
Non-Destructive Testing (NDT) – weld-seam and material testing without part damage
Prove the quality of weld seams and components without destroying them – non-destructive testing in-house with Level 2 qualification as part of our EXC3 manufacturing framework in Lorch.
Visual, dye penetrant and magnetic particle testing in-house with qualified inspection personnel.
Carried out by certified personnel – ultrasonic testing (UT) available on a project basis.
Assess surface, near-surface and internal indications without destroying the sample or the part.
NDT as part of the certified system to DIN EN 1090-2 EXC3, EN ISO 3834-2 and DIN EN ISO 9001:2015.
Welding, testing and material traceability from a single source – without an external interface.
What does non-destructive testing mean?
Non-destructive testing (NDT) reveals irregularities in materials and weld seams without damaging the component. The decisive advantage – testing is carried out on the real component that is used later – the sample stays intact and ready for use.
With welded assemblies, it is not only the finished seam that counts, but also the traceable proof of the required quality. Depending on component, material, seam class and customer specification, we accompany production with the appropriate testing methods and document the result.
Our testing methods
We carry out visual, dye penetrant and magnetic particle testing in-house – with inspection personnel qualified to Level 2 to DIN EN ISO 9712. Ultrasonic testing is available in-house on a project basis through certified inspection personnel. This covers the common surface and volume testing methods for steel and welded structures:
Available NDT methods
- Visual testing (VT), dye penetrant testing (PT) and magnetic particle testing (MT) – in-house with Level 2 qualification to DIN EN ISO 9712.
- Ultrasonic testing (UT) – in-house on a project basis through certified inspection personnel.
This allows surface indications, cracks, near-surface irregularities and internal irregularities in suitable components and welded joints to be assessed.
Test scope and documentation are agreed on a project basis according to drawing, standard requirement and customer specification – so quality assurance is not generic but tailored to the respective assembly.
When is non-destructive testing required?
Whenever seam quality must be verifiable or near-surface defects must be reliably ruled out:
- Weld seams of load-bearing steel structures to DIN EN 1090-2 EXC3
- Acceptance-relevant assemblies in pressure vessel and apparatus construction (AD 2000, Pressure Equipment Directive)
- Safety-relevant components for crane, plant and vehicle construction
- Components with a required seam quality to drawing, standard or customer specification
If in doubt, we clarify together which testing method and documentation scope your project requires – and provide the appropriate proof.
Testing and manufacturing from a single source
At Bock, non-destructive testing is not an isolated final step but part of the certified quality framework to DIN EN 1090-2 EXC3, EN ISO 3834-2 and DIN EN ISO 9001:2015. The responsible welding supervision (IWE/EWE) accompanies welding procedure qualification, testing requirements and documentation – welding and testing come together at the same site.
Combined with the material re-stamping certificate to EN 10204, the entire quality and verification chain stays in one place: from the traceable material to the documented seam inspection – one contact, one continuous record.
Non-destructive testing at Bock – your advantages
Tested quality as a documented part of our manufacturing process:
- Level 2 to DIN EN ISO 9712
- VT, PT and MT in-house with qualified inspection personnel – ultrasonic testing on a project basis through certified personnel.
- Tested without part damage
- Assess surface, near-surface and internal indications without destroying the sample or the part.
- Embedded in the EXC3 framework
- NDT as part of the certified quality system to DIN EN 1090-2 EXC3, EN ISO 3834-2 and DIN EN ISO 9001:2015.
- Testing and manufacturing in one place
- Welding, testing and material traceability from a single source – without an external interface.
- NDT from the region
- Certified welding companies and steel fabricators from the Stuttgart area and the DACH region use our in-house NDT – test certificates without an external service provider, straight from our plant in Lorch.
Your project — right from the region
Send us your enquiry for contract manufacturing, structural steel or custom machinery — we'll get back to you promptly.
Request non-destructive testing
Tell us about the component, material, seam class and inspection requirement – we agree the appropriate NDT method and document the result to standard.

