PSI - Issue 72

Lazar Jeremić et al. / Procedia Structural Integrity 72 (2025) 91–96

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PAUT inspection scan was performed in the clockwise direction, according to Figure 5a. After previously described calibration, a PAUT inspection of the critical welded joint was performed and no indications were detected, as can be seen in Figure 5b.

a)

b)

Figure 5. a) PAUT inspection scan direction b) inspection results of the fillet weld shell-bottom, no indications

Following the PAUT inspection, 3D scanning of tanks was performed. 3D scanning of pressure equipment represents one of the state-of-the-art methods used in assessing the integrity of pressure equipment, by determining any geometrical deviations and their potential influence on stress concentrations. Hence, the goal of this analysis was to determine the deformations of tank dimensions. As for the used equipment, 3D scanning camera Trimble X7 with a high-speed 3D laser scanner is shown in Figure 6. The results and application of the 3D scan of the tank are shown in Figure 7, where deformations of the shell of the tank were within normal limits, according to the API 653 standard. Tolerance was 57 mm (top), 19 mm (bottom), 300 mm (height shell-to-bottom weld).

Figure 6. Trimble X7 is a high-speed 3D laser scanner

Figure7. 3D scan of the tank shell