Intro: 

These orifice flanges are available in all of our stainless steel and chrome-moly grades, from ½” to 24” and beyond, class 300 to 2500.. We can also source many of your other grade requirements.

These orifice flanges are similar in almost every aspect to their respective flanges, except that they have holes in the side of the flange perpendicular to the bolt holes. These holes act as instrumentation outlets for such things as pressure gauges, flow speedometers, and the like. These holes can be threaded or socket, in a variety of sizes. Another smaller hole is made among the bolt hole pattern to accommodate a jack screw to assist in separating the flanges after installation. Orifice flanges come in weldneck flange, slip-on flanges, and threaded types.

Orifice Flanges are used with orifice meters for the purpose of measuring the flow rate of either liquids or gases in the respective pipeline. Orifice flanges generally come with either raised faces or RTJ (Ring Type Joint) facings. They are, for all intensive purposes, the same as weld neck and slip-on flanges with extra machining. They have modifications of radial tapped holes in the flange ring for meter connections and orifice plate carriers for the reason of fitting meter connections. The additional bolts act as a jack to allow the separation of the two flanges to change the orifice plate or for other inspection services. We offers these flanges in stainless steel material. For carbon steel, visit our sister company at www.forgeflange.com. We not only stock certain sizes of this flange, but has been a reputable source for them for over thirty years. We usually supply the plate, pressure connection holes, and jack screws with the orifice flange unit (which is usually two flanges mated together and ready for use) Please contact our sales department with additional questions on orifice flanges.