R-type ring joint gaskets are metallic sealing rings available in oval and octagonal cross-section designs. KASIN lists both R-37 oval ring joint gaskets and R-37 octagonal RTJ gaskets, illustrating the importance of selecting the specified profile rather than buying by nominal flange size alone.
The R-ring profile and corresponding flange groove must be compatible with the equipment specification. Oval and octagonal designs have distinct cross-sections and sealing contact behavior. Their suitability depends on the flange design and applicable standard, so do not interchange them solely because the ring designation appears similar.
Ring material hardness relative to the flange should be considered as part of the applicable installation specification. Selecting a harder metal without reviewing the flange design can be inappropriate. In maintenance projects, document whether the removed ring was oval or octagonal and inspect the groove before preparing the replacement list.
Confirm the precise R number, cross-section, metal grade, flange dimensions, surface condition and service duty. For other ring geometries, consult ring joint gaskets. KASIN also provides service and ordering information details for purchasers coordinating quantities, samples and packaging.
