Reverse Pipe and Signal Line Flows

This procedure is used to reverse the flow of a pipe or a signal line.

Note: Reversing the flow of a pipe will not reverse the flow of a branch that loops off and then back onto a pipe. Reversing the flow of a branch will not reverse the flow of the owning main pipe.

Signal lines do not have flows in a process sense. The procedure is used to reverse the direction in which a signal line is drawn.

Note: Pipes may be set to bi-directional flow using Bi-Directional Flow field on the AVEVA P&ID Pipe Properties Dialogs.

Note: Not applicable to drain pipes.

Procedure

1. Start the procedure by either:

   • selecting the pipe on The Drawing Page, then right-clicking and selecting Pipes>Reverse Flow from the shortcut menu (this option is not available for signal lines), or

   • accessing the AVEVA P&ID Pipe Properties dialog and selecting YES in the Reverse Flow field, or

   • selecting the Reverse Flow option in the Modify group of the Home tab.

2. If the third method of starting the procedure is selected, the Command prompt will display:

   Pick a pipe groups to reverse flow:

   Pick the pipe or signal line the flow of which is to be reversed.

   If the first or second methods of starting the procedure is selected, a pipe will already have been selected.

3. The flow of the selected pipe or signal line is then reversed. The pipe is automatically redrawn to reflect this, for example, the flow arrows change direction and the start and end nodes swap ends. In the case of signal lines, any symbols that are part of the line change direction.

   Labels on either side of a spec break, both on the pipe and on the break symbol, are also updated automatically: the pipe property that is different on either side of the break changes from one side of the break to the other, and the labels are changed to reflect this.

   Reducers in pipes change direction if the pipe flow is reversed. However the labels of reducers do not. They must be rotated manually.