Connecting the Head or Tail

Keywords

CONNECT

Description

The CONNECT command, when applied to Branches (or Hangers), sets up the Head or Tail to match exactly the item to which it has been connected. For example, if the Head is connected to a 3-inch flanged-faced nozzle at E3000 and pointing North, the CONNECT command will set all the Head attributes (HBOR, HCON, HPOS and HDIR) to corresponding values. In addition, the Head and Nozzle are logically ‘tied together’ by two attributes which ‘point’ to each other - the Nozzle CREF will point to the Branch, and the Branch Head Reference (HREF) will point to the Nozzle.

The final effect of CONNECT, which only applies to Heads, is that the Tube (or Rod) that may be required between the Head and the first Component is automatically selected.

A Branch Head or Tail can connect to the following items:

• A Nozzle

• The Head or Tail of another Branch

• A ‘free’ p-point of a multi-way Component in another Branch (for example, a Tee)

  Examples
  CONN PH TO /1205-N5 (Where /1205-N5 is a Nozzle)	The Head attributes of the current element (Branch or Hanger) are set to match the position, orientation, bore and connection type of the Nozzle (refer to the Connecting a Branch Head or Tail image).
  CONN PT TO LAST MEM	The Tail attributes of the current element will be set to match the Leave Point of the last Component (that is not an Attachment point).
  CONN PT TO /100-A8/T2 (Where /100-A8/T2 is a TEE)	The Tail attributes of the current element will be set to match the free p-point on the specified TEE (refer to the Connecting a Branch Head or Tail image).
  CONN PT TO P4 OF /VF205 (Where /VF205 is a VFWA.)	The Tail attributes of the current element will be set to match the specified p-point.
  CONN PH TO PT OF /100-A8/1 (Where /100-A8/1 is another Branch)	The Head attributes of the current element will be set to match the Tail of the specified Branch.
  CONN PH TO ID NOZZ@	As in the first example, but with the Nozzle identified by cursor selection.

  Note:
  Before a CONNECT command is given, the Branch Specification attribute must be set. Connection to elements not within the designer’s jurisdiction (Read Only) will cause an inter-DB connection macro to be created automatically (refer to Inter-DB Connection Macros for further information).

Command Syntax

>-- CONnect <marke> TO --+-- <marke> --.
                         |             |
                         ‘-- <gid> ----+-->

Querying

>-- Query --+-- PHead --.
            |           |
            |-- HHead --|
            |           |
            |-- PTail --|
            |           |
             ‘-- HTail --+-->

>-- Query --+-- HPosition --.
            |               |
            ‘-- TPosition --+-- WRT --.
                            |         |
                            ‘-- IN ---+-- <gid> -->

Connecting a Branch Head or Tail