![]() ![]() In fact, we are the only thermowell supplier who can provide customers with credible design alternatives to standard tapered, straight and stepped thermowells,” adds Chant. However, for oil and petrochemical pipeline applications, Okazaki has always taken liquid density or mass into account when sizing thermowells. For example, the original ASME standard did not provide guidance on liquid mass, as the standard was originally developed for steam applications. This means that the design of the thermowell is critical. This means the new standard should lead to a greater variety of thermowell geometries and discourages the use of velocity support collars, allowing designers to achieve faster response times than ever before in applications that call for a wake frequency calculation.Ĭhris Chant, Business Development Manager at Okazaki Manufacturing Company (OMC) comments: “Today, petrochemical plants tend to use smaller diameter pipelines but with higher fluid velocities. These include in-line resonance, fatigue factors for oscillatory stress, effects of foundation compliance, sensor mass, stress intensification factors at the root of the thermowell, and fluid mass/density. The 2010 standard addresses a number of new design factors that were not included in the original standard. The new ASME PTC 19.3 standard has now grown from four pages up to more than 50 and so engineers need to be certain that they understand the changes involved. Subscribe to PII Magazine, E-newsletter and Podcast - for free!
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