Experimental Verification of Dents Effect on the Structural Integrity of Pipeline DN 300


Article Preview

The stress-strain behaviour of two dents with different depth and shape during the fatigue pressure and burst pressure test is described. The internal inspection carried out on a high-pressure line DN 300 revealed the presence of two dents. Then, the part containing the dents was dug out, removed from operation and the pressure tests were carried out. The stress-strain behaviour was measured with help of nine strain gauges placed on the external pipe surface in the vicinity of dents. The fatigue pressure test simulated fluctuation of pressure, temperature and landslides during operation. During the fatigue pressure test, the profile changes of dents were observed; on the other hand, no fracture occurred. It followed the pressure burst test, the results of which enabled to determine the limit state, burst pressure and position of fracture.



Edited by:

Luis Rodríguez-Tembleque, Jaime Domínguez and Ferri M.H. Aliabadi




J. Kec et al., "Experimental Verification of Dents Effect on the Structural Integrity of Pipeline DN 300", Key Engineering Materials, Vol. 774, pp. 319-324, 2018

Online since:

August 2018




* - Corresponding Author

[1] J.L. Otegui: Engineering Failure Analysis Vol. 42 (2014), pp.311-323.

[2] A. Cosham, P. Hopkins: International Journal of Pressure Vessels and Piping Vol. 81 (2004) pp.127-139.

[3] E. Mueller, X. Liu, R. Chhatre, A. Lamm: Journal of Failure Analysis and Prevention Vol. 18 (2018) pp.66-74.

[4] Information on https://www.ntsb.gov/investigations/AccidentReports/Reports/PAB1701.pdf.

[5] S.B. Cunha, I.P. Pasqualino, B.C. Pinhero: Pipeline plain dent fatigue – A comparison of assessment methodologies (10th International Pipeline Conference, Canada 2006).

DOI: https://doi.org/10.1115/ipc2014-33034

[6] C.R. Alexander, J.F. Kiefner: Effects of Smooth and Rock Dents on Liquid Petroleum Pipelines (American Petroleum Institute – Publication 1156, 1998).

[7] J. Kec, I. Cerny, J. Lustinec, R. Pavelkova: Communications - Scientific Letters of the University of Zilina Vol. 19 (2017), pp.10-14.

[8] B.C. Pinheiro, I.P. Pasqualino, S.B. Cunha: Assessment of stress concentration on dented pipelines (6th International Pipeline Conference, Canada 2006).