Ring Joint Gaskets are suitable for high pressure and high temperature applications. The RTJ Gaskets are available in R, RX, BX styles and in oval/octagonal profiles.
R type (oval and octagonal) solid sections to fit standard ring joint flanges with trapezoidal grooves.
Types RX and BX with complex beveled edge sections for wellhead pressures above 700 bar.
Soft iron, low carbon steel, alloy steels F5 and 410; stainless steels 304, 304L, 316, 316L, 321 and 347.
UKL ring joint gasket (RTJ) provides a strong and durable metal-to-metal seal between two mating RTJ flanges. As the flanges are bolted, the softer material of the ring joint gasket is “squeezed” into the flanges grooves (made of a harder material) and seals the connection very tightly.
UKL Ring joint gaskets (RTJ) ensure a long lasting and strong seal for flanges, valves, piping spools and vessels at high pressure and temperatures (which are typical conditions for many petrochemical processes).
UKL-RTJ gaskets are available in different designs (called “styles”) and dimensions, as illustrated in the picture below (BX, R, and BX).
“Style R” is the most common RTJ gasket type. R type ring joint gaskets are available in oval or octagonal cross-section and manufactured according to API 6A and ASME B16.20 to suit API 6B and ASME/ANSI B16.5 flanges.
This type of RTJ gasket is machined to tight manufacturing tolerances to ensure correct installation with standard ASME B16.5 and API 6B ring joint faced flanges. “R style” oval and octagonal RTJ gaskets can seal pressures up to 6250 psi by ASME B16.20 and up to 5000 psi according to the API 6A pressure ratings.
Type R- RTJ gaskets are frequently used for valves covers.
The RX type RTJ gasket is manufactured according 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 utilizes the internal system pressure to energize and improve the seal as internal pressure increases.
Some RX sizes have a pressure relief hole to equalize pressure on both sides of the sealing faces.
The BX type RTJ gaskets are manufactured according to 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 equalize pressure across sealing faces.
The material of RTJ gaskets shall match the flanges material but must have a lower hardness: this to ensure that the gasket, and not the flange, gets plastically deformed within the groove of the flange as the two mating flanges are bolted together.
In case a harder material for the ring type joint is used, the groove of the flange would be damaged as the flanges are tightened.