With EngineerMate 's on-screen profile design tool you can adjust pipe size, slope and other parameters on screen on an M.S.Excel spreadsheet. It is contained in a plumbing design package, PlumAL.
This template can be used for any pressure pipeline or gravity full-flow pipeline, such as storm drain. Press the Star button to generate as many pipe sections as you need. Fill data in cells in yellow. The profile will show on screen.