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API-620 - Pressure limits to Flat Bottoms

API-620 - Pressure limits to Flat Bottoms

API-620 - Pressure limits to Flat Bottoms

(OP)
To all,

I am aware of the 2.5 to 15 psig pressure design limits for tanks designed to API-620.

What are the practical pressure and diameter limits for flat bottomed tank design ?  

At what combination of pressure and diameter make a flat bottomed tank unecononomical and make a tank with two dished ends a better choice ? (assume carbon steel at ambient temperature ?

For example, assume a 12 foot diameter tank, 33,000 gallons designed to 14 psig......is an API-620 design (flat bottom) or a "non-coded" ASME-VIII design (horizontal with dished heads) more econonomical ?

Is there some general criteria that could be used/shared here ?

Thank you for your input....

MJC

  

RE: API-620 - Pressure limits to Flat Bottoms

Please see my answer to your identical question posted in another forum.

Steve Braune
Tank Industry Consultants
www.tankindustry.com

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