Indicates where the nozzle reinforcement is located. This entry is used to interpolate among the charts in API-650 Appendix P. If reinforcing on the shell is indicated, Appendix P makes the following assumptions:
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The reinforcing pad thickness is equal to the shell thickness.
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The pad diameter is twice the nozzle diameter.
These assumptions are implicit in the curves presented in Appendix P and are automatically considered by the software.