New Revised Thermowell Standard

Companies that source thermowells for oil, gas and petrochemicals applications should now be consulting the latest, revised ASME PTC 19.3 (2010) standard, which recently underwent its first major revision in more than 35 years state Okazaki.

The 2010 standard addresses a number of new design factors that were not included in the original, more simplified standard. These include in-line resonance, fatigue factors for oscillatory stress, effects of foundation compliance, sensor mass, stress intensification factors at the root of the thermowell, and fluid mass/density.

This means the new standard should lead to a greater variety of thermowell geometries and discourages the use of velocity support collars, allowing designers to achieve faster response times than ever before in applications that call for a wake frequency calculation.