Enter the maximum diameter for material contributing to nozzle reinforcement.
An example of a diameter limitation would be two nozzles close together, or a vessel seam for which you did not want to take an available area reduction.
A hillside or Y- angle nozzle makes a non-circular hole in the vessel. So, the diameter limit in the longitudinal and the circumferential planes is different. For this type of nozzle, enter the smaller diameter limit.