Sizing pipesSizing pipes|
Command |
Workspace: Path |
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Size Pipes |
● Designer: AEC > Irrigation ● Landmark: Landmark > Irrigation |
The diameter of the pipes in the irrigation design, along with the size of the valves and system components, has a direct effect on the pressure and velocity of the water moving through the system, which, in turn, affects the performance of the outlets and the longevity of the pipes and other components. As pipes are placed in the design, they are automatically sized based on velocity, if the Min Diameter Not Exceeding Velocity Limit option is selected.
As a final fine-tuning operation that should take place once the system has been designed, the Size Pipes command calculates the optimal pipe diameter and, optionally, valve and system component size, for each section of pipe based on the pipes in the Sizing List in irrigation settings. The optimally-sized pipes, valves, and system components are determined for a sub-section of the network or for the entire network, depending on the current drawing selection and the options chosen in the Size Pipes dialog box.
The pipes are sized so that each does not exceed its velocity limit (Maximum Velocity, specified in the irrigation settings), each outlet receives sufficient pressure to meet its designed input pressure requirement, and the pressure difference between the first and last outlet in a lateral line is within the Max Outlet Pressure Variation from the irrigation settings. The valve sizes, if valves are selected for sizing, are adjusted to be the most appropriate for the system’s flow rate, based on availability within the catalog for the selected manufacturer and series. When selected for sizing, system components are sized to a version that is closest to the pipe size, if available.
When all pipes are selected for sizing, this command will likely change any previously set pipe diameters and, if selected, valve and system component sizes.
To size pipes, and optionally, valves and system components:
1. Determine the extent of the sizing and select the appropriate object.
● To size lateral pipes in a valve’s zone, select the valve, which must be connected to at least one outlet by lateral pipes.
● To size all the pipes in a system, select the POC.
● To size all the pipes in the drawing, do not select any objects.
2.Select the command.
The Size Pipes dialog box opens.
3.Specify whether the sizing should affect only pipes that have already been sized by the command, or all pipes. A pipe is considered unsized when the Min Diameter Not Exceeding Velocity Limit option in the Object Info palette is selected.
4.Select whether the valves and system components that are connected to the system should also be changed if needed.
5.If needed, click Settings to open the irrigation settings dialog box. View or modify the Pipe Sizing parameters on the Pipes/Tubing tab. Click OK to return to the Size Pipes dialog box.
6.Click OK to size the designated pipes, valves, and system components.
If there are no suitable pipes or valves that meet the requirements, an alert opens.
After the command has been executed, the Object Info parameter Min Diameter Not Exceeding Velocity Limit is automatically deselected for all sized pipes, because the pipes were already sized to the best Nominal Diameter value, within the velocity limits specified in the irrigation settings. There should be no warnings for problem parameters within the network.
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