Label Reducers

The procedure can be used to label reducers..

Note: The properties of pipes can be completed by selecting another pipe from a list of values on their Properties dialogs. The "child" pipe is then labelled with all the properties of the referenced "parent" pipe.
Reducers placed on "child" pipes automatically reference reducers on the "parent" pipe. When the first reducer is placed on a "child" pipe, it will automatically become a "child" reducer of the first reducer on the "parent" pipe, and assigned its properties. The second reducer placed will automatically become a "child" of the second reducer on the "parent" pipe, and so on.
"Child" reducers cannot be edited. All editing must be done to the "parent" reducers.

Example

Associated Project Configuration Options

• The default format of reducer labels is specified using the Reducer Label Setting field in the Pipes - Settings Sub-Category of the AVEVA P&ID Project Administration program.

• If an error balloon is to be placed when a reducer is not labelled, make sure that the ‘Reducer Not Labelled' Error-Balloon Placement checkbox in the Label Types Configuration Category of the AVEVA P&ID Project Administration program is checked.

• In order for reducers to automatically change orientation, so that the wide end is always connected to the larger pipe size and the narrow end is always connected to the smaller pipe size, the list of values for sizes used on the project (Metric Sizes or Imperial Sizes) set up using the List of Values Configuration Category must be sorted from smallest size to largest size.

• Whether or not reducers will be automatically rotated depends on the setting of the USER_ROTATEREDUMANUALLY user-defined directive in the Miscellaneous – Settings Sub-Category. If set to YES, reducers will not rotate automatically. If set to NO, or if the directive does not exist, reducers will rotate automatically.

• Whether or not auto-labelling is on by default is set in the Miscellaneous - Labels Sub-Category pane.

• The default delimiter character, and other delimiter characters that are available for selection, depend on the setting of the Reducer Delimiter field and the delimiter user list of values in the Reducer Configuration Category of the AVEVA P&ID Project Administration program.

Procedure

Label a Reducer

1. The procedure may operate automatically if auto-labelling for reducers is on. If this is the case, the AVEVA P&ID Reducer Properties dialog displays automatically when an instrument is placed on the drawing.

   If auto-labelling is not on, or to edit an existing label, start the procedure by either:

   • selecting the reducer on The Drawing Page, then selecting Properties from the shortcut menu, or

   • selecting the Properties option in the Properties group of the Home tab.

     Note: Labels can also be viewed using the Non-Modal Properties Dialog, but tags cannot be directly entered into this dialog. Other details can be entered or changed however, and the drawing labelled with them.

2. If the first method of starting the procedure is followed, the reducer is already selected.

   If the other method is followed, the Command prompt will display:

   Select Item to Label, or Label to Modify:

   Pick the reducer symbol to be labelled.

3. The AVEVA P&ID Reducer Properties dialog is the displayed.

   

4. Select the format that the reducer label (Flow Direction, Largest Size First, or Smallest Size First) is to be displayed in from the Reducer Label Format list.

5. If reducer sizes are to be restricted to those valid for the pipe specification, select ‘Yes’ from the Filter By Specification list. The default setting is ‘No’.

6. Both the Upstream Size and Downstream Size fields will pre-populated with the current size of the pipe segment into which the reducer was inserted. The dialog also displays read-only attributes of the owning pipe.

   Change the upstream and/or downstream size to the required value(s). Select the sizes from lists of values either from the Upstream \ Downstream Size field, or from the Upstream Size and Downstream Size fields.

   If the Filter By Specification option is set to ‘Yes’, only those sizes valid for the pipe specification may be selected.

   The lists of sizes are the Metric or Imperial sizes set up for the project using the List of Values Configuration Category of the AVEVA P&ID Project Administration program.

   Note: When upstream and downstream size values are the same, or are not valid for the pipe specification, the sizes and the tag preview are displayed in red text.

   Select the delimiter character to be displayed from the Delimiter list.

7. If the reducer label is to be displayed on the drawing, select Yes in the Add Label field (this is the default setting). If the label is not to be displayed select No. This field is not displayed when editing a reducer that already has a label displayed

   Press OK.

8. The Command prompt will then display:

   Position Reducer Label:

   Place the label. Pipe and reducer labels upstream and downstream of the reducer location will have their sizes automatically modified to reflect the sizes of the new reducer. If this results in another reducer having the same upstream and downstream sizes, an error message is displayed on the drawing, e.g.:

   

   Note: The orientation of the label for example, which diameter is listed first, is controlled by a project configuration setting.

   The orientation of a reducer symbol will change automatically so that the wide end is connected to the larger pipe size and the narrow end is connected to the smaller pipe size

9. If the end of the pipe is connected to the start of another pipe, the user is prompted to cascade the size change onto the connected pipe.

   If the user chooses to do this, the process continues along the connected pipe changing sizes and warning users to change duplicate values as required.

Modify a Reducer Label

A reducer label can be modified by changing the size of the pipe label upstream. The upstream part of the next reducer label will automatically change to reflect this. Reducer labels may also be modified directly.

10. Start the procedure by either:

    • selecting the reducer label on The Drawing Page, then selecting Properties from the shortcut menu, or

    • selecting the Properties option in the Properties group of the Home tab.

    Note: Labels can also be viewed using the Non-Modal Properties Dialog, but tags cannot be directly entered into this dialog. Other details can be entered or changed however, and the drawing labelled with them.

11. If the first method of starting the procedure is followed, the AVEVA P&ID Reducer Properties dialog for the symbol is then displayed.

    If the other method is followed, the Command prompt will display:

    Select Item to Label, or Label to Modify:

    Pick the reducer label to be modified.

12. The AVEVA P&ID Reducer Properties dialog is displayed.

    

    Select the sizes from lists of values either from the Upstream \ Downstream Size field, or from the Upstream Size and Downstream Size fields. Click OK.

    The labels will change to show the new values.

    Pipe and reducer labels upstream and downstream of the reducer location will have their sizes automatically modified to reflect the sizes of the new reducer. If this results in another reducer having the same upstream and downstream sizes, an error message is displayed on the drawing.

    The orientation of a reducer symbol will change automatically so that the wide end is connected to the larger pipe size and the narrow end is connected to the smaller pipe size.

    Select the delimiter character to be displayed from the Delimiter list.

13. If the end of the pipe is connected to the start of another pipe, the user is prompted to cascade the size change onto the connected pipe.

    If the user chooses to do this, the process continues along the connected pipe changing sizes and warning users to change duplicate values as required.

    Note: If a reducer is deleted, the pipe segment that the reducer was inserted into adopts the size of the segment that was upstream of the deleted reducer.