This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types.

Type B is the Raised Face sealing face, the most widely used type in EN1092-1 flanges. It features a raised circular sealing area that concentrates gasket compression and improves sealing efficiency.

EN 1092-1 Type 11 weld neck flanges may be furnished with a series of facings from Type A to Type H, of which raised face (RF, Type B) is most commonly applied.

In this blog, we’ll break down the most common flange face types — Raised Face (RF), Flat Face (FF) and Ring Type Joint (RTJ) — helping you choose the right one for your next project with complete confidence.

When a European or Asian drawing calls out a “Type 11” or “Type 01” flange, it’s using EN 1092-1’s numeric type numbers – and “Type 11” is the weld-neck flange, not “Type 1.”

Male and Female flanges feature a raised portion (male) on one flange face and a corresponding recessed area (female) on the mating flange. The male face fits into the female face, providing a tighter, more secure connection.

The Stainless Steel weld-neck flange Type 11/B with RF design provides secure connections for high-pressure systems. Rated PN25, it ensures durable performance and is available in both 2COL and 4COL configurations for diverse applications.

The critical engineering difference between raised face vs flat face flanges is the facing geometry (contact area), which strictly dictates gasket selection, bolt-load calculations, and mating compatibility.

The raised face (RF) is the default flange face per ASME B16.5 for all pressure classes from 150 through 2500. A machined raised ring surrounds the bore, elevating the gasket seating area above the bolt circle.

The 2100 Series flanged forged steel flange, welding BW, PN10/16, type 11/B1 from DN 15 to DN 300 from the performance range, forged steel, raised face flange for fluid or gas transport.