Non-destructive testing methods provide data on Process Plant performance and the plant component quality by providing quality inputs from inspections performed during varying operating conditions. This data can be used for assigning maintenance priorities thereby maximizing plant uptime. This is a proactive maintenance methodology and is a known industry best practice. NDT methods give input to the predictive models that further give accurate prediction on extent of the degradation of components and time it would require to fail. In a nutshell, the components can be used to their maximum life without compromising the safety, efficiency and reliability resulting in reduced maintenance costs.