What is Joining Inspection?

Joining inspection refers to the CT-based inspection of welded, soldered, bonded or press-fit joints. The method delivers actionable quality data for product release, process optimisation and root-cause analysis.

Scientific background

Methodologically, the procedure relies on standardised workflows covering data acquisition, segmentation, feature extraction and evaluation. Core elements include analysis of bonding surfaces, pore fractions and gap distributions. Meaningful results only emerge from traceable criteria and defined acceptance limits.

Relevant key metrics

Detection limit and misclassification risk for the relevant failure modes.
Repeatability of the evaluation for identical input data.
Relationship between indicators and functional load zones / specifications.

Standards and thresholds

Standards: ISO 17636-2:2022, ISO 15708-3:2025 and ISO 1101:2017 for geometric feature evaluation.
Typical thresholds (in practice): Impermissible joint defects in critical load paths = 0; geometry and position criteria must stay within drawing tolerance.
Validity: The authoritative standard depends on the joining process, material and safety class.

Application in industrial practice

Data-based release decisions during ramp-up and series production.
Early detection of deviations with cause-oriented prioritisation.
Improved customer and supplier communication through objective CT reports.

Sources and reference date

ISO 17636-2:2022 (digital radiographic testing).
ISO 15708-3:2025 (CT operation/interpretation).
ISO 1101:2017 (GPS tolerancing).
Reference date: February 2026.