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October 9, 2025

Analysis of Bolt Fracture Failure of Floating Head Cover for Heat Exchanger in Medium Pressure Hydrogenation Unit

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Authors

HHHuasheng HuLWLei WangJLJiayue Liu

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Overview

Investigation reveals sulfide stress corrosion cracking as the main cause of bolt fracture in a heat exchanger.

Key Points

  • The primary cause of the bolt fracture is sulfide stress corrosion cracking in a wet hydrogen sulfide environment.
  • High-strength steel bolts showed high hardness but reduced impact toughness due to harsh working conditions.
  • Corrosion pits on the stud surface led to an instantaneous fracture near the center of the bolt.
  • Recommendations include sulfur content control and improved bolt inspection to prevent future failures.

Cite This Study

Hu et al. (2025) studied this question.

synapsesocial.com/papers/68e8439a9989581a2fd4e1f6https://doi.org/10.1115/pvp2025-152850
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