What 150RJ and 150RF represent American Standard flange
The RJ indicates the ring joint seal, and the RF is the face seal
150 is the pound indicating the pressure PN2.0 RJ means the sealing surface is the ring connection and the RF is the projecting surface
The flange pressure 150LB RJ is representative of the ring connection, and the flange pressure 150LB RF is the convex flange
