How to Select a Threaded Pipe Flange for Flow Measurement

Start with the pipe connection

The product uses NPT or BSPT female threads. Select it when the piping design calls for one of these threaded connections. The product description also lists BSPP among the available thread types, so the purchase specification should identify the exact thread form rather than using “threaded” as the only requirement.

A practical check is to compare the flange thread callout with the mating pipe or fitting drawing before ordering. This is especially important for a replacement or retrofit, where the existing connection determines the required thread form.

Match pressure class and size

The flange is listed in ASME pressure classes 150, 300, 600, 900, 1500, and 2500. Its stated size range is 1/2 inch (DN15) through 24 inches (DN600). These options suit procurement packages that already define a nominal size and pressure class for the line.

For a new skid or piping spool, send the line size and required class with the RFQ. For a replacement, compare the flange dimensions and class with the existing assembly instead of selecting by thread size alone.

Check the measurement arrangement

The flange includes two 1/2-inch NPT pressure taps positioned radially opposite one another, with a listed alignment tolerance of ±0.5 degrees. The listed pressure-tap options are corner taps and flange taps. These details matter when the flange is being integrated with a differential-pressure measurement setup.

The product is intended for buyers who need an orifice flange arrangement for industrial flow measurement. Its stated flow-measurement accuracy is ±0.5% when paired with a DP transmitter and used with ISO 5167. That figure should be considered as part of the complete measurement arrangement, not as a standalone flange specification.

Choose the face and gasket details

Available face styles are RF, FF, and RTJ. Gasket options listed for the product include carbon steel, SS304, and SS316 spiral wound gaskets. The face style and gasket selection should follow the mating flange, sealing arrangement, fluid service, and project specification.

Picture a threaded orifice flange installed in a process line where the pipe connection is already defined and pressure is measured across the orifice. Before release, the engineering package should show the nominal size, pressure class, thread type, face style, tap arrangement, and gasket material. Those fields give the supplier enough information to match the flange to the assembly.

Who should choose this flange

Choose this threaded pipe flange when your project needs an orifice flange for industrial flow measurement and the connection design uses NPT, BSPT, or another listed thread form. It is also a fit for procurement teams comparing several ASME-class and face-style options within one orifice flange specification.

The product is less suitable for a purchase decision based only on the phrase “threaded flange.” The thread form, nominal size, pressure class, pressure-tap type, face style, and gasket material need to be fixed before the flange can be matched to the piping system.

Send those six details, along with the quantity and mating flange information, when requesting a quotation from Cangzhou Weihuan Pipeline Equipment Co.,Ltd.