Why is non-destructive testing required for certain welds?

Non-destructive testing is essential for certain welds primarily to ensure compliance with structural integrity. This type of testing allows for the evaluation of the weld without causing any damage to the component. It is crucial in ensuring that the welds can withstand the operational stresses they will be subjected to throughout their service life. By assessing the weld’s quality, including any potential defects such as cracks, inclusions, or voids, non-destructive testing ensures that the weld meets safety and performance standards necessary for the overall structure.

In contrast, while cosmetic flaws may be assessed visually, addressing aesthetic issues is not the focus of non-destructive testing. Checking the color of the weld is also not an indicator of its structural soundness. Similarly, improving the appearance of the weld is not the aim of non-destructive testing; rather, the primary goal is to validate that the weld meets critical safety and strength requirements.