Piping Network Segment

Each piping network segment in the project displays as a record on the piping network segment grid.

Multiple piping network segments can be added to the drawing. Each piping network segment is owned by a piping network system and can own multiple centerlines.

The piping network segment can be modified directly on the grid. Alternatively, select the piping network segment on the P&ID Explorer and modify the attributes.

Piping Network Segment Items

The from and to values indicate the items that are connected to a piping network segment. For example, an equipment item or a nozzle.

To display the from and to attributes, select the piping network segment on the P&ID Explorer.

Open the Attributes window and navigate to the From or To attribute.

If the piping network segment is connected to multiple items, the From or To attribute displays all connected items.

Piping Network Segment Flow Direction

The flow direction of the centerlines and inline components in a piping network segment are calculated by the application. The flow direction is recalculated when a centerline or inline component is added to, or deleted from, the piping network segment.

The members values indicate the flow direction of the piping network segment.

To display the members attributes, select the piping network segment on the P&ID Explorer.

Open the Attributes window and navigate to the Members attribute.

Click ... to display the Piping network segment members window.

Show Arrows

The flow direction of centerlines in a piping network segment can be indicated with arrow heads on the drawing canvas. To modify the show arrows attributes, select the piping network segment on the P&ID Explorer.

Open the Attributes window and navigate to the Show Arrows attribute.

Select True to display arrow heads on the drawing canvas for the selected piping network segment, select False to omit arrow heads from the drawing canvas for the selected piping network segment. The default arrow display value, and the default symbol used to display arrow heads, is specified using the P&ID Advanced Settings in the Configuration module.

Dual Flow Arrows

The flow direction of dual flow centerlines in a piping network segment can be indicated with dual flow arrow heads on the drawing canvas.

To modify the dual flow attributes, select the piping network segment on the P&ID Explorer.

Open the Attributes window and navigate to the Dual Flow attribute.

Select True to display dual flow arrow heads on the drawing canvas for the selected piping network segment, select False to omit dual flow arrow heads from the drawing canvas for the selected piping network segment. The default symbol used to display dual flow arrow heads, is specified using the P&ID Advanced Settings in the Configuration module.

Referenced Items

The reference item at tail and referenced item at head values indicate the items that are connected to the start and end connection points of a piping network segment. For example, a nozzle or a tie point.

To display the reference item at tail and referenced item at head attributes, select the piping network segment on the P&ID Explorer.

Open the Attributes window and navigate to the Reference Item at Tail or Referenced Item at Head attribute.

Attribute Propagation

By default, the following attribute values are propagated from the associated centerline when the piping network segment is created.

If the created piping network segment is connected to a centerline, the following attribute values are propagated from the associated centerline to the piping network segment:

• Bore

• Paint Specification

• Piping Number Identifier

• Number

• Pipeline Fluid Specification

• Pipeline Insulation Specification

• Pipeline Specification

• Pipeline Tracing Specification

Additional attribute values can be defined to propagate from the centerline to the piping network segment using the attribute propagation settings in the Configuration module.

User Messages

When a drawing is opened, each piping network segment is analyzed for errors using the five default rules, additional project defined rules can also be created. The default rules are:

• Centerlines which are not connected to a P&ID item at either end.

• Mandatory attributes which are not populated. These are unique attributes which are setup using naming rules.

• Intersecting piping network segments with mismatching attributes. For example, bore, pipeline specification, tracing specification, insulation specification or paint specification.

• P&ID items with incomplete attributes. For example, bore or specification.

• Piping components with unset component specification reference.

Drawing errors are displayed on the User tab of the Messages window.

Refer to Attribute Propagation for further information.