NA 152

DIN Standards Committee Technical Fundamentals


Technical product documentation (TPD) - General principles of representation - Part 2: Basic conventions for lines


This document establishes the types of lines used in technical drawings (e.g. diagrams, plans or maps), their designations and their configurations, as well as general rules for the draughting of lines. In addition, this document specifies general rules for the representation of leader and reference lines and their components as well as for the arrangement of instructions on or at leader lines in technical documents. Annexes have been provided for specific information on mechanical, construction and shipbuilding technical drawings. For the purposes of this document the term "technical drawing" is interpreted in the broadest possible sense encompassing the total package of documentation specifying the product (workpiece, subassembly, assembly).





Planned document number

DIN EN ISO 128-2

Project number


Responsible national committee

NA 152-06-05 AA - Technical product documentation 

Responsible international committee

ISO/TC 10/WG 19 - Harmonization ISO 129 and ISO 128 series 

previous edition(s)

Technical product documentation (TPD) - General principles of representation - Part 2: Basic conventions for lines (ISO 128-2:2020); German version EN ISO 128-2:2020

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