Ring joint gaskets are metallic sealing rings suitable for high pressure and high temperature applications and are fitted in ring groove type flanges.
They are widely used in the Oil/Gas and Petrochemical industry, in valves and pipe-work. Choice of material may be determined to suit higher temperatures and aggressive media. They comply with ASME B16.20 standards and API spec 6A (where applicable).
R type ring joint gaskets are available in oval or octagonal cross section and manufactured in accordance to API 6A and ASME B16.20 to suit API 6B and ASME/ANSI B16.5 flanges.
The oval ring fits the round and flat bottom ring groove flange, while the octagonal shape fits only the modern flat bottom groove flange.
The RX type RTJ gasket is manufactured in accordance to API 6A
and ASME B16.20 to suit API 6B and ASME/ANSI B16.5 flanges.
The RX is a pressure energized version of the R octagonal gasket
and fits the R type flat bottomed groove.
The RX has an increased height and utilises the internal system
pressure to energise and improve the seal as internal pressure
increases. Some RX sizes have a pressure relief hole to equalise
pressure both sides of the sealing faces.
The BX type RTJ gaskets are manufactured in accordance with
API 6A and are suitable for use in high pressure API 6BX flanges.
The gaskets form a metal to metal seal on assembly and the
efficiency improves as internal pressure increases.
All BX sizes have a pressure relief hole to equalise pressure
across sealing faces.
- SRX and SBX RTJ gaskets to API 17D for subsea applications.
- IX rings for compact flanges
- Other non-standard styles of metal rings are also available like combination, IX, Delta and Lens to customer specifications