Residual Strength Analysis of Oil and Gas Pipelines with Different Corrosion Depths

Jiajie Wang; Yi Fan; Tinglong Hu; Yesai Li

doi:10.62051/ijnres.v4n3.05

Authors

Jiajie Wang
Yi Fan
Tinglong Hu
Yesai Li

DOI:

https://doi.org/10.62051/ijnres.v4n3.05

Keywords:

Finite element model, Oil and gas pipelines, Residual strength.

Abstract

In this study, a finite element model has been created to evaluate the residual strength of oil and gas pipelines under varying degrees of corrosion. In pipelines affected by corrosion, the highest stress typically concentrates in the damaged area due to the detachment of material caused by corrosion, which weakens the pipeline's structural integrity. The maximum stress varies with different levels of defect depth; as the defect becomes more severe, the peak stress in the pipeline increases. If the defect depth remains below 6 mm, the pipeline's strength is sufficient to meet operational requirements and prevent failure.

References

[1] Kinfer J F. Corroded pipe: strength and repair methods. Fifth Symposium Line Pipe Research Paper L1[C], USA, 1971.

[2] Kinfer J F, Vieth P H. New method corrects criterion for evaluation corroded pipe[J]. Oil and Gas Journal, 1992, 90(42):84-89.

[3] ASME (American Society of Mechanical Engineering), 1991. ASME (American Society of Mechanical Engineering), Manual for Determining the Remaining Strength of Corroded Pipelines. ASME B31G-1991, New York, USA.

[4] Kiefner, J.F., Vieth, P.H., 1990. Evaluating PIPE-1 new method corrects criterion for evaluating corroded pipe. Oil Gas J 88 (32), 56-59.

[5] Klever, F.J., Steward, G., 1995. New Developments in Burst Strength Prediction for Locally Corroded Pipes. Shell Int Research, Copenhagen.

[6] API RP579-2010. Fitness for Service. American Petroleum Institute[S]. 2010, First edition, January.

[7] DNV-RP-F101, Recommend practice corroded pipelines[S], Det Norske Veritas, Norway, 2004.

[8] Femando D, Claudio R. Structural integrity assessments of high pressure pipelines with axial flaws using a micromechanics model[J]. International Journal of Pressure Vessels and Piping, 2004, 81:761-770.