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Chapter 76
A Unified Modeling of Hydrogen-Induced Cracking in Steel Pipelines

Excerpt

This paper presents a comprehensive finite element model for the numerical simulation of Hydrogen-Induced Cracking (HIC) in steel pipelines exposed to a H2S containing environment. The model is able to account for the pressure buildup mechanism, related to the recombination of atomic hydrogen into hydrogen gas within the crack cavity, and the induced crack extension. To enhance the predictive capabilities of the model, problem boundary conditions were based on actual in-field operating parameters, such as pH and H2S partial pressure. The numerical model was used to investigate the influence of various geometrical and material parameters on the crack growth initiation and crack growth rate. Finally, numerical results are found to be in good agreement with experimental data retrieved from the literature.

  • Introduction
  • Description of the Proposed Model
  • Results and Discussion
  • Conclusions
  • Acknowledgments
  • References

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