Thermowell Velocity Rating(Program Ver. 4.3)

Company: Tag #: Project No: Date:

Reference: Rev:

U

B

d A

FLUID DATA CONSTANTS Fluid Steam 3.05 0.22

Operating Temperature 500 ºF 0.413 0.38

Operating Pressure 100 psig 49.2 1.3

Fluid Velocity V 85 ft/sec 0.075 1.0

v 5.588

WELL DATA CALCULATIONS

Well Material 304 643 Hz

Unsupported Length U 7.50 in Wake Frequency 359 Hz

Bore Diameter d 0.260 in Frequency Ratio r 0.56

Tip Diameter B 0.625 in Magnification Factor Fm 1.45

Root Diameter A 1.100 in Max Length @ V (r=0.8) Um 9.0 in

w 0.285 Max Velocity @ U (r=0.8) Vm 122 ft/sec

E 40.0 Max Static Pressure Pm 10337 psig

S 25.0 Max Stress Length Ls 111.37 in

Max Stress Velocity Vs 1262.2 fps

NOTES

These calculations are performed according to the paper "Power Test Code Thermometer Wells" by J. W. Murdock, and also

meet the requirements of ASME PTC 19.3-1998. Note that ASME PTC 19.3-1998 is NOT current and has been replaced with

ASME PTC 19.3 TW-2010 released in April, 2010. The results of running this program should only be used as a guide for

thermowell design. Thermo-Kinetics assumes no responsibility for failure of a well based on the results of these calculations,

Kf t/A

To K1 t/B

Po K2 FA

K3 FB

ft3/lb

Natural Frequency @ To fn

fw

Specific Weight @ To lb/in3

Mod of Elasticity @ To psi x 106

Allowable Stress @ To psi x 103

and accepts no liability direct or consequential, arising from error or misinformation supplied herein, or due to program misuse.