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Ring Joint Gasket POINT

• POINT 01

  Major shapes of the ring joint gasket are ‘oval’ and ‘octagonal.’ The RX and BX types are ideal for high pressure conditions over 700 kgf/cm2.

• POINT 02

  The flange groove deformation is more significant in the case of oval gaskets than octagonal gaskets. This is because the bolt extendibility creases and the gasket is also deformed as the flange connecting pressure increases, causing the change from the linear contact to the surface contact. Thus, the initial sealing performance is excellent but the gasket deformation is significant on the other hand. As the octagonal gasket involves internal pressure, the pressure in contact with the flange increases up to the point of sealing. Because the surface contact occurs in the early stage of connection, a high level of connecting pressure is required.

• POINT 03

  It is difficult to judge which type is better when it comes to seal characteristics. In general, however, the octagonal form is common used.