Intergraph SmartPlant Spoolgen (now managed by Hexagon) is not free; it is high-end industrial software requiring a paid license.
If you are a hobbyist or a small shop that cannot justify the cost of Spoolgen, you might look into: FreeCAD (with Macro/Plugins): intergraph smartplant spoolgen free
: Allows users to add fabrication info, change weld types, and modify elbows to bends without needing deep CAD expertise. Free Alternatives for Students/Individuals Intergraph SmartPlant Spoolgen (now managed by Hexagon )
. However, when you purchase a license, you often receive a companion license for Smart Isometrics to handle manual sketching. when you purchase a license