TS 7307 EN 24063

TS 7307 EN 24063 is a withdrawn standard for technical drawings that concerns the naming of welding, brazing, soldering and braze welding processes and the use of reference numbers in symbolic representation. In drawing practice, a consistent process designation helps readers identify the intended joining method quickly and reduces ambiguity across design, manufacturing and inspection documentation.

How the process nomenclature is used

The standard addresses a nomenclature with reference numbers for welding and allied processes. In general technical terms, welding joins metals by fusion or by a closely related joining mechanism, while brazing and soldering rely on a filler metal that melts and flows into the joint at different temperature ranges. Braze welding sits between these families in practical shop usage. Distinguishing these terms matters because the selected process affects joint design, heat input, filler material choice and the way the operation is communicated on a drawing.

Why reference numbers matter on drawings

Reference numbers provide a compact, standardized way to encode a process on a technical drawing. This is especially useful when the same drawing must be read by designers, welders, production planners and quality personnel. Rather than relying on long free-text notes, the symbolic system supports clearer communication and more consistent interpretation of joining instructions in engineering documentation.

• Scope: nomenclature and reference numbers for welding and allied joining processes
• Application: symbolic representation on technical drawings
• Technical focus: joining of metals by welding, brazing, soldering and braze welding
• Document type: withdrawn standard