Gasket Area in PCC-1 Appendix O

Can you calculate gasket area?

Out of all of the complexities regarding modern gaskets, Gasket Area should not be something that designers are still getting wrong. 

And yet here we are…

I’ve met Owner/Operators who love to order gaskets with a larger outer diameter than the raised face outer diameter so they can “see the gasket”. That’s fine enough but using that outer gasket diameter in ASME Appendix 2 Flange and ASME PCC-1 Appendix O calculations is not. Please be careful not to include the gasket area outside of the raised face diameter. 

Another common calculation mistake arises when the gasket diameter fits within the flange raised face diameter. Many times designers use the flange raised face diameter instead of the actual gasket diameter. This is usually because the raised face diameter is the “default” value in the spreadsheet they are using. Please be careful to use the actual gasket area when it resides within the flange raised face diameter.

Are the ASME Appendix 2 Flange and ASME PCC-1 Appendix O calculations causing difficulties for your overworked engineering department? Did you know Metalmark Engineering offers on-site training to teach your team how to use modern software solutions?