Pressure Capacity Reduction of X52 Pipeline Steel Damaged by a Semi-Elliptical Pitting Corrosion

Steel made pipelines with different diameters are used for transmitting oil and gas which in many cases are buried in soil under the sea bed or immersed in sea water. External corrosion of pipes is an important form of deterioration due to the aggressive environment of sea water. Corrosion normally results in pits. Hence, using the finite element method, namely ABAQUS software, this paper estimates the amount of pressure capacity reduction of a pipecontaining a semi-elliptical pitting corrosion and the rate of corrosion during the pipeline life of 25 years.

Authors:

• S. M. Kazerouni Sangi
• Y. Gholipour

Keywords:

• Petroleum Transmission
• Pipeline
• PressureCapacity
• Semi-Elliptical Pitting Corrosion.

References:

[1] B. A. Chouchaoui and R. J. Pick, "Behavior of circumferentially aligned
corrosion pits," Int. J. Pres. Ves. and Piping, vol. 57, pp. 187-200, 1994.
[2] F. Valenta, M. Sochor, M. Španiel, and J. Michalec, "Remaining load
carrying capacity of gas pipelines damaged by surface corrosion," Int. J.
Pres. Ves. and Piping, vol. 59, pp. 217-226, 1994.
[3] B. A. Chouchaoui and R. J. Pick, "Behavior of longitudinally aligned
corrosion pits," Int. J. Pres. Ves. and Piping, vol. 67, pp. 17-35, 1996.
[4] W. S. Kim, Y. P. Kim, Y. T. Kho, and J. Choi, "Development of limit
load solutions for corroded gas pipelines," NACE International, no.
02092, pp. 1-11, 2002.
[5] R. E. Melchers, "The effect of corrosion on the structural reliability of
steel offshore structures," Corrosion Science, vol. 47, pp. 2391-2410,
2005.
[6] T. A. Netto, U. S. Ferraz, and S. F. Estefen, "The effect of corrosion
defects on the burst pressure of pipelines," Journal of Constructional
Steel Research, vol. 61, pp. 1185-1204, 2005.
[7] A. P. Teixeira, C. Guedes Soares, T. A. Netto, and S. F. Estefen,
"Reliability of pipelines with corrosion defects," International Journal of
Pressure Vessels and Piping, vol. 85, pp. 228-237, 2008.
[8] F. Caleyo, J. L. Gonzalez, and J. M. Hallen, "A study on the reliability
assessment methodology for pipelines with active corrosion defects,"
vol. 79, pp. 77-86, 2002.
[9] M. Ahammed, "Prediction of remaining strength of corroded pressurized
pipelines," Vessel and Piping, vol. 71, pp. 213-217, 1997.
[10] M. Ahammed, "Probabilistic estimation of remaining life of a pipeline in
the presence of active corrosion defects," International Journal of
Pressure Vessels and Piping, vol. 75, pp. 321-329, 1998.
[11] M.G. Fontana, Corrosion Engineering, 3rd ed. New York: McGraw-Hill,
1986.