Thermometrics machines thermowells in straight, stepped, and tapered bore profiles for all standard and custom process piping configurations. ASME PTC 19.3 wake frequency calculations available to ensure vibration-safe installation.
| Parameter | Options / Range |
|---|---|
| Profile / Bore Style | Straight bore · Stepped bore · Tapered (vanishing taper) |
| Process Connection | Threaded (NPT/BSP) · Flanged (ANSI 150–2500#) · Socket-weld · Weld-in (Van Stone) · Compression fitting |
| Insertion Length (U) | 2" to 36" standard · Custom to 72" |
| Lagging Extension | 0" to 12" (for insulated piping) |
| Bore Diameter | 0.260" (standard) · 0.385" · 0.500" · Custom |
| Materials | 316 SS · 304 SS · Carbon Steel A105 · Hastelloy C276 · Alloy 400 (Monel) · Duplex 2205 · Titanium |
| Pressure Rating | To ANSI 2500# (flange) · To 20,000 PSI (threaded, wall thickness dependent) |
| Temperature Range | −325°F to 1500°F (material-dependent) |
| Surface Finish | 125 µin Ra standard · 32 µin Ra electropolished · Custom |
| Flange Facing | Raised face (RF) · Ring-type joint (RTJ) · Flat face (FF) |
Thermowells in high-velocity process streams are subject to vortex-induced vibration (Kármán vortex shedding). Thermometrics provides ASME PTC 19.3-TW wake frequency calculations to verify that the natural frequency of the thermowell exceeds the Strouhal vortex frequency by the required safety margin, ensuring the installation is vibration-safe.
Most common style for general process applications. Available in ½" NPT, ¾" NPT, 1" NPT, and BSP equivalents. Hot-end and cold-end threads can be different to accommodate non-standard piping connections.
Companion flange welded to the process connection. ANSI 150# through 2500# pressure class. Available in all standard flange materials. Blind, weld-neck, and slip-on flange configurations.
Cold-end machined to slip over process nozzle OD for socket welding. Eliminates threaded connection in high-cycle fatigue applications. Common in power generation and chemical plant service.
Thermowell body welded directly into the process nozzle. Maximum strength and pressure integrity. Used where vibration or shock loading would challenge threaded or flanged connections.
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