You can add spanning labels to pipes in profile view in the same way you can add them in plan view. Just as for pipes in plan view, you can move profile span labels to any connected pipe or structure in the span.
The AutoCAD LIST command is a good method to list the connected pipes in the span.
As it is not always feasible to complete layout before creating labels, you can use spanning labels to annotate pipe spans. Spanning labels are useful in places where you have connected a lateral to a pipe. When a lateral is connected to a pipe, the original pipe is broken at the connection point. A spanning label annotates the two broken pipe segments as if they were still one continuous pipe.
Spanning labels are also useful when you have long continuous pipes of multiple segments such as curves, or when you are using pipes to represent a “flexible” underground utility. The spanning label will label a number of pipe segments as if they are one continuous pipe.