Overview
EN ISO 23864:2021 (ISO 23864:2021) defines the application of automated FMC/TFM (full matrix capture / total focusing method) ultrasonic testing for the non‑destructive testing (NDT) of fusion‑welded joints in metallic materials. The standard covers automated TFM and related technologies for welds in homogeneous, isotropic metals (e.g., low‑carbon alloy steels and common aerospace‑grade aluminium and titanium alloys) with a minimum material thickness of 3.2 mm. It has been adopted by CEN as EN ISO 23864:2021.
Key topics and requirements
- Scope & applicability: FMC/TFM for welded joints in isotropic, homogeneous metallic materials; not intended for strongly anisotropic or highly heterogeneous welds.
- Testing levels & information needs: Defines required information before testing and items to be specified when developing a written test procedure.
- Personnel & equipment: Requirements for operator qualifications, instrumentation, probes, and scanning mechanisms for automated TFM.
- Test preparation: Guidance on defining the test volume, suitable imaging paths, scan increments, geometry considerations, surface preparation, coupling and temperature control.
- Calibration & reference blocks: Use of reference/test blocks and suitable reference reflectors to establish range, sensitivity and verification.
- Procedure verification & equipment checks: Mandatory checks, verification of test setup and routine equipment checks before and during testing.
- Imaging, interpretation & acceptance: How to assess TFM image quality, identify and classify relevant indications, determine location/size (length, amplitude/height) and evaluate results against acceptance criteria.
- Data management: Requirements for data storage and reporting; includes elements for the test report.
- Special cases: Notes on materials such as austenitic welds and informative annexes with typical reference blocks and TFM images.
Practical applications and users
EN ISO 23864:2021 is intended for organizations and professionals deploying automated TFM for weld inspection, including:
- NDT technicians and supervisors implementing FMC/TFM inspections
- Welding engineers and quality managers setting weld acceptance/testing procedures
- Aerospace, automotive, shipbuilding, oil & gas, and power‑generation industries using ultrasonic weld inspection on isotropic materials
- NDT equipment manufacturers and service providers developing TFM solutions and calibration artifacts
Benefits include improved defect imaging, enhanced sensitivity and advanced data recording for traceable weld quality assessments.
Related standards
- ISO 23864:2021 is an international ISO standard adopted by CEN as EN ISO 23864:2021.
- Users should consult companion ISO/EN standards and national implementations covering general ultrasonic testing, weld inspection practices, and personnel qualification for full compliance and harmonized practice.
