TS 3004 EN 22553

TS 3004 EN 22553 is a drafting standard for the symbolic representation of welded, brazed and soldered joints on technical drawings. Its purpose is to give designers, fabricators and inspectors a common drawing language for showing joint type, location and basic intent in a concise and consistent way. The standard addresses the rules for applying those symbols, so the same joint can be read in the same manner across different documents and teams.

Why symbolic representation matters in drawings

Welded joints and brazed or soldered joints belong to related but technically distinct joining processes. Welding generally involves local melting of the base material, whereas brazing and soldering rely on a filler metal flowing into the joint and creating the bond without melting the base metal. On drawings, symbols help distinguish these methods clearly, reducing ambiguity in fabrication instructions. In general technical practice, this makes drawings shorter, more readable and less dependent on free-text explanations.

What this standard covers

The focus of this standard is the application rules for symbolic joint designation on drawings. In other words, it concerns the graphic language used to describe the joint and the disciplined way that language is applied. For technical documentation, such symbols help communicate the essential joint information needed for manufacture and review. The scope presented here is limited to symbolic representation; it does not present itself as a general manufacturing procedure or a test method for joint performance.

This listing refers to a withdrawn TSE edition that is equivalent to EN 22553:1994. In practical engineering documentation, similar symbolic conventions may appear under other related standards, but the technical core of this document is the standardized depiction of welded, brazed and soldered joints on drawings.