A line segment, referred to as "Pipe Run" in the software, is a section of the pipeline that has a "from" and "to" relationship to other objects in the design basis. These objects include nozzles, off-page connectors, other line segments, and so on. Each line segment also has relationships to the in-line instruments within that line segment and to the off-line instruments connected to that line segment. A line segment is equivalent to a PIDPipingConnector in Smart P&ID.
When a line segment is retrieved into the line list authoring environment from a SmartPlant document that has a relationship between the PIDPipingConnector and the PBS unit, a corresponding relationship is created between the line segment and the PBS unit in SmartPlant Foundation.
Since line segments are part of the design basis for the line list application, they are not editable. Line segments can only be created, deleted, or modified by retrieval from another application, typically a Smart P&ID application.
Although line segments are not editable, the relationship between a line segment and the corresponding line list record is created and deleted from within the line list application.