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Fabrication Tolerance - Rectangular Tank Top plat flatness

thread367-476214

Fabrication Tolerance - Rectangular Tank Top plat flatness

Fabrication Tolerance - Rectangular Tank Top plat flatness

(OP)
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

RE: Fabrication Tolerance - Rectangular Tank Top plat flatness

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.

RE: Fabrication Tolerance - Rectangular Tank Top plat flatness

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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