TS ISO 13715

TS ISO 13715 is a terminology and indication standard for technical drawings that deals with edges of undefined shape. Because final edge conditions can vary with manufacturing and finishing processes, the standard helps express an intended edge state clearly in the drawing, rather than relying only on a vague geometric expectation.

Common terminology for edge conditions

The vocabulary part of the standard is meant to make the edge condition being discussed unambiguous. In technical drawing, an “edge” is not just a line on paper; it is tied to machining, edge breaking, deburring, chamfering, rounding, or similar finishing actions. This distinction helps design intent be understood consistently by production and inspection personnel. In general technical practice, this kind of terminology reduces ambiguity and supports a common language across design offices, suppliers, and quality control teams.

How undefined edges are indicated in drawings

The other main topic is how states of edges of undefined shape are represented on technical drawings. The purpose is not to define the exact edge geometry in detail, but to communicate the acceptable or required edge condition through a clear drawing indication. This is especially useful in serial production, where the exact size of edge treatment after manufacturing does not need to be individually dimensioned for every part. In practice, such indications support decisions such as leaving an edge non-sharp, specifying a controlled edge condition, or limiting variation to an acceptable range.

This TSE edition is based on ISO 13715 and is used in the context of technical drawing terminology and indication practice. Within the wider technical drawing system, it sits alongside other drawing rules such as the EN ISO 128 series, while TS ISO 13715 focuses specifically on how edges are identified and indicated.