How do the nozzles and other attachments connect to Bolted Tanks?

All attachments to bolted tanks are through a bolt up connection. Nozzles are welded and built as a separate entity in the shop and are bolted to the tank shell through a nozzle backing plate. These plates are sealed in the same manner as all of the other joints on the tank.

Other attachments such as ladders, pipe supports etc. are connected to the tank shell with a clip bolted and sealed through the tank walls.