To export a pipe network from Civil 3D to Hydraflow Storm Sewers:
1. Create and design the pipe network in Civil 3D. 2. Go to the "Analyze" tab > "Hydraflow" panel > "Export to Hydraflow". 3. Select the pipe network to export. 4. Choose the export options and settings. 5. Export the network to Hydraflow Storm Sewers.