Ring Joint Gaskets are machined from a variety of types forged solid metal such as Soft iron, ANSI304, ANSI316, F5, Low carbon, and special materials of alloy metals, Inconel Duplex, Monel, Hastelloy, Titanium, etc.
They are designed for high pressure and temperature applications by selecting the suitable shape and material. The hardness of the RTJ gasket body should always be 20-30HB less than the hardness of the flanges to prevent flange deformation.
Oval Style R type oval ring joint gasket
Ring joint gasket with oval cross-section is initially developed for high temperature and pressure applications. It is still used in the old type round bottom groove today.
Oct Style R type Octagonal ring joint gasket
Ring joint gasket with Octagonal cross-section is preferred by modern grooved flanges and has a higher sealing efficiency than oval types
RX Style RX Ring Joint Gasket
RX is used at pressures up to 15,000 psi (103 MPa). RX type Ring Joint Gasket is made to API 6A and interchangeable with standard Octagonal rings, it can take advantage of container fluid pressure well to effect a seal.
BX Style BX Ring Joint Gakset
All BX Ring Joint Gasket incorporate a pressure balance hole to ensure equalization of pressure which may be trapped in the grooves, it is only be used in API 6BX flanges. BX is used at pressures up to 15,000 psi.
| Material | Identification | Max Hardness(HB) |
| Soft Iron | D | 90 |
| Low Carbon Steel | S | 120 |
| 5Cr0.5Mo | F5 | 130 |
| SS304 | SS304 | 160 |
| SS316 | SS316 | 160 |
| SS316L | SS316L | 160 |
| SS321 | SS321 | 160 |
| SS347 | SS347 | 160 |
| Hastelloy | Hastelloy | 200 |
| Alloy 625 | INC 625 | 195 |
| Alloy 825 | INC825 | 195 |
The Ring Joint Gasket was initially developed for high pressure and temperature applications found in the petroleum industry and is primarily used in the oil field on drilling and completion equipment.
Furthermore, the Ring Type Joint product range can also be found on flange and pipework assemblies, along with some high integrity pressure vessel joints.
