As per,


Interpretation: VIII-1-01-105
Subject: Section VIII, Division 1 (1998 Edition, 2000 Addenda); UG-34 and UG-39
Date Issued: December 7, 2001
File: BC01-336

Question: A circular blind flange, used as an unstayed flat head, has a nozzle attached at its
center using a full penetration weld, or a partial penetration weld, or a screwed connection. Are reinforcement calculations per UG-39 of Section VIII, Division 1 required for this geometry if the opening in the blind flange is of a size that is permitted in the flange standard referenced in UG­34(c)(1)?

Reply: No.


Can you say that what is the permissible opening diameter for the standard blind flange of size 24"x300# having MOC : SA 105 ????