ASME PTC 19.3 TW-2016

ASME PTC 19.3 TW-2016

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This Standard applies to thermowells machined from bar stock and includes those welded to or threaded into aflange as well as those welded into a process vessel or pipe with or without a weld adaptor. Thermowells manufacturedfrom pipe are outside the scope of this Standard.

Thermowells with specially designed surface structures (e.g., a knurled surface or a surface with spiral ridges)are beyond the scope of this Standard, due to the difficulty of providing design rules with broad applicability forthese types of thermowells.

Thermowell attachment methods, standard dimensions, parasitic vibration of a sensor mounted inside the thermowell,and thermal equilibrium of the sensor relative to the process stream are beyond the scope of this Standard.In addition, thermowells fabricated by welding, including flame spray or weld overlays, at any place along thelength of the shank or at the tip are outside the scope of this Standard.

The application of the overlay to a bar-stock thermowell may affect any number of critical attributes such asnatural frequency, damping, material properties, or surface finish. These changes are difficult to account for in thecalculations, therefore, there is risk that an inappropriately designed thermowell could be installed.

Product Details

Published:
02/26/2016
ISBN(s):
9780791870433
ANSI:
ANSI Approved
Number of Pages:
62
File Size:
1 file , 810 KB
Redline File Size:
2 files , 4.7 MB

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