![]() The old PTC 19.3 standard, however, was extremely limiting in terms of what geometries could be used, provided no clear guidance on how to deal with issues such as shielding and, significantly, did not address the phenomenon of in-line resonance at all. The benefits of the former ASME PTC 19.3 calculation were that it was short, fairly simple to apply and generally successful in steam applications for predicting mechanical failures. It is the only US standard evaluating the mechanical strength of thermowells and is often referred to as a wake frequency calculation or a “Murdock Calculation”. ![]() A Bit of Background on ASME PTC 19.3 Historyįor 35 years the PTC 19.3 has remained essentially unchanged. This software is perfect for faster response time and increased reliability in your temperature measurement system. The software also provides you with instant theoretical maximums for insertion length and flow rate. Save your results to your own account and return later to modify on the fly. Thermowell design calculation software based upon your material requirements and process variables that you can count on to meet the ASME PTC 19.3-TW standard. ![]() There are new geometries, new requirements, new capabilities and more than 60 new pages of math and physics calculations to boot in the ASME PTC 19.3-TW (2016). The only US Standard regarding the strength of thermowells has just had its first significant revision in 35 years. ![]()
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