Omnigrad TA575, TA576

Summary

Product Identification

• Product Name: Omnigrad TA575, TA576
• Product Type: Industrial thermowell for temperature measurement technology
• Document Number: TI01128T/09/EN/02.24-00
• Document Date: 2024-01-15

Application

The TA575 and TA576 are heavy-duty, general-purpose thermowells manufactured from round barstock with a welded connection flange. They are designed for use with resistance and thermocouple thermometers in demanding applications. Various non-destructive tests are conducted to ensure quality.

Features & Benefits

• Manufactured from round barstock.
• Process connection is a flange, either welded on both sides or with a full penetration weld.
• Available in straight, conical, or conically tapered tip shapes.
• Extension, immersion length, and dimensions can be selected based on process requirements.
• Wide range of standard materials and flange connections available.
• Customized versions can be manufactured to specifications.

Installation

• Mounting Location: Can be installed in pipelines, tanks, or vessels.
• Orientation: No restrictions.
• Installation Instructions:
  • For small cross-section pipes, the sensor tip should reach or slightly extend past the pipe axis.
  • Recommended minimum immersion length is 80 to 100 mm (3.15 to 3.94 in).
  • Immersion length should be at least eight times the thermowell diameter.
  • Immersion length influences measurement accuracy; insufficient length can lead to errors from heat conduction.

Process Limits

• Process Temperature Range: Refer to the 'Material' section for maximum operating temperatures.
• Pressure Range:
  • Flange (EN1092-1): Depending on the flange pressure rating (PNxx), 16 bar or 40 bar.
  • Flange (ASME B16.5): Depending on the flange pressure rating, 150 psi, 300 psi, or 600 psi.
• Permitted Flow Velocity: Decreases with increasing immersion length and depends on thermowell shape/size, medium, process temperature, and pressure. A thermowell sizing tool is available via Endress+Hauser Applicator software.

Mechanical Construction

• Design & Dimensions: All dimensions are in mm (in).
  • Shapes: Continuous straight with flat bottom, conical with flat bottom, conical and tapered with flat bottom.
  • Dimensions: Includes bottom thickness (D), bore diameter (F1), outer diameter (Q1), root tip diameter (Q2), taper length (R), connection to thermometer (S), extension (T), and immersion length (U).
  • Thermometer Connection Thread: Standard is ½" NPT, ½" NPSM, or ½" NPSC.
  • Screw-in Length: 8 mm (0.31 in).
  • Thread Length: 22 mm (0.87 in).
• Thermowell Specifications:
  • TA575:
    • Thread: ½" NPT, ½" NPSM (ASME B 1.20.1)
    • Extension Outer Diameter: 30 to 34 mm (1.18 to 1.34 in)
    • Immersion Length Outer Diameter: ≤ extension outer diameter
    • Standard Extension: 75 mm (2.95 in)
    • Standard Bore Diameter: 7 mm (0.28 in)
    • Surface Roughness: < 0.8 µm (31.5 µin)
  • TA576:
    • Thread: ½" NPT, ½" NPSC
    • Extension Outer Diameter: 25 to 29 mm (0.98 to 1.14 in)
    • Immersion Length Outer Diameter: ≤ extension outer diameter
    • Standard Extension: 56 mm (2.20 in), 58 mm (2.28 in)
    • Standard Bore Diameter: 6.5 mm (0.25 in), 7 mm (0.28 in), 9.5 mm (0.37 in), 10 mm (0.4 in)
    • Surface Roughness: < 1.6 µm (63.0 µin)

Process Connections (Flanges)

• Material: Flanges are supplied in stainless steel AISI 316L (1.4404 or 1.4435).
• Standards: Available in DIN, EN (DIN EN 1092-1), ASME (ASME B16.5), JIS (B2220), and HG/T standards.
• Sealing Surface Geometry: Various forms are available including without raised face, with raised face, tongue, groove, projection, recess, and ring-type joint. Specific surface roughness values (Rz or Ra) are provided for each form and standard.
• Raised Face Height: Varies by standard (DIN EN 1092-1, ASME B16.5, JIS B2220) and size (DN or Class).
• Dimensional Tables: Detailed dimensions (D, b, K, d, L) and approximate weights are provided for EN, ASME, and HG/T flanges across various pressure ratings (PN16, PN25, PN40, PN63, PN100, Class 150, 300, 600, 900, 1500).

Thermowell Tip

• Shape: Straight, conical, or conically tapered.
• Bottom Thickness: 5 mm (0.2 in) or 6 mm (0.25 in).

Material

• Thermowell & Process Connection:
  • AISI 316/1.4401: Max. 650 °C (1202 °F). General corrosion resistance, good in chlorine-based and acidic non-oxidizing atmospheres due to molybdenum.
  • AISI 316L/1.4404/1.4435: Max. 650 °C (1202 °F). Similar to 316 but with increased resistance to intergranular corrosion and pitting. 1.4435 offers higher corrosion resistance and lower delta ferrite content.
  • AISI 316Ti/1.4571: Max. 700 °C (1292 °F). Properties comparable to 316L with enhanced intergranular corrosion resistance due to titanium. Suitable for chemical, petrochemical, and oil industries. Limited polishability.
  • AISI A105/1.0460 (C22.8): Max. 450 °C (842 °F). Heat-resistant steel, suitable for low-oxygen, nitrogen-containing atmospheres; not for acids. Common in boilers, water/steam pipes, and pressure vessels.
• Nickel-based Materials (Alloy600, Alloy C276) with Flange: For cost reasons, only the raised face of the thermowell is made of the alloy, welded onto a 316L flange.

Certificates and Approvals

Current certificates and approvals can be found on the Endress+Hauser website by selecting the product, navigating to Downloads, and checking the relevant product page.

Ordering Information

Detailed ordering information is available from the nearest sales organization or via the Endress+Hauser Product Configurator on their website.

Accessories

• Applicator Software: For selecting and sizing measuring devices, including calculations for pressure loss, accuracy, and process connections. Available at https://portal.endress.com/webapp/applicator.
• Product Configurator: Tool for individual product configuration with up-to-date data, exclusion criteria verification, and order code generation. Available on the Endress+Hauser website.

Documentation

Various documents are available depending on the device version, including:

• Technical Information (TI): Planning aid with technical data, accessories, and related products.
• Brief Operating Instructions (KA): Quick guide for initial commissioning.
• Operating Instructions (BA): Comprehensive guide for all life cycle phases.
• Description of Device Parameters (GP): Detailed explanation of parameters.
• Safety Instructions (XA): For electrical equipment in hazardous areas, if applicable.

Information on documentation can be found via the Device Viewer or Endress+Hauser Operations app using the serial number.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror