Fatigue failure of flanged thermowell

Ahmad Ivan Karayan, Yudha Pratesa, Ahmad Ashari, Deni Ferdian

Research output: Contribution to journalReview articlepeer-review

2 Citations (Scopus)


A fractured flanged thermowell was received for analysis. The fracture was located at the root of "U" insertion/immersion length which was welded to the flange. The failure of flanged thermowell was attributed to the vortex-induced fatigue. The failure was initiated by the weld failure to withstand the fluctuating load resulted from vortex after years of service. This weld failure then created stress raisers, as evidenced by the ratchet marks and river marks near the outer surface.

Original languageEnglish
Pages (from-to)487-492
Number of pages6
JournalJournal of Failure Analysis and Prevention
Issue number5
Publication statusPublished - Oct 2011


  • Failure analysis
  • Fatigue analysis
  • Ferrous metals


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