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Junctions for Pipings

For the planning of pipings in the P&I diagram, you can use the new connection symbol "Junction". A junction has three connection points, of which two pass through the connection, while the third is the place where the connection ends. When you place such a symbol on an autoconnecting line in the P&I diagram, a new pipe segment is created from such junction, rather than a complete second connection, as would be the case in electrical engineering.

Generated connections

The following figure shows the situation when three functions / devices A, B, C are connected to each other via a connection symbol D through autoconnecting lines.

By using a junction as connection symbol D, the following connections are generated in the P&I diagram:

Source

Target

A

B

C

LN 100

Insert junctions

To insert a junction, select the menu items Insert > Connection symbol > Junction. The junction symbol hangs on the cursor and can be placed on the page. Using the [Tab] key, you can browse the existing variants. The actual junction from a straight or angular connection is identified in the symbol by way of an arrow. There is no property dialog for junctions.

The arrow for identifying the junction is located on the layer EPLAN555 for connection symbols. The default settings for this layer have been chosen in layer management such that the arrow is not visible in the graphical editor and while printing. To show invisible elements, such as this arrow, on a page again, press the [U] key.

When inserting the symbol, the hidden elements are always visible, and the displayed arrow allows for the selection of the correct variant.

Tip:

For junctions, the SPECIAL symbol library contains the two new symbols TPIDA (junction at angular connection) and TPIDL (junction at straight-line connection). If, after selecting the menu items Insert > Connection symbol > Junction, you press the [Back] button, the symbol selection opens, and you can select one of these two special symbols.

See also