ScrutonWell® - Innovative design for the damping of vibrational excitation
Applications
- Petrochemical industry, on/offshore, plant construction
- For highest process loads
- Application in critical measuring points
Special features
- The damping of vibrational excitation by helical strakes is a recognised state of the art in a wide variety of industrial applications
- Easier and more cost-effective installation of the thermowell without any machining of the collar or nozzle compared to the conventional support of the thermowell with support collar
- Optimised root design for improved bending strength
Description
In order to avoid any damage to the thermowell during operation due to mechanical loads, a wake frequency calculation per ASME PTC 19.3 TW-2016 is recommended for critical process conditions. In case of a calculation with negative results, the only constructive solution so far was to shorten the thermowell stem or to increase the root and tip diameter, accepting a longer response time of the thermometer. The only other alternative up to now was to use a support collar to stabilise the thermowell stem inside the flange nozzle. This variant required an on-site machining of the collar to assure an interference fit in flange nozzles.
The ScrutonWell® design reduces the amplitude of oscillation by more than 90 % 1) and allows an easy and fast installation of the thermowell without support collar, and thus without expensive and time-consuming rework on site.
The WIKA ScrutonWell® design has been tested and approved by the independent laboratories TÜV NEL (Glasgow) and the Institute for Mechanics and Fluid Dynamics (Technical University of Freiberg).
The ScrutonWell® design can be used for all kind of solid-machined thermowells with flange connection, in Vanstone design or for weld-in or threaded process connection.
This helical design has been used successfully for decades in a wide variety of industrial applications to effectively suppress vortex-induced vibration excitation.
1) Journal of Offshore and Mechanics and Artic Engineering Nov 2011, Vol 133/041102-1 by ASME
Discover also our wide product portfolio of WIKA thermowells and protection tubes.
What is the WIKA Build ID?
The WIKA Build ID is a unique seven-digit code that temporarily saves an individual WIKA instrument configuration. The WIKA configuration can be saved, shared and used later using the Build ID.
Can I replace U and L thermocouples per DIN 43710 with Type T and J thermocouples per DIN IEC 60584?
No. Type T and J themocouples have a different thermal voltage characteristic, which would lead to a measuring error. Type U and Type L thermocouples should only be delivered as replacement parts in old installations. With the construction of new p ...
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