Gasket coefficient and sealing specific pressure
Thread Content
In the design, the gasket needs to use reinforced flexible graphite plate, but its m and y values cannot be found. Can anyone provide them?
To add, the thickness of the gasket is 3mm
Excerpted from: HG20592~20635-1997 Preparation Instructions
Thank you, what is the difference in performance coefficient between enhanced flexible graphite plate and flexible graphite plate?
The so-called "reinforcement" refers to the addition of a stainless steel core plate inside (see JBT 6628-2008 Flexible graphite composite reinforced (plate) gasket), which does not change the sealing coefficient and sealing performance of the gasket.
Yes, the enhanced type has a stainless steel plate or metal toothed plate added in the middle, but its strength has increased and its sealing capacity has increased. How can the preload sealing specific pressure remain unchanged? Is there any basis for this?
I understand that increasing the strength of the flexible graphite really just increases the stiffness of the gasket. Without a metal core board, the flexible graphite board would be very soft and inconvenient to use. The gasket coefficient in the standard is only for reference, and there is no reliable test method to verify it. You can ask the gasket factory to provide a more reliable gasket coefficient, but the flange calculation method of GB150 does not consider the verification calculation of the flange seal. It is only the verification calculation of strength and stiffness. More accurate m and y values seem to be meaningless.