WIKA

Thermowells / protection tubes

For each measuring point requirement the optimum thermowell / protection tube

Thermowells / protection tubes from WIKA are used with demanding operating conditions both in solid-machined versions from bar stock material and in fabricated versions with tubular design. The variants offered differ mainly in their designs; with flanges, threaded or for welding in. The connection of the thermowells / protection tubes by flange is universal and is used in many processes. The compact form of the threaded connection saves space and mounting is also very easy. If the process safety and robustness is important, the thermowells / protection tubes can be welded into the process directly. Furthermore, all connections for sanitary applications and also thermowells in solid-machined Vanstone design are available without weld seams. The selection of materials and the manufacturing of the thermowells / protection tubes in accordance with global standards or to customer specifications ensure optimal protection for the sensor.

FAQ
FAQ

What tests are usual or possible for thermowells and protection tubes?

Common non-destructive tests are the pressure test and, for protection tubes and thermowells with a welding seam, the liquid penetrant test.  In addition, to test the centrality of the bore, ultrasound or X-ray testing is possible.  To test the seali ...

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What is meant by double-certified materials, such as "SS 316/316L"?

Dual certified materials fulfil the requirements of the individual materials.  The material SS316 has, per ASTM A182, a maximum carbon content of  0.08 %;  the material SS316L (L=low carbon) has a maximum carbon content of 0.03 %. Steel alloy, with, ...

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Can the calculations per ASME PTC 19.3 TW-2016 be used for thermowells and protection tubes?

No. The calculation per ASME PTC 19.3 TW-2016 is only used for thermowells in tapered, straight or stepped designs from solid materials, such as Model TW10, TW15, TW20, etc.