Weld defects can be detected by one of the following methods. Non-destructive tests: Welding is checked by destroying the welded sample to ensure its strength and durability, and used before starting the manufacturing process in order to set all the requirements and standards for welding required and to ensure its quality before implementation and manufacture. Non-destructive tests (NON DESTRUCTIVE TESTING): That is, examining equipment without causing any damage to it through different methods and techniques.