Simulation-aided UT weld inspection for improving integrity during pipe manufacture

Computational simulations and reliability analysis were used to optimize an automated ultrasonic system used in pipe inspections in a manufacture plant in operation. Through the application of these tools the quality of the final product could be improved from more efficiency inspections. The main purpose was to establish the influence of each variable involved in the capacity of the ultrasonic system in detecting flaws. Tests were conducted considering a calibration API X65 steel pipe in which fitted reflectors were inserted artificially according to the DNV-OS-F101 standard. Experimental variables such as index, probe angle and gate position showed an important effect on the efficiency of the system and statistical analyses proved to be a powerful tool to validate the simulated and experimental results.