Two phase separator internal baffle plate

[vessexst]

Hi all,

I want to ask a question related to internal welded baffle plate for a two phase separator.
In order to calculate the plate thickness, I have currently used formulas available for rectangular plate of a tank given in Megeysey pressure vessel handbook

Is my approach correct? Is there any method to calculate the thickness of this welded baffle plate used for hold up of fluid and allowing separation of Air and oil

Design P: 150 Psig
Design T: 200 Deg C
MOC: Sa 516 70 (both for shell and internal baffle plate)

 

[LittleInch]

Drawing / sketch?

what's the plate doing? Just reducing swell or acting as a liquid hold back. Can't work out why you're doing this for a 2 phase liquid / gas separator??

Internal pressure is irrelevant.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[vessexst]

@little inch: It is basically used to hold the liquid to a level of 1.8 metres to achieve separation through hold up

Have never performed calculations before. However, want to do since the height of plate is 1.8 metres and need to check for hydrostatic forces impact on this plate and the buckling etc

 

[Some Curious Guy]

Most people will use the formulas given in "Roark's formula for stress and strain" Handbook. There are formulas given for almost all geometries, end constrains and loading condition from which you can chose your case and design the baffle.
Pressure vessel handbook by Dennis Moss is also a must have. It has a chapter on baffle design which is suited to your requirements.

You can easily get a copy on the net if you search hard enough.

 

[LittleInch]

Still don't understand why you want a plate - that's usually for 3 phase separation.

But usually there is a frame you build to take the hydrostatic forces otherwise the plate tends to get rather thick and you get all sorts of issues with the connection onto the skin of the pressure vessel itself.

what's the diameter of the PV itself?

A sketch /drawing will help a lot.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[r6155]

Handbook by D. Moss is the best way.
The baffle generate a confined space. Be careful during construction and in service inspections. In general it is impossible to access to the other side, and two manhole are required. Corrosion added for both sides.
Alternative one manhole in shell and one manhole can be installed on the baffle: hole d= 600 mm and blind plate d= 700 mm same thickness of baffle, bolted with SS stud bolts welded to the baffle, gasket full face diam 700 / 600 mm.
Design pressure is the liquid height 1800 mm (with density of water) in your case .
Before pressure test a water test should be made filling to 1800 mm and check for leaks of welds in the baffle.

Regards

 

[vessexst]

Thank you all for your feedback!!