BS EN ISO 25178-2-2022 PDF

Full title and description

STB BS EN ISO 25178-2:2022 — Geometrical product specifications (GPS) — Surface texture: Areal — Part 2: Terms, definitions and surface texture parameters. This document defines the terminology and the areal surface texture parameters used for three‑dimensional (areal) surface texture measurement and evaluation methods, as adopted by the British Standards Institution from the corresponding ISO edition.

Abstract

This standard specifies parameters for the determination and reporting of surface texture when using areal (3D) measurement methods, including definitions of height, spatial, hybrid and feature parameters and their intended interpretation for metrology and engineering applications. It is identical to the international ISO edition and was adopted for national use in 2022.

General information

• Status: Published (national adoption of the ISO document).
• Publication date: ISO edition published 20 December 2021; adopted as BS EN ISO 25178-2 in 2022 (national adoption record 2022).
• Publisher: BSI (British Standards Institution) — national adoption of ISO 25178-2 (original publisher: ISO).
• ICS / categories: 17.040.20 (Properties of surfaces / Surface texture).
• Edition / version: Edition 2 (ISO 25178-2:2021) — adopted nationally in 2022 as BS EN ISO 25178-2:2022.
• Number of pages: ISO edition: 64 pages (national publication page counts can vary by publisher format; some national catalogues list different page counts for their formatted publications).

Scope

The standard defines the terms, definitions and a comprehensive set of areal surface texture parameters to be used when measuring and characterising surface texture with areal (3D) measurement techniques. It supports consistent specification, measurement and reporting of areal surface texture across industries and replaces the earlier 2012 edition.

Key topics and requirements

• Definitions of field and feature terminology used in areal surface texture.
• Formal specification of areal parameters: height, spatial, hybrid, functional and feature parameters for 3D surface description.
• Guidance on parameter application and interpretation for measurement and reporting.
• Alignment with ISO GPS concepts and normative references (e.g., filtration concepts and general GPS models).
• Replacement/supersession of the 2012 edition; includes corrections published in subsequent corrected versions of the ISO text.

Typical use and users

Used by metrologists, quality engineers, R&D and design engineers, instrument manufacturers, and standards bodies in sectors where surface texture affects function or performance (aerospace, automotive, medical devices, tooling and precision manufacturing). It is used for specifying surface requirements, instrument software parameter sets, and interpreting areal measurement results in product acceptance and process control.

Related standards

Part of the ISO 25178 series on areal surface texture (other parts include ISO 25178-1, -3, -6, -70, -600, etc.), and is used together with filtration and measurement method standards (for example ISO 16610 series and other GPS documents). The BS/EN adoption is identical to the ISO text and intended to be used alongside national and industry application documents.

Keywords

Surface texture, areal, 3D surface metrology, GPS, surface parameters, Sa, Sq, Sz, spatial parameters, feature parameters, filtration, metrology, ISO 25178.

FAQ

Q: What is this standard?

A: It is the British adoption (BS EN ISO 25178-2:2022) of ISO 25178-2, the part of the ISO 25178 series that defines terms, definitions and parameters for areal (3D) surface texture. It is identical in technical content to ISO 25178-2:2021.

Q: What does it cover?

A: It covers the vocabulary and the formal definitions of areal surface texture parameters (height, spatial, hybrid, functional and feature parameters), and how those parameters are to be understood and applied when reporting areal measurements.

Q: Who typically uses it?

A: Metrologists, inspection and quality teams, instrument and software manufacturers, design and process engineers in industries where surface topography affects part performance.

Q: Is it current or superseded?

A: The ISO edition (Edition 2) was published in December 2021 and the national adoption as BS EN ISO 25178-2 was made in 2022; it supersedes ISO 25178-2:2012. Check national catalogues or BSI for the precise national publication record and any corrigenda.

Q: Is it part of a series?

A: Yes — it is part of the ISO 25178 series on areal surface texture (multiple parts address indication, operators, instrument characteristics, material measures and other related topics). Use the series as a whole for full specification and measurement workflows.

Q: What are the key keywords?

A: Areal surface texture, surface parameters, GPS, 3D surface metrology, Sa, Sq, Sz, feature parameters, filtration.