TS 88-20 ISO 128-20:2000/T1 (Numara tadili , TS 88-20 EN ISO 128-20)

TS 88-20 ISO 128-20:2000/T1 (Numara tadili , TS 88-20 EN ISO 128-20): TS 88-20 EN ISO 128-20 is the standard for basic conventions governing lines in technical drawings. It addresses the line-based language that makes drawings readable and consistent, helping distinguish visible edges, auxiliary features, centre lines and other graphical elements used in engineering representation. This listing reflects the document identifier change associated with TS 88-20 ISO 128-20/T1, and the edition is shown as withdrawn.

Why line conventions matter in technical drawing

Technical drawing relies on a shared visual code so geometry can be communicated without lengthy textual explanation. Lines are one of the most important parts of that code: different line types and line weights help identify what is physically present, what is hidden, what is an axis or centre feature, and what serves as construction or reference information. In general technical practice, this separation supports consistent interpretation by designers, manufacturers, inspectors and document users.

What this part covers in general terms

From the title and scope information, this part provides the basic rules for lines within the broader system of technical drawing presentation principles. Standards of this kind organise common conventions so drawings can be read in a similar way across disciplines and organisations. The focus is not on a single product, but on the underlying structure of graphical communication in engineering drawings.

• Distinguishing line types to improve visual clarity
• Avoiding confusion between visible edges and symbolic or reference information
• Supporting shared readability and consistency in drawings
• Focusing, as Part 20, on the core rules for lines within the technical drawing presentation family