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Fabrication Tolerance - Rectangular Tank Top plat flatness

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pnrngv

pnrngv

Mechanical
Joined
May 26, 2019
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17
Location
SA
Hi,
What is the recommended fabrication tolerances for the top plate flatness of the rectangular tank?

There is no limitations or guidance in any of the standards. As a good practice +/- 5.0mm tolerance measured between the distance is < 500 MM should be ok ?

Any expert opinion and references. Please share.

Regards
pnrngv

 
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If there's really no guidelines, ISO 13920 is always a good reference. You'll find lots of tables online.
Standard values are row C and G.
 
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You may want to avoid ponding on top of the tank by dishing it slightly, but too slight a dish can result in oil canning, where the dish can invert.
 
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