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RTJ steelqualities with UNS no, identification and max hardness.
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Type R octagonal
Oval and octagonal configurations are interchangeable on flat-bottomed groove flanges that have a 23° angle groove wall.
Type R oval
An oval ring joint flange that was designed for a flange that is now out of production. This flange had a rounded bottom ring groove. Oval and octagonal configurations are interchangeable on flat-bottomed groove flanges that have a 23° angle groove wall.
Type RX
RX is a gasket designed for pressures up to approx. 700 bar. This is a self-sealing gasket that uses a pressure-energised effect, which improves the efficiency of the seal as the pressure rises. The RX series is interchangeable with the R series.
Type BX
BX is a gasket designed for very high pressures up to approx. 1,500 bar. These rings may only be used in connection with API type BX flanges and grooves. The BX ring has a through horizontal hole
that acts as a pressure equaliser
Ring Joint
A ring joint gasket is a metal gasket used in conditions involving very high temperatures and/or pressures.
The RTJ gasket is manufactured according to ASME B 16.20 standards and API spec 6A. Carefully controlling the hardness ensures an effective seal without damaging the flange.
Ring joint gaskets are always used in combination with a special flange that ensures a good seal when the correct material and profile has been chosen.
