Solid Drilled Stepped Flanged Thermowell

Product ID: FTW401

The FTW401 solid drilled stepped flanged thermowell is manufactured from solid bar-stock to ensure strength and integrity. This heavy duty construction is designed for use within applications involving high pressures and flow rates.

The FTW401 thermowell features a stepped stem profile for improved response times and has wide variety of flange sizes and ratings available including RF, FF and RTJ configurations.

This style of thermowell is available with a seal or full penetration welded flange, or for ultimate strength machined as a one-piece forging. The instrument connection can be specified with a BSPP, BSPT or NPT thread which allows for easy installation of an RTD or Thermocouple temperature sensor.

The stepped FTW401 flanged thermowell is available in a wide selection of materials including 316 stainless steel, Alloy C276 (Hastelloy®), Alloy 400 (Monel®) and Alloy 600 (Inconel®).

In order to determine or prove the suitability and required dimensions of a thermowell based on the process conditions, we offer wake frequency calculations as per ASME PTC 19.3 TW-2016. In addition there are a number of other certification and testing services available including 3.1 material certificates, dye penetrant testing, positive material identification (PMI) and radiographic inspection (X-Ray).

If the options provided by our industrial range don’t meet the precise requirements of your application, call our experts on +44 (0)1243 866 866 for a no-obligation consultation about a bespoke solution.

Solid Drilled Stepped Flanged Thermowell.
DesignSolid Drilled
Stem ProfileStepped
Flange Size1" • 1.5" • 2" • 2.5" • DN25 • DN40 • DN50 • DN80
Flange Rating150lb • 300lb • 600lb • 900lb • 1500lb • PN16 • PN25 • PN40
Flange TypeRaised Face (RF) • Flat Face (FF) • Ring Type Joint (RTJ)
ConstructionSeal Welded • Full Penetration Welded • One Piece Forged
Heat TreatmentNACE MR0175/ISO 15156
Material304 Stainless Steel • 310 Stainless Steel • 316 Stainless Steel • Alloy C276 • Alloy 400 • Alloy 600 • Alloy 601 • Alloy 625 • Alloy 800
Instrument Connection BSPP • BSPT • NPT

Need Help? Ask Our Experts

Our staff are fully trained to offer comprehensive, and specialist advice on our range of products. Whether you’re not sure what you’re looking for, or you need something highly specialised, give us a call and we’ll be happy to discuss your requirements.

Portrait of Andrew Homer.

Andrew Homer, Managing Director

+44 (0)1243 866 866

Connect on LinkedIn