Frequently Asked Questions

Wake Frequency Calculator is a guided thermowell design-checking tool. Start with the essential process and drawing values for a preliminary design view, then add the engineering detail needed for a complete wake-frequency, stress, fatigue and pressure assessment.

The calculator uses selected calculation methods from ASME PTC 19.3 TW-2016. The calculated outcome and engineering-review status are shown separately. Conditions outside an implemented method are identified rather than given an unsupported PASS. The tool is an engineering aid, not ASME certification or design approval.

Thermowell manufacturers and the process, instrumentation, mechanical and piping engineers who develop, specify or review thermowells. The same workflow supports early design screening and a more detailed engineering assessment.

Straight, tapered, and stepped stem profiles. Each profile uses the appropriate ASME correction factors and geometry calculations.

The workflow supports flanged, flanged full-penetration welded, lap-joint / Van Stone, threaded / screwed, welded-in and socket-welded construction, with connection-relevant mounting and pressure inputs.

The calculator does not embed or infer flange pressure-temperature ratings. For a flanged design, enter the applicable Pf from a controlled project, manufacturer, standard-table or verified calculation source, with its document/revision and confirmation at design temperature. Without it, the report can state whether the calculated stem and tip checks Pc/Pt pass, but clearly marks Pf NOT EVALUATED and does not claim a complete flange or Pr pressure PASS.

Select the thermowell material designation and the calculator automatically supplies the density, temperature-dependent modulus, allowable stress, material class and fatigue basis used by the calculation. Expert users can replace those values only when verified project-specific material data is required.

You can generate a PDF assessment and save calculation reports to your account. Read the calculated outcome together with the separate review status and any incomplete checks; a downloaded report does not itself establish engineering approval.

Use the contact form for questions about access, using the calculator or reporting a problem.

Use the contact form for help operating the calculator or reporting a product issue. Project-specific design decisions and final acceptance must be made by a competent engineer responsible for the installation.