What is Wall Thickness Measurement?

Wall thickness measurement refers to the local measurement of material thickness within a 3D volume. 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 distance-field methods between inner and outer surfaces. Meaningful results only emerge from traceable criteria and defined acceptance limits.

Relevant key metrics

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

Standards and thresholds

Standards: ISO 14405-1:2025, ISO 1101:2017 and VDI/VDE 2630 Part 2.1:2015-06.
Typical thresholds (in practice): Compliance with t_min/t_max per specification; safety-critical minimum wall thickness is evaluated without exception tolerance.
Validity: Thresholds derive from load case, material and design specification.

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 14405-1:2025.
ISO 1101:2017.
VDI/VDE 2630 Part 2.1:2015-06.
Reference date: February 2026.