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Design of Jacketed Vessel with Helical Flights

Design of Jacketed Vessel with Helical Flights

Design of Jacketed Vessel with Helical Flights

(OP)
My question is whether helical flights used to direct flow in a conventional jacket can be used as vacuum rings to stiffen the inner shell?  Referring to UG-29 it doesn't reference this type of design.  I would like to use the inertia equations in UG-29 and the pitch of the flights as my (L) dimension to calculate there size.  Also, if I have a shell to be designed for 50 psi/FV and a jacket at 90 psi, I would have to use an external pressure for the shell of 105 psi; is this correct or am I exempt by UG-29 (f)?  

RE: Design of Jacketed Vessel with Helical Flights

Bone...


It is my opinion that you are going in the wrong direction with your selection of HX jacket.

"Conventional jackets" (can within a can with helical rings) are typically used only when the jacket is subject only to modest pressures and no vacuum conditions.They are typically only used for small vessels.

http://www.centralfabricators.com/conventialjackets.php

http://www.centralfabricators.com/halfpipejackets.php

I would change the shell design to the "half-pipe jacket" style.....The ASME rules are well established for this type of design

Yeah, yeah, yeah....I know half-pipe jackets cost more money, but you simply can't change a Ford Pinto into a race car either

My opinion only

-MJC

  

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