• Industrial

RTJ GASKETS

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Ring Type Joint Gasket (RTJ Gasket)

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 bevelled edge sections for wellhead pressures above 700 bar.

RTJ GASKETS TYPES

R Type Ring Joint Gasket (Oval and Octagonal)

“Style R” is the most common RTJ gasket type. R type ring joint gaskets are available in oval or octagonal cross-section and 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 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.

Style RX-RTJ Gasket

The RX type RTJ gaskets are 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.

Style BX -RTJ Gasket

The BX type RTJ gaskets are 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.

RTJ GASKET MATERIALS

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.