Introduction to mechanical settings for duct and pipe standards

Step-by-step guide

Access and review the key settings and options for duct and pipe standards.

1. Start a new project using the template Mechanical – Default.rte.
   
2. On the Systems tab, HVAC panel, click the Mechanical Settings dialog launcher.
3. Under Duct Settings, select Angles.
4. Select Use specific angles.
5. In the list of angles, deselect all options except 45°.
   
6. Review the size range and options for Rectangular, Oval, and Round ducts.
7. From the list of available Round sizes, for 4 1/2", deselect Used in Sizing.

This allows the user to select this size, but prevents it from being selected when using the duct sizing tools.

8. Select Calculation and review the options for calculating the pressure drop in a straight segment of duct. Also, note the Revit parameters shown in bold that are used as part of each calculation.
9. Under Pipe Settings, select Segments and Sizes to review the available segments.
10. Click Create New Pipe Segment.
11. In the New Segment dialog box, select Material and Schedule/Type.
12. Set the Material to Steel, Carbon.
13. In the Schedule/Type field, enter "Schedule 20".
14. Under Duplicate the size catalog from, select Steel, Carbon – Schedule 40.
15. Click OK.
    
16. Add and remove sizes from the size catalog as required for the Schedule 20 segment.
17. Under Pipe Settings, select Fluids to review the available options.

Fluids are applied to piping systems, and their properties will have a bearing on the outcome of any pipe sizing that is carried out.

18. Click OK.
    
19. Draw a short section of pipe.
20. Highlight and select the piping system.
    
21. In Properties, click Edit Type.
22. In the Type Properties dialog box, review the options to change the fluid type and fluid temperature.
23. Click OK.
    
24. In the Mechanical Settings, under Pipe Settings, select Slopes.
25. Click New Slope.
26. In the New Slope popup, enter a value of 1.
27. Click OK to create a new slope of 1" / 12".
    
28. Under Pipe Settings, select Calculation and review the information on the Hydronic Networks tab.
29. Select the Pressure Drop tab and review the options for calculating the pressure drop in a straight segment of pipe.
30. Select the Flow tab and review the information relating to calculation for those piping systems using Fixture Units, such as domestic hot and domestic cold.
31. Click OK to close the Mechanical Settings dialog box.