1. Sometimes when the baseplate is added, the eigensolver doesn't come to a solution. If this happens. Turn of the eigensolver in the configuration.

2. I'm afraid I don't understand this question.

3. If standard ASME B16.5 flanges are calculated according to ASME VIII on their given pressure-temperature rating, they always fail. Do a search on this forum and/or on eng-tips.com and you will find more info about it.