Hi,
I see it's possible to do it in Autoplant as per the wiki below:
Can the same thing be done in OPM?
Hi Tuan,
Yes, it can be done in OpenPlant Modeler as well. You just need to modify the variable given in Project PCF file i.e.OPM_MATCH_PROPERTY_MAP_RATING
Please refer below wiki article for this:
http://communities.bentley.com/products/plant/design___engineering/w/plant_design_and_engineering__wiki/17003.how-to-set-inletoutlet-ratings-on-relief-valve
Regards,Harpreet