Modelling

Piping

At the model stage, fabrication related features are defined, such as fabricated pipe ends, assignment of bending machines and design checks for fabrication. Additional catalogue components are also provided as part of Pipe Fabrication.

Assign Bending Machine

A default Bending Machine Reference can be defined for a pipe specification and a Bending Machine Reference in the pipe structure can be modified.

Default Bending Machine Reference in Pipe Specification

To specify a default bending machine reference to each pipe specification using AVEVA Catalogue.

Whenever a pipe is created, the BendMacReference attribute is populated with the default value assigned to the piping specification. By default, the BendMacReference attribute is assigned with a valid default bending machine reference from the pipe specification.

Modify Bending Machine Reference in Pipe Models

If a pipe bend Radius is too large and needs to be changed to a smaller bend radius for design reasons, then the BendMacReference attribute for the zone, pipe or branch can be modified to point to another Fabrication Machine World (FMWL), Group (FMGRP) or Machine (FMBEND).

Click CE to identify the currently selected SITE, ZONE, PIPE or BRAN as the currently selected element.

The list of elements displays the Name, element type and BendMacReference attribute value of each element in the selected pipe structure. The user can select one or more elements to modify.

Select the Highlight selected elements check box to highlight the selected table item in the 3D graphical view.

The Assign Bending Machine part of the Assign Bending Machine window allows the user to assign a new bending machine and modify the bend radius of the selected element.


Assign Bending Machine	Select an FMWLD, FMGRP or FMBEND from the drop-down list to assign a BendMacReference attribute value to the selected element.
Modify Bend Radius	Select the check box to modify the bend radius of the selected element by default. Refer to Modify Bend Radius for further information.
Tidy	Select the check box to tidy the BendMacReference attribute value of the selected element by default. Refer to Tidy BendMacReference Element for further information.

Click Apply to assign a new BendMacReference modify the bend radius of the selected element.

Modify Bend Radius

If the Modify Bend radius check box is selected, the bend radius of the selected element is modified by default.

The example below shows the modified bend radius as part of a pipe structure.

Tidy BendMacReference Element

If the Tidy check box is selected, the BendMacReference attribute value of the selected element is tidied by default. If the BendMacReference attribute value of a branch is the same value as the owning pipe, the attribute value is removed from the branch.

The example below shows a pipe and branch with a duplicate BendMacReference attribute value.

When the Tidy check box is selected, the BendMacReference attribute value is removed from the branch.

Details

The Details tab displays a list of change details for the pipework structure, calculated when the bending machine is assigned.

Errors

The Errors tab displays a list of errors for the pipework structure, calculated when the bending machine is assigned.

Bending Error Types

There are three different error types that can be checked for:

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Not enough tube length before/after bend.

There is not enough straight tube length before or after a bend to change the bend radius. An instance can occur when changing a bending machine reference that uses a larger radius value.

The example below shows the effect of enlarging a bend radius on a tube.

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Bending machine cannot handle the outside diameter

The new bending machine reference does not have a suitable bending dimension for the outside diameter of the target pipe.

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BendMacReference is not defined.

The BendMacReference attribute value is not defined for any of BRAN, PIPE and ZONE elements in the pipework structure.

Fabricated Pipe Ends

The Fabricated Pipe Ends window defines a plain, slanted or threaded pipe end.

Create Sniped Ends

Create Sniped Ends with Reference Plane

Create Thread End

Remove Fabricated End

Display Fabricated End

Create Sniped Ends

Specify the angle for the Plain and display a Drawing Note.

By default, the slated angle is 0 which means it is a plain end.

If required, enter a statement in the Drawing Note field, the default is Plain End, the note is displayed on the drawing.

Click Create Sniped Ends, select a pipe end in the 3D graphical view.

The prompt ‘Pick pipe end:’ is displayed.

The Plain fabricated end is added to the pipe and the orientation of the pipe end is displayed.

Specify the angle for the Sniped End and display a Drawing Note.

Enter a value (greater than 0) in the Slanted Angle field to define the angle of the Slanted End in degrees.

If required, enter a statement in the Drawing Note field, the default is Trim pipe end to {deg}, the note is displayed on the drawing.

Note:

{deg} is replaced by the value of the Slanted Angle value in the drawing.

Click Create Sniped Ends. The user must select a pipe end in the 3D graphical view.

The prompt ‘Pick pipe end:’ is displayed.

The sniped fabricated end is added to the pipe and the orientation of the pipe end is displayed.

Create Sniped Ends with Reference Plane

Creates a slanted end by referencing a plane.

Enter a value (greater than 0) in the Sniped Angle field to define the angle of the Sniped End in degrees.

Enter a dimensional value in the Clearance field to define the reference plane clearance.

If required, enter a statement in the Drawing Note field, the default is Trim pipe end to {deg}. The note displays on the drawing.

Note:

{deg} is replaced by the value of the Sniped Angle value in the drawing.

Click Create Sniped Ends with Reference Plane.

The prompt ‘Pick pipe end:’, is displayed then ‘Pick plane:’

The plane is used as the pipe end cutting standard in the 3D graphical view.

The Slated fabricated end is added to the pipe and the orientation of the pipe end is displayed.

Create Thread End

Defines a threaded end for a fabricated pipe end.

Click Create Threaded End. The user must select a pipe end in the 3D graphical view.

The prompt ‘Pick pipe end:’ is displayed.

Select a Threaded Type from the Thread Type drop-down list.

The user can configure the Thread Type, refer to Threaded Ends for further information.

The Threaded End consists of four attributes:

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The Thread information is shown on the drawing.

If a tube has thread information, the build length value starts with '*' as prefix.

The assembly table contains the thread information.

Remove Fabricated End

Deletes the Fabricated End (Sniped or Threaded). The user must select a pipe end in the 3D graphical view.

Display Fabricated End

Displays information for the created Fabricated End.

Modelling Consistency Checks

Pipes that are still being designed can be checked for fabrication readiness. Some of the checks require configurable dimensions or minimum distances. By default, the window is now populated with the details of the CE.

To add pipes to be checked, in the Model Explorer click to select the required pipe. Then select Add CE, the CE is displayed in the Modelling Consistency Check window.

To highlight the pipe to be checked in the 3D graphical view, click to select the Highlight selected elements check box. By default the check box is not selected.

To run modelling consistency checks, click Check, a short description (pass or fail) of the check is displayed on the Results tab.

On the CE tab, a more detailed description of the modelling consistency checks are displayed.

On the Options tab, all of the modelling consistency checks are displayed, by default all the checks are selected.