Flanged thermocouple and RTD assemblies replace a standard threaded NPT process connection with a bolted flange, enabling installation in high-pressure, high-temperature, or large-bore nozzles where threaded connections are not rated or practical. Thermometrics fabricates flanged sensor assemblies to ANSI B16.5, DIN 2632–2638, and custom flange specifications.
| Parameter | Options Available |
|---|---|
| Flange Standard | ANSI B16.5 · DIN 2632–2638 · ASME B16.47 (large bore) · API 6A |
| Pressure Class | ANSI 150# · 300# · 600# · 900# · 1500# · 2500# |
| Flange Size | 1/2" to 4" NPS standard; larger on request |
| Flange Face | Raised Face (RF) · Ring Type Joint (RTJ) · Flat Face (FF) |
| Flange Material | A105 carbon steel · 316SS (A182 F316) · Alloy 625 · Duplex 2205 |
| Sensor Type | Thermocouple (any type) · Pt100 RTD (any class) · Duplex |
| Probe Style | Direct insertion MIMS · With separable thermowell · Protection tube |
| Insertion Length | 2" to 60" — calculated to achieve correct immersion ratio per process nozzle |
| Connection Head | Standard Form B · NEMA 7/9 explosion-proof · Remote mount · DIN transmitter |
| Documentation | Material test report · Dimensional inspection · C of C · NIST calibration |
| Condition | Flanged | Threaded (NPT) |
|---|---|---|
| Pressure class | All — especially >600# (1480 PSI) | Up to ANSI 600# with proper rating |
| Nozzle bore size | 1/2" to 4"+ NPS | 1/4" to 2" NPT |
| Pipe wall thickness | All — flange bolts to nozzle | Requires adequate thread engagement |
| Hazardous fluid | Preferred — no thread seal to leak | Acceptable with rated thread compounds |
| Frequent removal | Yes — bolted connections tolerate cycles | NPT threads gall on repeated make/break |
| Hot-tap installation | Required for hot-tap nozzle flanges | Not standard for hot-tap |
In high-velocity or abrasive process streams, direct-insertion flanged sensors can suffer erosion or vibration fatigue. Thermometrics can supply the flanged assembly with an integral thermowell — the flange connects to the nozzle, the thermowell provides the pressure boundary and mechanical protection, and the sensor element is a separable spring-loaded probe inside the thermowell bore. This allows element replacement without breaking the pressure seal. See the Thermowells page for wake frequency and sizing criteria.
Talk directly to the engineering team that builds your assemblies. No bots, no call centers.