Which testing method is typically used to ensure the integrity of welds after completion?

Non-destructive testing is commonly employed to evaluate the integrity of welds without damaging the welds or the surrounding materials. This method allows for the detection of internal and external flaws such as cracks, voids, or inclusions that may compromise the weld’s performance. Techniques like ultrasonic testing, radiographic testing, magnetic particle testing, and dye penetrant testing fall under this category. The advantage of non-destructive testing is that it enables the assessment of weld quality while allowing the component to remain in service, making it ideal for quality assurance in critical applications.

In contrast, destructive testing involves testing methods that require the material to be destroyed to evaluate its properties. Although this can provide valuable information about the weld's strength and ductility, it is not practical for finished components as it renders them unusable. Visual inspection is an essential preliminary method, providing initial insights into obvious surface defects, but it does not replace the detailed assessments offered by non-destructive testing techniques. Roughness testing focuses on the surface texture and may not address structural integrity, making it less relevant for ensuring weld quality.