Flanged Thermowells

S.M.Gauge supply a wide range of flanged thermowells that are available with either seal welded, full penetration welded or one piece forged. A wide range of flange sizes and ratings are available in either raised face (RF), flat face (FF) or ring type joint (RTJ). Some other options include velocity collars and cover flanges.

Thermowell stem profiles available include parallel, tapered and stepped. Wake Frequency Calculation can be requested in order to determine or prove the required dimensions and suitability of a thermowell based on the process conditions.


  • Design: Solid drilled bar stock
  • Stem Profile: Parallel • Tapered
  • Flange Sizes: 1", 1.5", 2", 2.5", DN25, DN40, DN50, DN80
  • Flange Ratings: 150lb, 300lb, 600lb, 900lb, 1500lb, PN16, PN25, PN40
  • Flange Type: Raised face (RF), Flat face (FF), Ring type joint (RTJ)
  • Construction: One piece forged
  • Heat Treatment: NACE MR0175/ISO 15156
  • Material: 304 stainless steel
  • Instrument connection: BSPP, BSPT, NPT


  • Tapered stem profile
  • Flange sizes
  • Flange ratings
  • Flange Type: Flat face (FF), Ring type joint (RTJ)
  • Construction: Seal welded, full penetration welded
  • Heat Treatment to NACE MR0175/ISO 15156
  • Material Certificate
  • Material: 310 stainless steel, 316 stainless steel, Alloy C276, Alloy 400, Alloy 600, Alloy 601, Alloy 625, Alloy 800
  • Instrument connection: BSPT, NPT

If you have any questions, please contact us on +44 (0) 117 965 4615 or visit our enquiry page and submit the form.

We can also customise our products to your specific needs.

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