American Thermowell orifice flange unions come with threaded tap or socket-weld connections, engineered to handle high pressure and temperature applications.

Our flange unions are engineered to securely hold orifice plates, ensuring accurate and reliable flow measurement. They come in various materials, including A105 carbon steel and 316L stainless steel. Known as orifice unions, orifice flange sets, or orifice pairs, American Thermowell flange unions include all necessary hardware for hassle-free installation, such as nuts, studs, gaskets, and pipe plugs. All our flange unions meet or exceed ASME specifications.

  • Available in various line sizes between 2” – 24”
  • Greatly reduce maintenance time and cost with basic fitting design with minimal parts
  • Flanges include pressure taps for convenient service in the field
  • American Thermowell orifice flange unions are supplied complete with nuts, bolts, gaskets and plugs, for easy installation
  • Designed for most liquid, gas and steam applications
  • Paddle orifice plate sold separately

American Thermowell flange unions are available in both single units as well as ready to install meter runs.

American Thermowell Orifice Plate Catalogue

American Thermowell Orifice Plates and More Catalogue

Available in a variety of styles, sizes and materials, see our catalogue for more details.

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