Sherical tank calculation

[gpz]

Hello,
I have to verify an existing spherical tank,
I'll try to do it by formulas, which calculation sw can manage this kind of item?
I mean all the typical matters that are a little different from ordinary vessel: cylindrical braced legs attached to the sphere and local loads on the shell at legs junction proximity.... Is there a spreadsheet?

Thank you

[FATHI]

get the book of Moses "Pressure Vessel Manual " there is a full example there ..including legs--

[gerge22]

bentley vessel has a example of a spherical vessel. you can try it.