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Industrial and environmental inspection, vendor inspection, technical assistance, non-destructive testing (NDT) and technical staffing for all type of industries.
Multidisciplinary laboratories.Testing and engineering for product development. Conformity testing and product certification. SYSTEMS CERTIFICATION.
Statutory vehicle inspection services and emission & gas testing solutions worldwide.
Design, engineering, testing and homologation services for the automotive industry worldwide.
Corrosion-resistant alloy (CRA) inspections involve the application of ultrasonic inspection (UT) techniques to inspect welds that are austenitic in nature. The UT inspection of austenitic welds differs greatly from inspection of low-alloy carbon steel welds. The main difference is that welds associated with CRA materials are generally found to have a grain structure that is coarser in nature than that of mild steel. The combination of a coarse grain structure and the anisotropic nature of CRA weld-filler materials tends to affect ultrasonic-wave propagation by way of sound attenuation. This can potentially result in weld defects going undetected. In order to minimise this issue, the probes employed make use of angled longitudinal waves/creep waves rather than the conventional shear-wave approach that is generally used for mild-steel weld inspection. These probes are referred to as transmit and receive longitudinal (TRL) probes and are used widely in the inspection of coarse-grained materials as they give a better signal-to-noise ratio than conventional probes.