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HOW TO Reduce flow on the inlet?

HOW TO Reduce flow on the inlet?

HOW TO Reduce flow on the inlet?

(OP)
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.

RE: HOW TO Reduce flow on the inlet?

(OP)
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.

RE: HOW TO Reduce flow on the inlet?

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
www.mcabeeconstruction.com

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

RE: HOW TO Reduce flow on the inlet?

(OP)
Thank you very much Brian.

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