Opening In Flat Head As Per ASME Section VIII Division 2

I checked in Pv-Elite. Exemption of reinforcement calculations is not allowed

There is, or at least used to be, a provision exempting nozzles of 3 inches or less from reinforcment; I don;t remember if it applies to flat heads versus shells only.

There also is, or was, a provision exempting "vessels" of 6 inches I.D. or less from the Code. These small vessels might then fall under a Code for piping components, or under UL or similar rules.

Probably you are talking about division 1 where up to 89 mm opening allowed for shells whose required thickness is 10 mm or below

Hello Sir,

How to verify the blind flange thickness as per ASME SEC VIII Div I. Refer below data for flange

Flange OD = 1100mm

Flange Thk. = 80mm

The blind flange has Dia.45mm 24 Nos. openings and 5Nos. Nozzles are mounting on it. Refer below sketch for your reference. Nozzle N1,N3,N2,N4 are 2"NPS and Nozzle N11 is 3" NPS.

Please provide your suggestion on the above query.

Thanks & Regards,
Vishal Mistry