The design parameters here are too vague that nobody can realistically provide useful advice.
General advice:
• Model the nozzle as piping instead of an anchor. Model the vessel, too. At -12F, it's likely growing and shrinking, as well.
• Reroute the piping to allow for flexibility. Add an expansion loops.
• Support the piping to prevent growth. Add limits as needed, but only if you can't add flexibility.