Flat bottoms in ASME BPV VIII???
Flat bottoms in ASME BPV VIII???
(OP)
Friends!
My customer says he needs a gas boot with torispheric head at top, flat bottom resting on earth, anchor bolts at periphery and a design pressure of 10 psig.
And he says it is to be designed&constructed per ASME BPV sec. VIII div 1.
Is it possible or is he crazy? I'm not sure at all...
Thanks for your help.
Heyner
My customer says he needs a gas boot with torispheric head at top, flat bottom resting on earth, anchor bolts at periphery and a design pressure of 10 psig.
And he says it is to be designed&constructed per ASME BPV sec. VIII div 1.
Is it possible or is he crazy? I'm not sure at all...
Thanks for your help.
Heyner





RE: Flat bottoms in ASME BPV VIII???
Even rib reinforced flat heads are not allowed by ASME VIII.
prex
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RE: Flat bottoms in ASME BPV VIII???
If the pressure vessel is designed with two dished or formed heads and installed vertically then the lower head can could have a skirt support. If the pressure vessel is to be installed horizontal the pressure vessel could be mounted on saddles.
RE: Flat bottoms in ASME BPV VIII???
The reason is that the design pressure specified (10 psig) is outside the scope of ASME Section VII Division 1. The design pressure must be equal to or greater than 15 psig. See U-1 for details and other terms of the scope of Div 1.
RE: Flat bottoms in ASME BPV VIII???
Sorry, I disagree with your interpretation that "The design pressure must be equal to or greater than 15 psig." I do agree that people involved with the Code should read U-1.
In particular, U-1(c)2 explicitly states that "Based on the Committee's consideration, the following classes of vessels are not included in the scope of this Division; however, any pressure vessel which meets all the applicable requirements of this Division may be stamped with the Code U Symbol:"
Just because the design pressure is say 10 psig doesn't mean that you cannot U stamp the vessel. What it does mean is that as far as the ASME is concerned, you don't have to stamp it. This distinction is critical where jurisdictions demand that vessels within the scope be stamped.
jt
RE: Flat bottoms in ASME BPV VIII???
RE: Flat bottoms in ASME BPV VIII???
RE: Flat bottoms in ASME BPV VIII???