Weld quality acceptance criteria can originate from a number of sources. The welding fabrication drawing or blueprint provides weld sizes and other welding dimensional requirements such as length and location. These dimensional requirements are established through design calculations or are taken from proven designs that meet the performance requirements of the welded connection. The number of acceptable and unacceptable weld discontinuities for welding inspection usually is obtained from welding codes and standards. Welding codes and standards have been developed for many types of welding fabrication applications. It is important to choose a welding standard intended for use within the particular industry or application in which you are involved. | 