About Weld Symbols

Weld Symbols is a free visual reference for welding symbols, joint types, tolerances and threads.

It brings together diagrams, tables and practical explanations to help welders, engineers, designers and students understand technical drawings. The reference is available in 14 languages and covers ISO and US standards, including ISO 2553 and AWS A2.4.

This site is an independent educational resource, not an official standards publication. Always check the applicable standard, drawing requirements and project specifications before fabrication or inspection.