 The metalworking industry has instituted specifications and codes to guide welders , weld inspectors , engineers , managers , and property owners in proper welding technique , design of welds , how to judge the quality of Welding Procedure Specification , how to judge the skill of the person performing the weld , and how to ensure the quality of a welding job . Methods such as visual inspection , radiography , ultrasonic testing , phased @-@ array ultrasonics , dye penetrant inspection , magnetic particle inspection , or industrial computed tomography can help with detection and analysis of certain defects . 
