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Orifice flanges are used instead of standard pipe flanges when an orifice plate or flow nozzle has to be installed. Pairs of pressure tappings are machined into the orifice flange, making separate orifice carriers or tappings in the pipe wall unnecessary. The range of orifice flanges covers all standard sizes and ranges, and all common flange materials. Flanges are available in socket weld or weld neck form, and are typically supplied with two ½” NPT tappings in each flange. Jacking screws to ensure ease of removal of the primary flow element are provided.

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. Specialty Flange and Fitting, Inc. offers these flanges in stainless steel material. SFF 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.

Key Features:

Available with raised face or RTJ face
Used for flow/rate metering of piping systems
SFF can supply the plate, pressure connection holes, and jack screws with the orifice flange unit

A105, A105N,
A350 LF2
Customer Request
Product Dimensions

1'' - 24'' NPSsize flanges in 300#-2500# pressure classes.

Please contact us to request orifice flanges in different materials or dimensions; we can create a custom orifice flange for your project.hers/0-(2).jpg" _fcksavedurl="/d/pic/mary-others/0-(2).jpg">