Refer to ASME UG-39(d) that gives you an alternative to checking the reinforcement on the blind flange.
In PV Elite you have both options,
If you check the reinforcement, then add a nozzle on the blind flange.
If you want to check the alternative way, then after you modeled the blind flange then on the input screen, on the bottom there is an option for "Evaluate Uniform Patterned Holes". Check that and specify the input.
Edited by Mandeep Singh (11/04/09 10:28 AM)
Edit Reason: added details
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Best Regards,
Mandeep Singh
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Hexagon PPM