Saddle location

[vinothhsvk]

Hi All,

I need some clarification on saddle design. I am doing (U-stamp) horizontal vessel(T/T - 7000mm). Initially (before freezing the nozzle elevation) i located the saddle at equal spaced (1450mm from TAN line) from both ends. now one 6" nozzle (outlet nozzle) clash with right side saddle after freezing the nozzle elevation.

My Query is can we locate the saddle at unequal distance from TAN line ( from both ends)? And at the same time can we exceed the limitation of a≤0.25L?

Here,
a = distance from the axis of the saddle support to the tangent line.
L = length of the cylindrical shell measured from tangent line to tangent line for a vessel.

 

[r6155]

Yes, you can.
Design calculation shall be made.

Regards

 

[vinothhsvk]

Thank you.

 

[FMJalink]

Normally the better solution is to move the discharge nozzle, allthough nozzle locations are froozen. Now the saddle location(s) will be changed. If on concrete, anchors etc will have to be relocated. If placed on steel, something similar is applicable. Unfavourble saddle locations may lead to a higher vessel wall thickness. The freezing of the nozzles will prabably be due the (piping) mechanical contract, which I assume went out for enquiry. Small modifications are normally possible.