TS 3004

TS 3004 is a standard that defines the rules for representing welds symbolically on technical drawings, providing a common graphical language for welding information. In practical engineering documentation, this matters because a drawing must convey not only the presence of a weld, but also the intended weld form and its placement in a compact, unambiguous way.

How welding symbols work in engineering drawings

In general technical practice, welding symbols replace long written instructions with a structured graphic system. That system commonly uses a reference line, an arrow line, a basic symbol and supplementary indications to identify the joint type and the way it should be read. The technical value of such a convention is consistency: design, fabrication and inspection teams can interpret the same weld requirement from the same drawing language. TS 3004 covers the rules for this symbolic representation on drawings, so its focus is the notation itself rather than the design of the weld joint.

Why this document matters in fabrication workflows

The standard is identified as equivalent to ISO 2553:1984, placing it within the widely used family of welding-symbol conventions. In real-world fabrication, standardised symbols help prevent confusion between different weld types and reduce the need for lengthy notes on every detail of the joint. As a drawing standard, TS 3004 supports technical communication across drafting, production and quality functions by making welding information concise and consistently readable.

• It addresses the symbolic depiction of welds on technical drawings.
• It focuses on drawing notation rather than weld design itself.
• It supports consistent interpretation of welding information across technical teams.
• It was issued as an equivalent national standard to ISO 2553:1984.