A principal stress model is proposed as a basis for
selection in high-velocity or corrosive services
Specifying the pressure rating and use of corrosion resistant materials is usually sufficient to guarantee mechanical integrity of thermowells. However, in high-velocity fluids, a more comprehensive basis for selection is needed.
Fig. 1. Cantilever coordinates for the continuous
beam model.
Current velocity rating tables are usually based on a nominal steam or condensate service to serve as a guide for thermowell selection. Murdock's stress model (1959) and its companion, the ASME Performance Tes
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