Multiple Saddle Analysis

[waskillywabbit]

I've done a Zick and found a saddle size that will support the weight of the vessel (106" ID, 145 T-T, 1" thk CS) only using the (2) saddles. I've been reading and researching the forums for ideas/ways to use the Zick method for getting a sound engineering design on a multiple saddle pressure vessel. The desire for a multiple saddle vessel is two-fold: (1) On one end of the vessel there is an autoclave door, which adds a lot of weight and (2) distribution of the total weight for the foundation (especially at hydro, it will weigh over 1 million lbs).

I've thought about taking the worst case scenario where loading is concerned, which would be on the end where the autoclave door exists and doing a Zick between the saddle for the door and what would be the next closest saddle and adding the loads present for the total vehicle concerning that section.

Any suggestions?

Brian
Pressure Vessels and Autoclave Systems

http://www.mcabeeconstruction.com

The above comments/opinions are solely my own and not those of McAbee Construction.

 

[MJCronin]

waskilly...

Have you reviewed this thread ?

http://www.eng-tips.com/viewthread.cfm?qid=26636

Aside from the possible exception for PE/Plastic tanks, (which are much more flexible) multiple saddles are a bad idea.

Contact the people at COADE in Houstone (

http://www.coade.com)

and pose your question there......

Please complete this thread and let us know what your final design

MJC

 

[jte]

And this thread: thread794-91046

jt

 

[LSThill]

Team Members

I do know of the technical paper for Multiple Saddle Analysis, University Of Singapore.

 

[waskillywabbit]

I did some more digging and massaging of the calculations and got a (2) saddle design to work for now, as I am not a proponent of multiple sadde design, so I generally try my best to avoid it, although some customers insist upon it.

Thanks for the input folks.

Isthill, got a link for that paper? I'd be interested in reading it for future reference.



Brian
Pressure Vessels and Autoclave Systems

http://www.mcabeeconstruction.com

The above comments/opinions are solely my own and not those of McAbee Construction.