Opening on Blind Flange

[Zan00]

Hi all, currently im designing a blind flange (28") for an LPG storage tank based on the asme sect 8 Div 1.
The blind flange had two threaded opening, 2" npt and 1-1/4" npt. Based on UG-36, i understand that this size of opening do not required reinforcement calc. Does this mean that i can just proceed this opening on the ANSI 300 28" blind flange?

Hope someone can help me on this. tq

 

[Geoff13]

UG-39(a) addresses opening in flat heads. This does reference the rules in UG-36(c)(3) for opening size and spacing limits.

If you meet these size and spacing limits then the blind flange does not need to be reinforced for these openings.

 

[David3399]

I would no longer call this a blind flange...now is a bolted cover and needs to be designed to UG-34.