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When using surface crack detection, whether liquid penetrant testing or magnetic particle, you should always consult the relevant specification involved for levels of acceptability and qualifications for equipment and operators. These methods of inspection are specialized and should be carried out by suitably trained and qualified inspection personnel.
The successful welding procedure will incorporate in its requirements the controls necessary to overcome the tendency for crack formation.
A number of discontinuities are associated with the exterior profile or shape of the completed weld. These discontinuities are generally detected through visual inspection of the weld.
As a welding inspector, in order for you to successfully conduct your profession, it is important to understand weld discontinuities. To fully understand weld discontinuities, we must first examine some welding terminology.
When the welding operations involve preheating and/or post-weld heat treatment, it is important that the welding inspector understand these requirements in order to ensure that they are being conducted correctly and in terms of the relevant welding procedure specifications and/or code requirements.