ASME PTC TW was written to replace ASME PTC following some catastrophic failures in non-steam service, these thermowells passed the. Since then, ASME PTC TW has been applied successfully worldwide in all industries whose processes are subject to high loads. standard, known as ASME PTC TW (“TW” for thermowell), is over 40 pages due to the explanations of theory and the sheer complexity of the process.

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What Has Changed with the 2016 Revision of the ASME PTC 19.3 TW Standard?

Subscribe to the newsletter. Such an in-line resonance was not considered in the original calculation basis from In there was a serious accident at the Japanese nuclear power plant in Monju. Main Germany Company Profile Contact. KG Klingenberg a. Dos Santos International; Picture: How to Phc Product Piracy.

As a consequence of the Monju incident, the ASME standard from was completely revised and the result was published in Chemical Safety Board; Picture: Select a picture to asem the gallery 8 Pictures. It was caused by the rupture of a thermowell due to turbulence: It stands as the benchmark: You want to use it for your own purpose?


This edition of the standard only considered the more frequently occurring vibrations at right angles to the flow direction. How this translates into figures is shown in the table see picture gallery.

What Has Changed with the Revision of the ASME PTC TW Standard?

For the case, which cannot be completely eliminated, of a thermowell rupture resulting from in-line resonance, the standard demands safety provisions to prevent severe injury to personnel or damage to the plant. Furthermore, the process medium must not adversely affect the fatigue strength of the thermowell material. Scientific Image of the Day: Our portfolio can be seen here. News from process industries from all over the world. As expected passing through this in-line resonance is the responsibility of the plant owner.

The provisions that it contained for the wake frequency calculation were based on J. Click on our picture gallery to find out!

This applies, for example, to companies in the oil, gas and chemical industries. Infos can be found under www. This article is protected by copyright. The amendments contained within it relate to the following three aspects.


With this deal, 199.3 wide range of PVA polymer grades will be made available in the pharma market. The vibration direction of the tube was parallel to the flow direction of the medium in the pipe. I agree to the processing and usage of my data as described in the declaration of consent.

The superior quality carbon dioxide will also be supplied to Coca-Cola systems. The revision provides some clearer and more-detailed definitions.

This standard remained unchanged for more than 20 years. As a result, passing through the in-line resonance is possible, if the process medium is gaseous and the range of the in-line resonance does not fall within the continuous operation of the plant. Receive 15 new engineering projects per week — get them easily delivered into your mailbox.

Here, the permissible flexural fatigue stress must not be exceeded during the cumulative number of vibrations of 10 11 cycles.