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5 Creating and Using Routing Points
Routing points are points through which a branch will pass. The user can define the coordinates of a point and the direction in which a branch arrives at and leaves a point.
The user can add as many routing points as required. They must create routing points at the correct position in the sequence of constraints.
Delete the previously added VOLM Reserved_Space from ZONE 311-EQUIP, Move EQUI PMP-2 500mm to Port (Y=500) then delete the Branch elements members from the pipes P1 and P2. Auto route the two pipelines P1 and P2 once again and add a valve at the tail working point on both pipelines and auto route once again.
5.1 Creating a Routing Point
The users will now add a routing point to the pipe P2. The routing point will ensure that Router routes the pipe so that it is parallel with pipe P2.
Add the pipes P1 and P2 to the Router form. Select the branch /P2/B1, then click the Branch
Detail button. The Branch Detail
form is now displayed, from the pull down menu select Create > Routing Point…
The Create Routing Point form is displayed. The user can simply enter the coordinates on the Create Routing Point form or use the options on the menu, which are similar to that of the AVEVA Marine positioning control options.
Positioning Control is covered in the AVEVA Marine Outfitting Foundations (TM-2201) Guide For this example, the position of routing point will be specified relative to an existing component. The user can only position routing points after positionable or locked components.From the Create Routing Point form pull down menu, select Cursor >
Element, then pick Elbow 3 of the pipe /P1/B1, as shown in the
following illustration.
Router creates a routing point at the position of the elbow.
The user will now move the routing point so that it is 1000 mm Forward of the Elbow. From the Create Routing Point form, select Move > Distance…. The Move Point form is displayed. Enter X (Forward) in the Direction field. Enter 1000.0 mm in the Distance field. Click the Apply button to confirm the move, then click
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The user can lock the point at the specified positions using the Lock buttons on the Create Routing Point form, if required. To ensure that pipe P2 travels parallel with pipe P1, the direction will be define in which pipe /P2 arrives at and leaves the routing point. In AVEVA Marine Design, the arrive direction should point to the Head, and the leave to the Tail.From the Create Routing Point form,
Select the Arrive / Leave radio button. Enter -Y (Port) in the Arrive direction field and Y (Stbd) in the Leave direction field.
Ensure that the After option pull down list is set to Head W-P
When the user clicks the OK button Router creates the routing point at the position. This can be seen in the Branch Detail form.
Route Pipe P2 again using Router and the pipe will be routed through the routing point.
By specifying a different arrive and leave direction, the user will cause a bend or elbow to be inserted at the position of the routing point. If a change of direction is not required, select the Through Direction and specify the required direction of the pipe at that point. If the user leaves the direction unset, Router will select the best direction to minimise the number of bends or elbows used.
5.2 Using DATUMs as Routing Points
There is an option on the Create Routing Point form which allows the user to use an existing DATUM point as a routing point. Two branches should not use the same Datum point as a constraint since they would then clash. If it is required to use a Datum where two branches meet, just one of the branches should have the point as a constraint. i.e., Branch /P1/B1 ends at a Battery Limit and Branch P2/B1 connects to its Tail. Branch /P1/B1 should have the Datum as the last constraint and a Free Tail. The Head of Branch /P2/B1 will be positioned at the Tail of /P1/B1.
In the following example a Datum called /P2-DATUM has been created.
Using the Design Explorer navigate to the ZONE 311-PIPE, then using the Command Window key in New DATUM /P2-DATUM and then change the position attribute by keying in Position X 124150mm -Y 6025mm Z 7788mm
Firstly create a routing point again by selecting Create > Routing
Point, then Click the Use Datums radio button, now from the Datums
pull down section select the newly created datum. Key in the Arrive Y, Leave –Y and then click the OK button.
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5.3 Moving a Routing Point
The user can modify the position of a routing point, at any time.
From the Router form, select the branch to be modified. Click the Branch Detail button. The Branch Detail form is displayed. Select the routing point to be modified from the Components/Constraints list, select Point 2 and then select Modify > Constraint. The Modify Routing Point form is displayed.
Select one of the following options, depending on the type of modification you want to make.
Move > Distance… is usedto move a routing point a distance in a
specified direction either from the current location, or relative to another element which can be identify using the cursor or another method.
Move > Towards… is used to move the point a specified distance
towards another element, which can be identify using the cursor, by specifying a named element or, which may be the head, tail or, the next element in the branch.