API650 appendix P wall thickness for nozzle load verification

[cornemo]

Dear,

in API650 appendix P all formulas refer to t, which is the shell thickness at the opening connection.
To calculate the stiffness of the connection, the code differentiates between nozzles with reinforcement on shell (figures P.2a to P.2f) or reinforcement in the nozzle neck (figures P.2g to P.2l).
For the verification of the nozzle loads figures P.4a and P.4b are given. Here no differentiation is made regarding reinforcement.
Does the code automatically consider reinforcement in these figures and does it assume the allowable loads are the same for both types of reinforcement?
Or do we have to use the thickness of the shell+reinforcement instead of the thickness of the shell only to get the Y-factors from figures P.4a and P.4b?

Thanks in advance for your reply.

 

[cornemo]

Nobody with an answer to above question?

 

[IFRs]

You may have to submit an inquiry to API to get an answer.

 

[cornemo]

Thanks for your reply. As this is already an old part of the code, I hoped someone with longer experience had an answer to the question.
I cannot imagine no one has an answer or thought about this and everybody is just doing what they seem fit.