Datasheet summary
TU51, TU52, TU53, TU54
Engineering summary from PDF text extraction for TU51, TU52, TU53, TU54. Verify every value with the OEM datasheet.
Summary
Product Identification
The TU51, TU52, TU53, and TU54 are heavy-duty, general-purpose thermowells manufactured from drilled barstock material.
Application
These thermowells are designed for use with RTD and thermocouple assemblies, primarily in heavy-duty applications within process industries.
Key Features and Benefits
- Manufactured from round barstock, meeting industry standards.
- Available process connections include weld-in, socket weld, threaded, or flanged with double-sided standard or full penetration welds.
- Thermowell stem shapes can be straight, stepped, or tapered.
- Variable lag and immersion lengths are offered.
- CRN approved thermowells are available.
- Standard material of construction is 316/316L.
- Special versions can be manufactured according to specifications.
Mechanical Construction
Design and Dimensions
All dimensions are provided in inches.
- Thermowell Shapes: Tapered, Straight, Stepped.
- Bore Diameter: 0.26"
- Tip Thickness: 0.25"
- Roughness: 32µin (0.8µm)
General Dimensions
| Type | Process Connections | Immersion Length | Lag Length | Instrument Connection |
|---|---|---|---|---|
| TU51 (Weld-in) | ¾" and 1" | 2" to 24" | Up to 6" (½" increments) | ½" NPT |
| TU52 (Socket-weld) | ¾" and 1" | 2" to 24" | Up to 6" (½" increments) | ½" NPT |
| TU53 (Threaded) | ½", ¾" and 1" | 2" to 24" | Up to 6" (½" increments) | ½" NPT |
| TU54 (Flanged) | 1", 1-½", 2" ANSI Flange 150 to 1500 RF | 2" to 24" | Up to 6" (½" increments) | ½" NPT |
Specification Tolerances
- Well tip thickness: ¼" ± 1/16”
- Root/Tip Diameter: ± 0.01”
- Insertion Length (A Dim.): ± 1/16”
- Bore Diameter: + 0.005” / - 0.003”
- Barstock Thermowell OD: Milling Standard: + 0.000” / - 0.031”
Flanged Wells
Manufactured in accordance with ASME/ANSI B16.5.
Pipe Threads
Manufactured in accordance with ANSI B1.20.1.
Materials
Material Specifications
| Material Name | Short Form | Recommended max. temperature for continuous use in air | Properties |
|---|---|---|---|
| AISI 316L | 1.4401 or X5CrNiMo17-12-2 | 650 °C (1202 °F) | Austenitic, stainless steel. High corrosion resistance in general. Particularly high corrosion resistance in chlorine-based and acidic, non-oxidizing atmospheres through the addition of molybdenum (e.g. phosphoric and sulfuric acids, acetic and tartaric acids with a low concentration). |
| 1.4404 / X2CrNiMo17-13-2 | AISI | 450 °C (842 °F) | Heat-resistant steel. Resistant in nitrogen-containing atmospheres and atmospheres that are low in oxygen; not suitable for acids or other aggressive media. Often used in steam generators, water and steam pipes, pressured vessels. |
| A105/1.0460 / C22.8 |
The temperatures for continuous operation are reference values for use in air without significant compressive load. Maximum operating temperatures are reduced under abnormal conditions such as high mechanical load or in aggressive media.
Installation
- Installation possibilities include pipes, tanks, or other plant components.
- A general rule of thumb is to design the insertion length to be 10 times the diameter of the thermowell.
- For accurate measurements, the sensor tip should reach or extend slightly past the centerline of the pipe, especially in laminar flow. Angled (tilted) installation is also a solution. Consider process conditions like flow velocity, viscosity, and process pressure when determining immersion length.
Certificates and Approvals
Current certificates and approvals can be selected via the Product Configurator at www.endress.com.
Ordering Information
Detailed ordering information is available from your nearest sales organization or in the Product Configurator at www.endress.com.
Disclaimer: This extracted summary may not capture all figures, footnotes, or revisions present in the original document. Contractual data must always be verified against the specific revision of the OEM PDF used for the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.