Overview
EN ISO 23243:2020 - Non-destructive testing - Ultrasonic testing with arrays - Vocabulary is an ISO/CEN vocabulary standard that defines terms used for ultrasonic array inspection techniques. It covers terminology for phased array technology and advanced array-based signal processing such as full-matrix capture (FMC) and the total focusing method (TFM). The document clarifies names and definitions for probes, array geometry, beam concepts and testing techniques to ensure consistent communication across NDT (non-destructive testing) practice, manufacturing and standards work.
Key topics
- Scope and purpose
- Establishes standardized terms for ultrasonic testing with arrays (phased arrays and matrix arrays).
- No normative references - focused on definitions rather than prescriptive requirements.
- Probe and array terminology
- Definitions for array, array element, array probe, linear (1‑D) arrays, 2‑D matrix arrays, annular, convex/concave and sparse arrays.
- Geometrical descriptors: element width/length, pitch, space between elements, primary/secondary axis.
- Beam and sound-field terms
- Main lobe, side lobe, grating lobe, natural refracted beam angle and related beam-direction concepts.
- Apertures and source concepts
- Active aperture, elementary aperture, virtual probe, virtual source aperture (VSA) and sensitivity curve of an array.
- Testing techniques and signal processing
- Vocabulary covering phased array operation, steering/focusing concepts, and advanced FMC/TFM signal-processing terminology.
- Structure
- Organized into terms related to sound, test equipment (probes and instruments) and testing methodology (techniques, signals, presentation, evaluation).
Applications and users
- Primary users
- NDT engineers and ultrasonic technicians implementing or specifying array-based ultrasonic inspections.
- Manufacturers of ultrasonic probes, phased-array instruments and signal-processing software.
- Technical authors, trainers and certification bodies producing procedures and education materials.
- Practical value
- Promotes consistent, unambiguous language in inspection procedures, reports, procurement specifications and international collaboration.
- Supports adoption and correct interpretation of FMC/TFM and phased-array inspections in industries such as oil & gas, power generation, aerospace, and fabrication quality control.
Related standards
- ISO 5577 - General NDT terminology (general terms referenced by this document).
- ISO 18563-3 - Related phased-array terminology (source for some definitions).
- EN 16018:2011 - Superseded by EN ISO 23243:2020.
Using EN ISO 23243:2020 ensures consistent vocabulary for ultrasonic array testing, improving clarity in procedures, training, equipment specifications and cross-border regulatory compliance.
