Benefits of using an RTJ flange and ring is that the gasket is restricted to a groove that has two sealing surfaces. The groove ensures the ring centers itself when the bolts are tightened. The sealing pressure increases when the process pressure increases on these type of flanges.

The outer surface of each RTJ gasket shall carry the manufacturer's name or identification trademark. The gasket number prefixed by the letters R, RX, or BX followed by the gasket material identification.