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Floating Suction Design

thread1452-294273

Floating Suction Design

Floating Suction Design

(OP)
I need to design a floating suction and want to establish how buoyant the float should be. We are designing for a tank of 5.9m Dia x 7.5m High with only one single swivel elbow. This will mean that the when the tank is filled to the top the float will be submerged so I do not want to make the float lighter than it should be.

As the float is not required to lift the entire weight of the pipe I would like to know what percentage of the weight it should be designed to lift. Either a rule of thumb or pointers into design calculations would be appreciated.

RE: Floating Suction Design

I don't know that there's a good substitute for just going into detail with the things.  I've use a spreadsheet to calculate center of mass and center of volume, which lets you calculate buoyant uplift.  For a partially-submerged float, this involves some iteration to find the product depth corrosponding to a particular suction angle.

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