Failure pressure estimation for an aged and corroded oil and gas pipeline: A finite element study

J. C. Velázquez, N. E. González-Arévalo, M. Díaz-Cruz, A. Cervantes-Tobón, H. Herrera-Hernández, E. Hernández-Sánchez

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The mechanical behavior of an aged pipeline, affected by localized and generalized corrosion defects, is investigated using the finite element method. A sample of pipeline steel was aged artificially via an isothermal process (which represents the natural aging transformations), to obtain the mechanical characteristics. In real scenarios, oil and gas pipelines undergo deterioration owing to both aging and corrosion defects.Therefore, this research studies the assessment of failure pressure by combining these two types of deterioration using the finite element method. To calibrate the methodology proposed for estimating the pipeline failure pressure,data from real-scale burst tests published by the Pipeline Research Council International (PRCI) was used. Following the simulations, the initial failure region for each type of defect was determined and analyzed. Similarly, the estimated values of pipeline failure pressure were compared to assess the results obtained through finite element analysis, considering the changes in mechanical characteristics caused by the artificialartificial aging of the steel. In addition, these results were compared with those of certain well-known semiempirical models. Finally, for the different types of corrosion defects investigated in this study, the effects of volumetric loss on the estimation of pipeline failure pressure using finite elements are discussed. The main conclusion of this study is that failure pressure can be estimated more accurately by considering both corrosion defects characteristics and variations in the steel properties caused by aging.

Original languageEnglish
Article number104532
JournalJournal of Natural Gas Science and Engineering
Volume101
DOIs
StatePublished - May 2022

Keywords

  • Artificial aging
  • Burst pressure models
  • Corrosion defects
  • Failure pressure
  • Finite element method
  • Material volume loss
  • Pipeline steel

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