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Vacuum Vessel Design

Vacuum Vessel Design

Vacuum Vessel Design

(OP)
I was wondering about design calculations for vacuum tanks loaded on trucks and their associated vacuum line accessories. At uni, I only ever worked on pressure vessels, and all calculations were based on a higher internal pressure than their surrounding atmosphere. Will these equations be the same for vacuum? Is there any standards in Australia on this type of design? Any thoughts?

RE: Vacuum Vessel Design

Hi Phil,

Vacuum vessels can fail by buckling. This mode of failure is typically not addressed using standard hoop stress calcs etc.

Try have a look at ASME VIII, Div 1, UG-28 through UG-30. Unfortunately this is the only code I could point you to.

RE: Vacuum Vessel Design

I will have to second Kriegfix on this one. Vacuum calcs are a different beast than standard hoop stress calcs. If you google "imploding tanks" you will find a few instances where steam outs of vessels have went wrong. I've included one below.

What ever pressure vessel code you use in Australia will likely have a section about vacuum, or it may be called vessels under external pressure.

Good luck,
K
 

RE: Vacuum Vessel Design

AS1210 is the Australian Standard for pressure vessels - it also includes vacuum vessel design, but also allows design to ASME VIII Div1. It also has requirements for transportable vessels.

I haven't had any involvement with transportable vessels, so it would be wise to check local or federal regulations in that respect, for any other requirements.

Cheers,
John

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