Change Units on a Project

If, in mid-project, it is decided that a units change must occur, either from metric to imperial or vice versa, a change must be made to the labelling units setting in the project configuration file using the Project Configuration Category of the AVEVA P&ID Project Administration program.

Note: Changing the project drawing units is not possible.

Set labelling units to metric or imperial on the Project pane of the AVEVA P&ID Project Administration program. AVEVA P&ID should not be loaded while this file is being edited. The units on existing drawings will only be converted on reload into AVEVA P&ID.

Note: ONLY the labelling units will change and NOT the physical size of the graphical symbols.

Note: Changes to drawings resulting from the label units being changed are not automatically implemented when project drawings are loaded. The user must trigger these changes "manually" in each drawing after it has loaded. Refer to Convert Project Label Units.

If an attempt is made to insert metric symbols into an imperial drawing, they will be inserted 25.4 times bigger than intended due to the 25.4 mm:1" ratio. To correct this it is necessary to edit the symbol lengths using the Symbols Configuration Category of the AVEVA P&ID Project Administration program.

In order to carry out these conversions, AVEVA P&ID uses a file located in the validation directory, named CONV.UNI. An excerpt from this file is shown:

3 = 1/8"

6 = 1/4"

10 = 3/8"

25.4 = 1" etc

Comment lines to begin with a * character. Sizes shown are in <mm>=<inches>.