Is there any problem in having 2D Vertical loop in very high pressure steam piping in rack ?

Due to some supporting problem 3D horizontal loop can't be provided and engineering contractor has suggested 2D vertical loop for a very high pressure steam piping in rack.

Given adequate steam drains at low points and vents at high points and slopes for drain, I don't find any problem in the above proposition. I expect opinions of our forum members on this issue.

regards,

Sam