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Inverted cone roofs for API-650

Inverted cone roofs for API-650

Inverted cone roofs for API-650

(OP)
I have a client that is looking for an inverted cone roof on a 30 foot diameter tank. Does API recognize this type of installation? Are there issues with type of installation?

Best Regards,

Michigander

RE: Inverted cone roofs for API-650

Assuming you mean a cone down roof where the center is lower than the edge:

API does not recognize this type of roof.

What do you do with water/snow/ice that accumulates?

Should not be too hard to design, look out for additional forces on the upper tank shell.

RE: Inverted cone roofs for API-650

IFRs is right.  API-650 does not recognize this type of roof, but it does not prohibit such a roof.  You are on your own with regard to design procedures of the membrane roof and compression ring.

Joe Tank

RE: Inverted cone roofs for API-650

I think although not directly but in a way;

the open top floating roof type tank's roof(external)

has somewhat inverted cone like design

although not with a very sharp slope from side to centre to appear like an inverted cone.

Best Regards
Qalander(Chem)

RE: Inverted cone roofs for API-650

The membrane analysis similar to that in API-620 should be useful for the design.

RE: Inverted cone roofs for API-650

(OP)
Thanks so much for all of the insights!

Best Regards,

MIchignader

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