-
Use Set Start Point
and Set End Point 
on the Point Cloud toolbar to position measurement points over the ends of the pipe. An example is shown below.
The software displays the coordinate values in the Point Cloud Measurements window accordingly, and computes the distance between the two measurement points.
-
Drag Start/End Points Distance
from the Point Cloud Measurements window to the corresponding location on the referenced piping sketch in the Detail window.
The selected pipe highlights so that you can confirm where the data is applied.
-
Select File > Save
to save your changes.