A cryogenic piping system was found to have a numerous instances of weld misalignment of circumferential butt welds joining sections of the piping system. Becht was asked to evaluate the effect of such misalignment and if repairs were required. The photo shows a typical cross section through the pipe showing the misalignment. Becht evaluated the misalignment using the methods of API 579 Fitness for Service that address weld misalignment and recommended where repairs were required. In a similar case on a larger diameter chilled water system Becht used its affiliated company Sonomatic to conduct a UT inspection to define the misalignment. Since internal inspection was not feasible, a special UT setup was used to conduct a 360 degree scan from the outside diameter of the pipe. A similar API 579 evaluation based on the UT data was used to determine which welds required repair.