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Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Any referenced datasets can be downloaded from "Module downloads" in the module overview.
Maximum velocity constraints can be applied to any fireflow analysis to ensure the available flow at the hydrant maintains the user-specified minimum pressure while the targeted pipes do not exceed the user-defined velocity. Results from this additional constraint can help identify pipes that are exceeding the maximum velocity or experiencing pipeline restrictions.
To perform the fireflow analysis only on the junctions (hydrants) in the domain:
Note: The fireflow simulation will now be limited to the hydrants in the domain; however, the maximum velocity constraint will be applied to all pipes in the system.
To run the simulation:
Note: Ten feet per second is a common velocity constraint used for these simulations; however, check your local standards criteria and use that value if it differs.
The Fireflow report opens automatically in the Report Manager.
To identify which of these two parameters was most constraining to the hydrant available flow calculations:
The results within the Hydrant Pressure at Available Flow field that are equal to the user-defined Residual Pressure setting, or 20 psi in this example, indicate that the Hydrant Available Flow was constrained by the residual pressure. Values greater than the user-defined Residual Pressure mean that the Hydrant Available Flow was recalculated and constrained by the critical pipe velocity.
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