Free AutoCAD plastics, process plant and welding marks (DWG): ISO 7000

About ISO 7000

ISO 7000 is the register of graphical symbols for use on equipment: every symbol has a four-digit registration number, a title and a description of what it indicates. It is kept by ISO and is the sister of IEC 60417; some figures appear in both. The five ISO 7000 libraries together hold the registered numbers 0001 to 1299, sorted by industry. Later numbers, and a few figures that could not be drawn reliably, are not included.

The blocks are our own redrawings after the registered figures, not copies of the register, and the library is not certified. The registration number is stored in every block so that you can check a figure against the current edition of the standard, which is the authority.

Frequently asked questions

What is the difference between these marks and diagram symbols?

A diagram symbol (IEC 60617) stands for a component in a circuit. An equipment mark (ISO 7000) is printed on the product to tell the user what a control, a connector or a warning means. Use this library for front panels, labels, user interfaces and manuals.

How large should I draw a mark?

The blocks measure 20 mm on the reference square. The size on the product depends on the viewing distance and on the rules for your type of product, so scale the block to what your product standard or label specification asks for and write the value in SIZE_MM.

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.

Are these the weld symbols used on drawings?

No. These are marks for the controls and displays of welding equipment and process plant, such as current, voltage and gas supply. The weld symbols that go on drawings (joint and weld types) belong to the welding drawing standards.

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.