HOW TO Reduce flow on the inlet?

[MonicaLee]

Dear friends,

I have an old Drum (1943):

Dia = 8'ID Length = 30' Test Press =195psi Op Press = 70psi
Temp = 100F Corrosion Allow = 3/16 Thickness of Head =13/16, Horizontal Cap = 12,000 Gal.

According to our calculation, I have pV2 = 9,000, we are trying to reduce less 2,700. Process Engineering recommended to change Inlet Nozzle and Piping from 10" to 12". If I have 12" Nozzle, will that still within ASME Sec. VIII Div. I? What section (UG) should I be looking at the calculation for our enlarged Inlet Openings or should we add another opening to this Drum? Thank you in advance.

Monica Lee.

 

[MonicaLee]

To make my question sample, I would like to ask you: would converting from 10" Nozzle to 12" Nozzle on the above specs affected the Drum's Vessel Code?

Thank you.

 

[waskillywabbit]

Changing the nozzle would be considered an alteration. You'll need to do new calcs for the new nozzle.

ASME Code, Section VIII, Div. 1, Ed-2004, UG 37- UG 45

Good luck.



Brian
Pressure Vessels and Autoclave Systems

http://www.mcabeeconstruction.com

The above comments/opinions are solely my own and not those of McAbee Construction.

 

[MonicaLee]

Thank you very much Brian.