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Nozzle load verification through resultant

Nozzle load verification through resultant

Nozzle load verification through resultant

(OP)
Is it possible to accept calculated resultant Force and resultant moment compare with allowable resultant force and resultant moment and neglect the individual force and moment component even they are higher than allowable individual force and moment component.

This is the case for cracking and treating reactor nozzle load.

Please let me know is this correct approach or not?

thanks

RE: Nozzle load verification through resultant

Perhaps, if your force is not in a principal plane? Let's see the calculation.

I hate Windowz 8!!!!

RE: Nozzle load verification through resultant

(OP)
Well these forces and moment values are coming from Autopipe model in X, Y and Z direction. I am not sure what is principal plane.

RE: Nozzle load verification through resultant

Probably not.

I hate Windowz 8!!!!

RE: Nozzle load verification through resultant

Quote:

for cracking and treating reactor nozzle load
This probably means that you are dealing with a Division 2 vessel. If you have calculated the nozzle loads using nozzle flexibility (you are doing that, right?), then forget the so-called allowable loads and submit them to the fabricator for review.

This whole concept of allowable loads is, in my opinion, bunk. There are an infinite number of permutations and combinations of the 6 forces and moments that would result in Protection Against Plastic Collapse being just met. And, don't get me started on the so-called secondary stresses, which really relate to Protection Against Ratcheting - these must be based on operating load ranges, not singular design loads.

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