Add Off-page Connectors, Flow Arrows, and Other Non-Engineering Items to a P&ID Drawing

Items that are placed on a drawing but do not contain any reportable data are called non-engineering items. Non-engineering items include off-page connectors, pins, flags, flow arrows, gaps, actuators, annotations, spec breaks, and so on.

All non-engineering items are displayed on the Non-Engineering tab of the tool palette.

Understand Connectors

Connectors maintain continuity of lines that span across drawings. Off-page connectors are used in pairs: in the originating drawing and in the connecting drawing. A line leaving a drawing requires a To connector. The same line in the second drawing requires a From connector. The same connector symbol is used for both the To and From connectors.

To connectors are placed pointing outward in the drawing:

From connectors are placed pointing inward:

Both connectors should have the same connector number to visually identify the continuity between drawings. It is recommended that you number the From connector before you connect it to a To connector. If a pair of connected connectors do not have a connector number, it is recommended that you assign the same number to the two connectors.

Connectors can also show the drawing numbers (for easy tracking), and tag data.

The following table describes how you display data for an off-page connector (using the From connector example in the previous illustration).

Item in “From Connector” example Represents Where data is entered
CC Pipe line group service In the drawing, click the line to which the connector is attached. Right-click and click Assign Tag. In the Service drop-down menu, click CC.
50011 Connector number Double-click the connector, and in the Properties palette, Connector Number field, enter 50011.
From Tank T-201 Origin or destination Double-click the connector, and in the Properties palette, Origin or Destination field, enter the name of the component that the connector originates from, in this case, From Tank T-201.
PID-111 Drawing number of the connected drawing In the Project Manager, right-click the drawing the connector comes from, and click Properties. In the DWG Number field, add PID-111.

Understand the Rules for Adding Off-page Connectors Between Drawings

Keep the following rules in mind when you use off-page connectors:

Understand Pins

On the Non-engineering tab of the P&ID DIN tool palette are two pin-shaped symbols that you use to identify a segment break. In the KKS tagging standard, pins can identify a change in Unit Number or System Code.

A pin can either be open (no-fill) or closed (black fill):

Pins act like segment breakers. When you insert a pin into a straight schematic line, the pin breaks the line into two segments. However, if you insert an open pin at the end of the line, it does not break the line.

Understand Flow Direction Flags

A flag symbol, like an arrow symbol, indicates the direction of the flow. The flag symbol contains the line number annotation. In your drawings, you can use arrow symbols, flag symbols, or both.

Follow these guidelines when using flags:

To create a line connection between two drawings
To view an existing line connection between two drawings
To add a miscellaneous symbol, connector, or trim symbol to a drawing
System Variables