Support Lug 1

[abangbikerz]

We need to design a vertical vessel with a cone section at the bottom. Problem is due to stress discontinuity at the cone to shell junction & reinforcement requirement, a stiffener ring had to be installed near the shell to cone junction. The stiffener ring now due to its position will obstruct the vessel support beam. I dont think it is a good idea to move the lug away from the vessel(to avoid the stiffener ring) as it increase the moment arm. I plan to installed support lug on top of the stiffener ring where the lug will sit on top of the stiffener ring and the stiffener ring will bolted through for vessel support purposes. Meaning that the stiffener ring will act as both stiffener ring and base for the support lug as well. Is this practice considered to be acceptable. Thank You

 

[saplanti]

I wish you can sketch your idea showing the ccylinder cone section ares with stiffeners and the lug to make sure we dont misunderstand your idea.

The stiffeners are commonly used in that area to overcom buckling asa well as to support vertical vessels. But generally the support beams or columns are located under the lover reinforcement ring.

I hope this is your case. Plesae sketch your idea to get adequate answers.

 

[abangbikerz]

 

[r6155]

See Pressure Vessel Design Manual 4th Ed. Dennis R. Moss and Michael Basic

Regards

 

[saplanti]

Depending on the cylindrical vessel height, occasional loading, process and other vertical loads, you may need another reinforcement ring where the tips of lug supports. It seems that you are on the right track however luck of knowledge. r6155 gave you one of the reference book that you can follow this kind of calculations. But there may be some more need to be done by depending on the process. You may probably need to read some books about silo design. But I trust that you know what you are doing.