Calculate the Maximum Permissible Thermowell Length - Intergraph Smart Instrumentation - Help

Intergraph Smart Instrumentation Help

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English
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Intergraph Smart Instrumentation
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Smart Instrumentation Version
13.1

A thermowell, inserted into a pipe, enables you to calculate tag temperature. This procedure shows you how Smart Instrumentation calculates the maximum permissible length of a thermowell. The calculation is based on the maximum frequency that the thermowell can withstand. The calculation complies with ASME PTC 19.3 Standard.

  • By default, Smart Instrumentation updates tag values from the current unit of measure to their value in a new unit of measure that you set. If on the Options menu you clear Automatic Unit Conversion, the software changes the unit of measure without recalculating the values. Therefore, to protect the integrity of your values, on the Options menu, select Automatic Unit Conversion.

  • To highlight the fields that are required for a calculation, on the Options menu, select Highlight Process Data.

  1. Open a thermowell calculation item.

  2. If you defined multiple process cases, from the Case list, select the case that you want to calculate.

  3. Make sure that you enter process data in all the fields in the data sheet that are required for calculation.

  4. Select Save Icon 16bit to save the values.

  5. Select to open the Thermowell Calculation window.

  6. Select the appropriate velocity: minimum, normal, or maximum.

  7. Select the required values from the Nominal size of sensing element list.

  8. Enter additional values as need, and select Calculate.

  9. When done, select Cancel to return to the main calculation window for a temperature item.