ASME VIII Div 1, No Nozzle, Reinforcement calcs?!

[T1mmy]

Hi All

I'm designing a pressure vessel to ASME VIII Div 1 and
basically the shell has not got a nozzle. Its Ellipsoidal
dished ends with an 89mm hole machined out of one end and
50mm out of the other end. Does it need reinforcement and if so:

How would I calculate this?
Would I set tn as zero in the equation in UG-37?
The vessel isn't subject to Rapid Pressure Fluctuations!

 

[vesselfab]

is there something welding or boltin in those holes??

the code says ""openining"" must be checked for adequate reinforcement.

how do you hydrotest this vessel with open holes

 

[T1mmy]

No welding, a flanged connection with a retaining ring
fits into the larger end and a flanged connection slots into
the smaller end from inside (before the larger end is sealed), both are bolted from the outside with large
nuts. As a bladder accumulator.
Hydrotesting is done with this arrangement in place.

 

[SnTMan]

T1mmy, depending on dimensions, you may be able to exempt both openings per UG-36(c)(3).

Otherwise, perform calculations per UG-37, with all quantities related to a connection set to zero. Your only available reinforcement will be the excess thickness in the heads.

Regards,

Mike