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Thermowell vibration analysis 2

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dfdz

Electrical
Jun 28, 2010
4
Hi everybody!
Is there any limit in flow speed above which you must analyse vibration influence and below it you don´t need to?
In case there is a limit, how do you determine it?
Thanks in advance.
DFDZ
 
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I don't know the answer to your question, but I do have a copy of WellStress that runs some numbers on thermowells. Not bad for a freebie.

The software author's name and email address is on the download site. An email to him might provide a rule-ot-thumb answer. If you try him and get an answer, it would be nice to know it.

 
Thank you all.
Both comments were very helpful.
I will study the docs and I´ll be back with my comments.
DFDZ
 
Since this post was first made the ASME PTC 19.3 TW (2010) standard has been published and significantly changed the standard means of assessing wake frequency / vibration issues.

As a thermowell and sensor manufacturer hoping that we could help users like you, we built a free software application to run the new standard. Here's a link:
 
Nicely done, temperaturetalk!!

Good on ya,

Goober Dave
 
Very nice really. Thanks a lot.
DFDZ
 
I just spotted a similar interest at Control.com and remembered this thread.
It appears (courtesy Frank Johnson at Control.com) that:
ASME PTC 19.3 TW 2010 has been published and is now available at
This is a total rewrite of the calculations used to determine the wake frequency for thermowells in a flowing process.
and Frank goes on to suggest SwiftyCalc which is here:


JMW
 
I just want to throw in that SwiftyCalc RULES!!

Somebody did a super job with that one.

Good on y'all,

Goober Dave
 
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