Piping > Routing > Pipeline Insertion and Modification > Propagating the Inserted From Pipeline in the To Pipeline Assembly
  
Propagating the Inserted From Pipeline in the To Pipeline Assembly
Spec-Driven Piping updates the From Pipeline inserted into the To Pipeline, based on the size and specification information that is defined at the Set Start location. During propagation, if a fitting cannot be found with the required size and specification, Spec-Driven Piping prompts you to either terminate the pipeline insertion or insert the pipeline without that fitting.
 
A copy of the From Pipeline becomes a part of the To Pipeline after it is inserted into the To Pipeline.
When you insert a From Pipeline into the To Pipeline, the trajectory of the From Pipeline is copied into the To Pipeline assembly without any external references.
You can use any of the Spec-Driven Piping functionality to modify pipelines that are inserted into the To Pipeline.
A stub-in with a center or tangent offset is not inserted with an offset value. The offset value gets deleted after insertion.