TS 88-20 EN ISO 128-20 (Eski no: TS 88-20 ISO 128-20)

TS 88-20 EN ISO 128-20 (Eski no: TS 88-20 ISO 128-20): TS 88-20 EN ISO 128-20 sets out the basic conventions for using lines in technical drawings. It addresses the common visual language used across technical documents such as schematic drawings, plans and maps, helping lines convey meaning consistently so that drawings remain clear, readable and technically unambiguous.

Line types and their role in technical communication

In technical drawing, a line is not only a geometric stroke but also an information carrier. Continuous lines, dashed lines, chain lines and related variants are used to represent different functions such as visible edges, hidden features, centre lines, dimensioning or auxiliary indication. At a general level, this standard provides a shared framework for understanding how these line families are classified and designated, which supports consistent interpretation across different technical fields.

General technical context and typical use

The document is concerned with the fundamental presentation rules for lines in technical documents rather than with a discipline-specific design code. That makes it relevant to a broad range of drafting environments, including mechanical, civil and surveying-related drawings, where a consistent line convention is essential for communication. Identified as equivalent to ISO 128-20:1996, it reflects the international technical drawing practice associated with that edition; this TSE listing is withdrawn.