One of the most frequent questions we get is, “How do I set the service on my Pipe Line group?” While I answered this for 2012 here: http://www.pdoteam.com/2012/03/changing-line-group-properties-in-autocad-plant-3d/, in 2013, we have a better option. Open the data manager, and in the bottom left-hand corner is a drop down.
Switch the drop down to Order by Area.
Click the Pipe Lines node, and you will get a list of the pipe line groups where you can edit the service for the whole group at one time. DO NOT pick a line tag as that gives you a list of the components within the line group.