iTherm Moduline TT131

Summary

Product Identification

• Product Name: iTHERM TT131
• Type: Welded thermowell for a range of industrial applications.
• Document Revision: TI01442T/09/EN/02.21, dated 2021-03-30

Application

The iTHERM TT131 is a thermowell designed for industrial applications, particularly in the chemical, oil & gas, and power & energy sectors. It protects temperature sensors from physical and chemical stress, offering a robust design for challenging process conditions.

• Purpose: Protects temperature sensors from physical and chemical stress.
• Design: Highly robust for challenging process conditions.
• Application Locations: Pipes, vessels, or tanks.
• Maintenance Benefit: Allows for sensor replacement without process interruption.

Operating Limits

• Pressure Range: Up to 100 bar (1,450 psi).
• Process Temperature Range: -200 to +1,100 °C (–328 to +2,012 °F), depending on thermowell type and material.
• Maximum Flow Velocity: Varies significantly with immersion length, thermometer diameter, process medium, temperature, and pressure. Example values are provided for water and superheated steam at 50 bar (725.2 psi).

Mechanical Construction

• Design: Modular configuration according to DIN 43772.
• Thermowell Diameter Options: 9 mm x 1.25 mm, 11 mm x 2 mm, 12 mm x 2.5 mm, 14 mm x 2 mm, 16 mm x 3.5 mm, ¼" SCH80 (13.7 mm x 3 mm), ½" SCH80 (21.3 mm x 3.7 mm), ½" SCH40 (21.3 mm x 2.7 mm).
• Tip Shapes: Straight, tapered, or reduced (stepped).
• Optional Sheathing: PTFE (for straight tips), Tantalum (for straight or tapered versions).
• Materials:
  • Standard: AISI 316, 316L, 316Ti, 321, 446.
  • High-Performance Alloys: Alloy 600, Alloy C276.
  • Specialty: Tantalum, PTFE.
• Weight: Typically 0.2 to 7.5 kg (0.44 to 16.53 lbs) for standard options.
• Surface Roughness: For wetted surfaces, Ra ≤ 0.76 µm (0.03 µin).

Process Connections

A wide range of process connections are available, including:

• Threads: M18x1.5, M20x1.5, M27x2, M33x2, NPT ½", NPT ¾", NPT 1", G 3/8", G ½", G ¾", G 1", R ¾", R ½".
  • Maximum static process pressure for threaded connections is up to 140 bar (2,031 psi) at +40 °C (+140 °F).
• Weld-in Adapters: Cylindrical type TK40.
  • Maximum pressure for ELASTOSIL ferrule: 10 bar (145 psi) at +200 °C (+392 °F).
  • Maximum pressure for 316L weld-in adapters: up to 40 bar (580 PSI) at 100 °C (212 °F), or 25 bar (77 psi) at 400 °C (752 °F).
• Compression Fittings: Type TK40 with NPT ½" or G ½" connections.
  • Maximum pressure for 316L: 40 bar (104 psi) at +200 °C (+392 °F), or 25 bar (77 psi) at +400 °C (+752 °F).
• Flanges:
  • Standards: DIN, EN (DIN EN 1092-1), ASME (ASME B16.5), JIS (JIS B2220).
  • Materials: Typically AISI 316L (1.4404 or 1.4435). Alloy 600 and Alloy C276 are available with a raised face of the alloy welded onto a 316L flange.
  • Pressure ratings are specified by PN (for EN) and Class (for ASME). See the official PDF for exact tabulated values.

Certificates and Approvals

• CRN Approval: Available for specific versions, identified during configuration.
• Other Standards: Complies with DIN 43772.
• Service Options: Available free from oil and grease for O₂ applications, and PWIS-free (paint-wetting impairment substances) as optional.
• Material Certification: Material certificate 3.1 (EN 10204) can be requested.
• Testing: Pressure tests according to DIN 43772, liquid penetration test, helium leak test, hydrostatic pressure test, PMI test, bore concentricity test, and radiographic tests are available.

---

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