The difference between RF flange and RTJ flange

1. Different sealing surfaces

The RF flange sealing surface is convex. The RTJ flange sealing surface is a ring connection surface.

2. Different uses

RF: It’s often used in conjunction with butt welding and plug-in welding. It’s mostly used in cases where the media conditions are relatively mild, such as low-pressure non-purifying compressed air and low- pressure circulating water.

RTJ: It’s often used in conjunction with the flat welding type. HVAC electricity, building water supply, pressure vessel accessories, pressure pipe accessories.

3. Different class levels

RF: It’s commonly used in PN10.0, PN16.0, PN25.0, PN32.0, PN42.0 class levels.

RTJ: It’s commonly used in PN1.6, PN2.5Mpa pressure scales