Free EN 1092-1 weld neck flanges for AutoCAD (DWG): type 11, PN10 to PN40

About EN 1092-1 and the dimensions

Flange diameter, bolt circle, bolt holes, raised face, thickness and neck follow the tables of EN 1092-1 for type 11; they agree in two published tables. The thickness does not include the raised face, 2 to 5 mm depending on DN. The neck tapers from the hub diameter to the pipe diameter and ends in a short straight part. Below DN200 the PN10 flange is the PN16 flange.

The blocks are our own drawings, not copies of the standard, and the library is not certified. Dimensions are nominal, without tolerances. Plate flanges (type 01) and blind flanges (type 05) are not included, because the published thickness tables do not agree. Check the dimensions against the edition of EN 1092-1 your project uses.

Frequently asked questions

Are these flanges to EN 1092-1?

Yes. They are type 11 weld neck flanges with a B1 raised face, and the dimensions come from the tables of the standard, which agree in two published tables. They are nominal drawing dimensions, without tolerances.

Why are there no PN10 flanges below DN200?

In EN 1092-1 the PN10 flange is the same as the PN16 flange up to DN150, so use the PN16 block there. PN10 has its own dimensions from DN200.

Can I use the symbols in commercial projects?

Yes. They are free to use and modify in your own projects, including commercial ones. They are provided as is, without warranty.

How do I get a flange list from my drawings?

Export the flange blocks of all drawings to Excel with BlockSync: one row per block with DESIGNATION, pressure rating, material and quantity. Total them with a pivot table to get a flange list.

Can I change a symbol or add attributes?

Yes. Open the DWG, edit a block with BEDIT to change it or add attributes, and save. To update drawings that already contain the block, run ATTSYNC or replace the block. Make a backup first: attribute values can be lost if ATTSYNC is used carelessly.

Where do I find a ready-made set of these symbols for AutoCAD?

AutoCAD itself ships only a small set of sample blocks, so a full symbol set has to come from a library. Download the ZIP on this page and open the DWG: every symbol is a block. Insert one with INSERT (Blocks palette, Libraries tab, then pick the DWG) or drag it from DesignCenter (ADCENTER). You can also download a single symbol on its own.