Specify Branch Sizing Constraints
- Select the sections of pipe being sized.
- Click Multi-Select tab
Analysis panel
Duct/Pipe Sizing. - In the Pipe Sizing dialog, select a sizing method from the drop list: Velocity, or Friction. Specify one of the following options associated with the selected method:
- Only to size pipes according to the parameters for the selected method (Velocity or Friction) exclusively.
- And to force sizing pipes to meet the parameters that you specify for both Velocity and Friction.
- Or to allow sizing pipes according to the parameters of either Friction, Velocity, or both.
- Select one of the following Constraints from the list:
- Calculated Size Only - The size of the selected pipe segment(s) is determined by the selected sizing method and is not otherwise constrained.
- Match Connector Size - The size of the selected pipe segment(s) in the branch is determined by the size of the connector used between the branch and the main, up until the first junction in the network.
- Larger of Connector and Calculated - The size of the selected pipe segment(s) is determined by larger of two determinants. If the connector size is smaller than the size calculated by the sizing method, then the calculated size will be used. If the connector size is larger than the size calculated by the sizing method, then the connector size will be used. For example, select this option to avoid supplying a plumbing fixture with a pipe segment that is smaller than the size of the connector on the fixture.
- If necessary, click Restrict Size and enter a value to specify an absolute limit to the size of the selected pipe segment(s).
You can constrain the size of pipe segment(s) by selecting an option from the Constraints list and using the Restrict Size option to specify an absolute limit on the size of pipes.