Standard Style R Ring Type Joints are manufactured inaccordance with ASME B16.20 or API 6A.Available in both oval and octagonal configurations, both types are interchangeable on the modern octagonal type grooved flanges.
As with all solid metal Ring Type Joints including Style R, it is recommended to replace the ring when flanged connection is broken.
Surface finish of the Style R Ring Type Joint sealing faces (radiused ends of an Oval and the 23° angled faces of an Octagonal shape) shall not be greater than 1.6 μm Ra /63 μin RMS. Flexitallic Style R Ring Type Joints can bemanufactured in accordance with all relevant standardsto suit the following flange designations:
ASME B16.47 SERIES A