Creating one weld-neck flange in AutoCAD is a manageable modelling task. Repeating the same sequence for different nominal pipe sizes, pressure classes, pipe schedules and facing types is where time and inconsistency begin to accumulate.
The free VoxelStudio Flange Generator automates this workflow. Version 1.3 lets you prepare a single flange or select multiple flange configurations in Microsoft Excel, then generates a separate AutoCAD .scr file for each selected flange.
Download the free AutoCAD weld neck flange generator. No account or email verification is required.
Four parameters for each selected flange
Each flange configuration uses four inputs:
- Nominal Pipe Size (NPS)
- Pressure class
- Pipe schedule
- Raised Face (RF) or Ring Type Joint (RTJ) facing
After one or more configurations are selected, the Excel VBA logic checks the available data and creates a separate AutoCAD script for each flange. You run the required .scr files in AutoCAD, choose the insertion points and review the generated 3D solids.
The complete workflow
Step 1 — Select one or many flange configurations
Open the workbook and select the required combinations of NPS, pressure class, pipe schedule and facing type. The available combinations are controlled by the dimensional dataset included in the workbook.
Step 2 — Generate the .scr file set
The VBA procedure processes every selected configuration and creates a separate AutoCAD script for each flange. Built-in checks help identify missing data and internal inconsistencies before the model-generation stage.
Step 3 — Run the required scripts in AutoCAD
Open a compatible desktop version of AutoCAD and run the generated .scr files. The workflow allows you to choose an insertion point for each flange instead of forcing every model to be created at a fixed coordinate.
Step 4 — Inspect the conceptual 3D models
AutoCAD executes the scripted modelling operations and creates the weld-neck flanges as 3D solids. The resulting models can then be viewed and checked as part of a conceptual or educational CAD workflow.
What the tool automates
The generator is designed to reduce repetitive CAD work. It:
- combines NPS, pressure class, pipe schedule and facing selections in one Excel interface;
- supports a single selected flange or multiple selected flange configurations;
- creates a separate AutoCAD
.scrfile for every selected flange in one batch; - supports RF and RTJ conceptual geometry;
- allows interactive placement of the flange in AutoCAD;
- performs internal data-completeness and consistency checks;
- provides a practical example of Excel VBA controlling an AutoCAD modelling workflow.
Why use Excel VBA and an AutoCAD script?
Excel is widely available in engineering organisations and is practical for structured parameter selection and validation. AutoCAD .scr files provide a transparent sequence of commands that can be reviewed before use. Combining the two makes it possible to automate a repetitive modelling task without building a large standalone application.
The workbook is supplied as an .xlsm file because VBA macros are required to validate the selections and generate the script. Users should verify the published SHA-256 and follow their organisation's IT and macro-security rules before enabling macros.
Requirements
- Microsoft Excel for Windows with VBA support;
- permission to use macros under your organisation's security policy;
- a compatible desktop installation of AutoCAD capable of running
.scrscripts and 3D solid commands.
AutoCAD LT compatibility has not been verified and is not claimed.
Dimensional references and limitations
The workbook uses nominal dimensional references associated with ASME B16.5 and ASME B36.10. Publicly available information from Wermac and Van Leeuwen was also used as supporting reference material during development. These references do not make the workbook certified, and their mention does not imply endorsement.
The tool is intended to demonstrate and support conceptual 3D modelling. It does not replace current licensed standards, project specifications or professional engineering verification.
Download the free tool
The VoxelStudio Flange Generator is available as a free direct download. No account or email verification is required.
Download the Free AutoCAD Flange Generator
Before running the workbook, review the version, file size and SHA-256 published on the product page. Enable macros only when permitted by your organisation and only after you have verified the downloaded file.
Practical feedback is welcome from piping designers, CAD technicians, mechanical engineers and educators. If you test the workflow, please share which flange combinations you use most often and where the process could be improved.
Contact: [email protected]
Frequently asked questions
Is the VoxelStudio Flange Generator free?
Yes. Version 1.3 is available as a free direct download without account registration.
What does the workbook create?
It creates a separate AutoCAD .scr file for every selected flange configuration. When run in a compatible AutoCAD installation, each script generates a conceptual 3D weld-neck flange model.
Which flange parameters can be selected?
The main selections are NPS, pressure class, pipe schedule and RF or RTJ facing.
Is the output ASME-certified?
No. The tool and its output are intended only for conceptual and educational use. All dimensions and geometry must be independently verified.
Can the model be created without AutoCAD?
The workbook can generate the script, but AutoCAD or another independently verified compatible environment is required to execute it and create the 3D model.
Why does Excel ask about macros?
The workbook uses VBA code to process selections, perform checks and create the AutoCAD script. Follow your organisation's security policy and enable macros only for a file you have verified and trust.
Does the workflow support AutoCAD LT?
AutoCAD LT compatibility has not been verified and is not claimed.