profiles and the thermal cycle of inside surface. For thinner materials, Battelle’s 982°C temperature limit is overly conservative.

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 2313-2317
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.2313
• Online since: October 2011
• Authors: Wei Liu, Han Tao, Chao Wen Li, Guang Fei Guo, Guo Lin Gu
• Keywords: Burnthrough, In-Service Welding, Numerical Simulation, Radial Deflection

References

[1] Bruce W A, and Amend W E, Guidelines for pipeline repair by direct deposition of weld metal. Presented at WTIA/APIA Welded Pipeline Symposium, Welding Institute of Australia, Sydney, Australia, April 3, (2009).

[2] Li Chaowen, Wang Yong, and Li Liying, Numerical and experimental study of in-service welding on thin plate. 2010 2nd International Conference on Computer Engineering and Technology.

DOI: 10.1109/iccet.2010.5486352

[3] Chen Yuhua, Study on the in-service weldability of X70 Pipeline steel [D]. Dongying, China University of Petroleum, (2006).

[4] A.P. Cisilino, M.D. Chapetti, and J.L. Otegui, Minimum thickness for circumferential sleeve repair fillet welds in corroded gas pipelines. International Journal of Pressure Vessels and Piping. Vol. 79 (2002), pp.67-76.

DOI: 10.1016/s0308-0161(01)00123-5

[5] M.A. Wahab, P.N. Sabapathy, and M.J. Painter, The onset of pipewall failure during in-service welding of gas pipelines. Journal of Materials Technology. Vol. 168 (2005), pp.414-442.

DOI: 10.1016/j.jmatprotec.2004.12.001

[6] Matthew A. Boring, Wei Zhang, and Willian A. Bruce, Improved burnthrough prediction model for in-sevice welding. Presented at Proceedings of IPC2008, 7th International Pipeline Conference, Calgary, Alberta, Canada, (2008).

DOI: 10.1115/ipc2008-64353

[7] P.N. Sabapathy, M.A. Wahab, and M.J. Painter. Numerical methods of in-service welding of gas pipelines. Journal of Materials Technology. Vol. 118 (2001), pp.14-21.

DOI: 10.1016/s0924-0136(01)01032-9

[8] Mo Chunli, Qian Bain, Guo Xuming, and Yu Shaofei, The development of models about welding heat source calculation. Transactions of the China Welding Institution. Vol. 22 (2001), pp.93-96.

[9] Farid Vakili-Tahami, Mohammad Zehsaz and Mohammad-Ali Saeimi-Sadigh, The effect of welding parameters on the burnthrough during in-service welding of 316 Stainless steel T Joint Branch Connections. Recent Patents on Mechanical Engineering. Vol. 3 (2010).

DOI: 10.2174/1874477x11003010072

[10] Li Chaowen, Burnthrough failure mechanism and safety evaluation of in-service welding of long-distance pipeline [D]. Dongying, China University of Petroleum, (2011).

[11] P.N. Sabapathy, M.A. Wahab, and M.J. Painter, The prediction of burn-through during in-service weldingof gas pipelines. International Journal of Pressure Vessels and Piping. Vol. 77 (2000), pp.669-677.

DOI: 10.1016/s0308-0161(00)00056-9