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Fatigue failure of thermowells in feed gas supply downstream pipeline at a natural gas production plant

(in lingua inglese)

Based on the results obtained in this investigation, it can be concluded that the subject premature failure of the subject thermowells is attributed to fatigue damage, mainly due to improper selection of thermowell design for the concerned operation condition. The used flanged, straight type thermowell configuration has played a remarkable role in the initiation of fatigue damage due to higher stress concentration at its sharp neck. High stress concentration at thermowell neck and flow-induced vibration, both have shortens the lifetime of the used flanged, straight type thermowell.

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Fonte: Articolo Case Studies in Engineering Failure Analysis, 2013
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