NDT and Material Testing
NDT coordination and witnessing
Non-destructive testing that answers the right question: appropriate method, qualified operator, correct technique and the right acceptance criteria.
01What the service involves
QUALITAS TR coordinates non-destructive testing on behalf of buyers: defining methods and extent from the specification, verifying that the NDT company or supplier personnel are qualified to ISO 9712 (or the scheme required), reviewing written procedures and techniques, witnessing tests and reviewing reports and radiographs.
Visual testing is performed by our engineers. PT, MT, UT and RT are performed by the supplier's certified personnel or an independent NDT company. Where the buyer prefers fully independent testing, we arrange it.
02Why buyers need it
NDT results depend on technique. A UT scan with the wrong probe angle may miss lack of sidewall fusion; RT film with poor sensitivity may hide cracks; MT on a painted surface may detect nothing. Witnessing the set-up is as important as reading the result.
Independent review also checks that indications are evaluated against the correct acceptance standard.
03Typical applications
- Welded fabrications and pressure equipment
- Castings and forgings
- Machined critical components
- Rail and automotive safety parts
- Repairs and weld overlays
- In-service and failure investigations
04Methodology
NDT plan
Methods, extent, locations, timing (after PWHT) and acceptance criteria defined.
Qualification check
Operator certificates, level, sector and validity; equipment calibration.
Procedure review
Written procedure and technique sheets checked for the specific geometry.
Witnessing
Set-up, calibration and test performance witnessed; indications evaluated.
Report review
Reports and images reviewed for completeness and correct evaluation.
05Applicable standards and references
Personnel qualification and certification for NDT is defined in ISO 9712. Method standards (for example the ISO 17640 series for UT of welds, ISO 17636 for RT, ISO 17638 for MT and ISO 3452 for PT) and acceptance levels linked to ISO 5817 are named in the specification.
06Deliverables
- NDT plan and extent matrix
- Personnel and equipment verification record
- Witnessing reports
- NDT report review comments
- NDT status summary per item
07Customer benefits
- Reliable NDT results
- Correct technique for each geometry
- Qualified personnel verified
- Fewer disputes about indications
- Complete NDT records