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Need UG-45 Nozzle External Pressure tb2 Examples

Need UG-45 Nozzle External Pressure tb2 Examples

Need UG-45 Nozzle External Pressure tb2 Examples

(OP)
From Code: "for vessels under external pressure, the thickness(plus corrosion allowance) obtained by using the external design pressure as an equivalent internal design pressure (assuming E=1.0) in the formula for the shell or head at the location where the nozzle neck or other connection attaches to the vessel but in no case less than the minimum thickness specified for the material in UG-16(b)"

Question: Are they any examples of this situation?  

RE: Need UG-45 Nozzle External Pressure tb2 Examples

I just designed a nozzle under external pressure where that exact rule applied. The head was just a narrow annulus designed under appendix 14, so its minimum thickness was below UG-16(b). Does that answer your question?

If not, have you checked the examples in Appendix L-7? That and code interpretation VIII-1-83-199 are really useful in sorting out what UG-45 means.

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