Retractable Sample Probe
Retractable Sample Probe
(OP)
Hello Members,
Could anyone share how to calculate the Wake Frequency for Retractable Sample Probe?
thank you
Could anyone share how to calculate the Wake Frequency for Retractable Sample Probe?
thank you





RE: Retractable Sample Probe
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RE: Retractable Sample Probe
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Retractable Sample Probe
A quick Google search yields the following links which may be useful;
- http://www.emersonprocessxperts.com/2013/01/online...
- http://www.eng-tips.com/viewthread.cfm?qid=280642
RE: Retractable Sample Probe
With sample tubes, you have to concern yourself with a different set of criteria than used for thermowells. Same equations more of less but different priorites...
RE: Retractable Sample Probe
http://docslide.us/documents/probe-calculation.htm...
RE: Retractable Sample Probe
Both standards contain wake frequency and bending moment calculations for sample probes.
ASME PTC 19.3TW is a right pain to use for sample probes, particularly retractable ones. This is due to the additional length required to insert the retractable probe through the isolation ball valve (and even worse when it's DBBV). This is even more true for the 2010 onwards editions of the standard as the required probe diameters needed to pass the calcs render the probes basically unusable on standard sampling connections (generally 2" max flange).
However as suggested above it's best to consult your sample probe vendor as they (should) have all these calculations and can advise on the most appropriate design to suit each particular installation.