Abstract: It is difficult to implement the regular nondestructive testing methods for the in-service petrochemical equipment and pipelines with placing nozzle joint with reinforcing plate (branch connection joint). Aiming at this status quo, the simulation process of phased array ultrasonic testing is adopted to analyze and study such welded joints. And the developed testing process is verified on the simulation test block. The results indicate that the detection effect is good. This process provides a new technical means for the detection of fillet joints of placing nozzle with reinforcing plate.

Key words: placing nozzle with reinforcing plate, branch connection joint, phased array ultrasonic testing, simulation analysis