A pipe system is the same as a pipeline in a facility and main equipment like
column, heat exchanger, reactor, pressure vessel or pump is entered as to-object
for this pipe system. It is usually not recommended to enter to-object relations
on secondary equipment (valves, ventilation, drains, instrument measuring
equipment and so on) on detailed pipe segments. It's more common to be used for
main equipment and pipe systems. This enables work and preventive maintenance to
be monitored and planned by using main equipment and all pipe lines that are
arriving to it. For example, monitor and plan all work for a pressure vessel and
pipe lines that are arriving to the pressure vessel.
This structure could be created in two different ways: