Oil pipe question on side of oil pan

[Bob from Northport]

The photos show the end of the oil pipe that mounts on the outside of the drivers side of the oil pan. Runs from the oil pump to the pan. The endo uses a rubber seal inside the oil pump that goes over the pipe and is secured to the pump. After cleaning, I see a metal ring on the end of the pipe. Is that ring that holds the seal part of the seal?? Or secured to the pipe permanently??