The SN EN ISO 21920-1:2022 standard outlines the requirements for indicating surface texture in technical product documentation through graphical symbols, specifically using the profile method. It is published by the International Organization for Standardization (ISO) and applies to industries concerned with geometric product specifications.

Purpose and objectives

The primary objective of the SN EN ISO 21920-1:2022 standard is to provide clear guidelines for the representation of surface texture in technical documentation. By standardizing the graphical symbols used to indicate surface texture, it aims to enhance communication and understanding among manufacturers, designers, and quality assurance professionals. This ensures that all stakeholders have a common understanding of the specifications, thereby minimizing misinterpretations and errors in production processes. Additionally, the standard seeks to support compliance with broader geometric product specifications (GPS) and contributes to improving product quality in various industrial applications.

Scope: who must comply

The SN EN ISO 21920-1:2022 standard applies to a wide range of industries where surface texture is a critical factor in product performance and aesthetics. Typical sectors include:

• Manufacturing: Machinery, automotive, and aerospace industries where precise surface finishes are vital.
• Electronics: Devices requiring specific surface conditions for functionality and reliability.
• Medical Devices: Where surface texture can affect biocompatibility and usability.

Companies involved in technical product specifications (TPS) and those engaged in metrology and measurement practices must comply with these requirements to ensure consistent quality and performance across their products.

How SN EN ISO 21920-1:2022 relates to other standards

The SN EN ISO 21920-1:2022 is part of a broader framework of standards designed to govern geometrical product specifications. It relates closely to:

• ISO 21920-1:2021: The predecessor standard that outlines similar principles but has been updated for clarity and precision.
• SN EN ISO 1302:2002: This standard complements SN EN ISO 21920-1:2022 by providing additional guidelines on symbolic representation of surface texture.
• CEN standards: These European standards also focus on the harmonization of technical documentation practices across various industries.

Revision history and current status

The most recent revision of the SN EN ISO 21920-1:2022 standard was published by the ISO in 2022. This revision includes updates that enhance the clarity and applicability of graphical symbols used to indicate surface texture, addressing feedback from industry stakeholders. Key changes involve improved definitions and examples that help users better understand how to implement the standard in their technical product documentation.