 |
 |
 |
Ring joint gasket can be used under the vacuum condition of
1000kgf/cm² and more for high-pressure vessel, tower and
vessel, valve bonnet, etc. including high-temperature and
high-pressure steam, oil, gas, solvent, etc.
There are oval type and octagonal type as its
representative shape, which can be generally used for
pressure of max. 350kgf/cm2 and there is BX type for more
pressure. As for oval type and octagonal type, oval type has
bigger flange groove deformation.
It is because gasket itself is deformed while bolt is extended
until arriving to constant pressure by increased flange
connection pressure and line contact is moved to surface
contact as well. |
| |
Therefore, it has good initial sealing performance but gasket is largely deformed. When Octagonal
type is internally pressured, contact pressure with flange is increased, which is initially connected to
surface contact. So it requests high connection pressure.
But as for sealing characteristics, we can’t clearly say what type is better. Generally, octagonal type
is widely used.
RX type can be used for flange groove of ring joint gasket but BX type can be only used with API-
STD-6BX flange. |
