Hello Rocky:

I am not sure if is already late for this posting but here I go:
Before thinking in an expansion joint y would come with cheaper solutions. 1- Have you considered to put the support closest to the tank in the same foundation as the tank? This would make the support and the tank move together, and the flexibility of the pipe would absorb the settlement. 2. - If there is no way to accommodate the support, consider using constant support or spring hangers.
A word of advice: Don’t forget to include the elastic behaviour of the tank in your analysis; this would help a lot to decrease the loads in the nozzle's tank. Try to let expansion joints as the last resource for increase the flexibility of piping systems.

Regards,

Pedro Massabié