Straight-Style Threaded Thermowell, ASTM B564 UNS N08825

Product Type: Straight-Style Thermowell (Threaded, Non-Flanged)

Material: ASTM B564 UNS N08825 (Alloy 825), solid bar stock, machined bright finish

Stem Profile: Straight bar-stock, uniform diameter along the full insertion length (no taper/step)

Process Connection: 3/4 Inch NPT male threaded connection with hex wrench flats for installation/removal

Design Type: Screwed thermowell - suitable for lower-pressure piping/vessel connections where a flanged connection is not required

Surface Finish: Polished bright metal finish on both stem and hex fitting

Core Advantages

Superior Corrosion Resistance: Alloy 825 provides excellent resistance to chloride-ion stress-corrosion cracking, pitting, and crevice corrosion, along with strong performance in both oxidizing and reducing acid environments - well suited to sour and chemically aggressive service.

Simple, Cost-Effective Installation: 3/4" NPT threaded connection allows quick installation directly into a pipe tee or threadolet without requiring a mating flange - reducing installation cost and footprint.

Solid Bar-Stock Construction: Machined from a single solid billet for strength and reliability under process flow and pressure, without weld seams.

Compact Straight-Stem Design: Uniform bore diameter along the stem provides consistent thermal response and is easier to manufacture/replace than tapered designs.

Applications

Suited for corrosive and sour-service process piping, utility lines, and lower-pressure systems in oil & gas, petrochemical, and chemical processing where a threaded (screwed) connection is preferred over a flanged thermowell and where Alloy 825's corrosion resistance is required - typically used with a thermocouple or RTD temperature sensor insert.