Phased Array and TOFD in Lieu of RT Fabrication （相控阵和TOFD代替RT制造）.pdf

Phased array and TOFd in Lieu OF rT FabricaTiOn and in-service auThOr Norbert Trimborn Strategic Business Leader Advanced NDT Phased array and TOFd in Lieu OF rT FabricaTiOn and in-service absTracT This paper will discuss the replacement of Radiography by Phased Array (PA) and Time of Flight Diffraction (TOFD). Information will be given about the inspection requirements for pre-service and in-service inspections. Based on these requirements, SGS has developed a PA inspection system for the inspection of boiler tube welds. The advantages and disadvantages of this system will be discussed by giving information about general advantages, combined with an overview about the differences in detection and sizing of different type of defects. a s the restrictions in the use of factor when using the advanced detected in such an inspection, the Industrial Radiography (RT) has techniques, there can be huge savings remaining life time of a component must increased over the years, the need for associated preventing the disruption of be calculated. This remaining life time alternative weld inspections methods works within the area. In addition, the calculation is the main reason for this and techniques such as Time of Flight speed of PA and TOFD shortens overall type of inspection, as it is not intended Diffraction (TOFD) and Phased Array (PA) inspection time and also eliminates the for the detection weld defects unreported has become more evident. lost time associated with RT. An inherent during the initial NDT inspection. Generally, new developments in factor of using a more accurate Pre-service inspection requires inspection technique is the higher repair Non-Destructive Testing (