Asme 16.20 gasket material
Asme 16.20 gasket material
(OP)
I am looking to simplify the gasketing process for my maintance department. Our spec and stock vary between the 4 winding materials 304, 304L, 316, 316L and the fillers PTFE and Graphite. Does anyone know the reasoning if there is a different in the use of the different Stainless steels? My current believe is that the L does not matter, and also 316 will outperform 304.





RE: Asme 16.20 gasket material
RE: Asme 16.20 gasket material
All gasket materials used are purely based on the "service" of each equipment. You can not arbitrarily substitute one with the other without consulting to a material engineer who also familiar with the service.
Gasket supplier, such as Flexitallic, will be able to give you a guideline based on service. Contact them first. "Pressure vessel handbook" by Megyesy, has a section talking about chemical resistance of gaskets for your reference.
RE: Asme 16.20 gasket material
RE: Asme 16.20 gasket material
Confirm that your service is chemically compatible with either 304 or 316 an then standardize on one if compatibility allows.
Do you need both PTFE and Flexible Graphite fillers? Can you standardize on one; preferably FG?
Don't specify and use CGI (inner ring) style SW gaskets unless you have problems created by inward buckling. Inner rings double or triple the price of the SW gasket, they can protrude into the pipe bore creating turbulence, and they make the gasket much stiffer requiring higher assembly bolt loads to seat the gasket.
If inward buckling is an issue you should evaluate anti-buckling SW gasket designs: Garlock EDGE or AB-326