Skirt vs. Legs for vertical pressure vessel
Skirt vs. Legs for vertical pressure vessel
(OP)
Hello every one,
I know skirts have better load distribution on the shell/bottom head, act better in cyclic services and less local stresses, and legs give better ventilation and better access to bottom nozzle. I would appreciate if anybody let me know other limitation and advantages of these two kinds of supports.
Thanks in advance
SP
I know skirts have better load distribution on the shell/bottom head, act better in cyclic services and less local stresses, and legs give better ventilation and better access to bottom nozzle. I would appreciate if anybody let me know other limitation and advantages of these two kinds of supports.
Thanks in advance
SP





RE: Skirt vs. Legs for vertical pressure vessel
Large or tall vertical vessels are usually supported on skirts while small to medium sized vertical vessels are usually supported on legs. Now to distinguish what is small or medium sized vessels, I use Bednar's guidelines for leg supports...
Maximum D = 6'-0"
Maximum H/D = 5
Maximum L/D = 2
where:
D = diameter
H = tan-tan length
L = leg height
RE: Skirt vs. Legs for vertical pressure vessel
RE: Skirt vs. Legs for vertical pressure vessel
In terms of cost, legs will be the better choice most of the time. We usually use angle iron for the legs with repads on the leg to shell attachment for better stress distribution.
RE: Skirt vs. Legs for vertical pressure vessel
My opinion only
Regards
RE: Skirt vs. Legs for vertical pressure vessel
I have found this to be an adequate solution on many projects.
As per the use of legs, half skirts should not be subjected to vibration / fatigue