It depends what the permissible nozzle loads are intended to guard against.

For example, permissible pump nozzle loads for centripetal pumps are intended to guard against long term damage against the impeller/bearings, and not an outright yield or fatigue of the casing itself, thus do not provide specific guidance against occasional load as described.

Alternatively, ASME pressure vessel nozzle calculations expressly require it.

Contrarily, FRC tank nozzle permissible loads are so small that they can't withstand any meaningful load, thus wind and seismic are impractical.