Selection method addresses thermowell integrity

An improved thermowell selection method reduces the risk of thermowell misapplication and failure that result from flow-induced vibration.It is based on a principal stress model of the thermowell and uses allowable-stress data as defined in the relevant piping codes. Its benefits are demonstrated by evaluations of three, case-study failures taken from gas pipeline applications.Modern thermowells are extremely reliable. This is largely due to the use of high-strength, corrosion resistant materials and improved manufacturing. But it would be incorrect to suggest that they cannot fail.For example, the risk of thermowell fatigue has reemerged as a critical issue in the case of temperature-co...

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