随着TOFD检测技术越发成熟，国内相关技术培训的深入，已经有越来越多

 As the TOFD inspection technology becomes more mature and the relevant domestic technical training deepens, more and more non-destructive inspection units have applied for TOFD inspection qualification. Since spherical tanks are mostly thick-walled in the manufacturing process, it is difficult to detect by other methods. Especially in recent years, the use of ray sources is prohibited (this item has been deleted from the regulations); TOFD has the advantages of recordability, high detection efficiency, and high sensitivity in the detection of buried defects, and it is increasingly recognized by users and supervisory inspection units. In the periodic inspection of spherical tanks, the defects verified by TOFD technology are used and through the analysis of the defect map, it is believed that the detection of dangerous defects in spherical tanks is easy to be missed by conventional detection methods, and the TOFD detection effect is better.

 With the more mature TOFD testing technology, the depth of domestic related technical training, more and more non-destructive testing units have applied for TOFD testing qualifications. Since the ball cans are mostly thick walls in the manufacturing process, it is difficult to detect by other methods. Especially in recent years, the use of radiation sources is prohibited (this item has been removed in the procedure), TOFD in the detection of buried defects has the advantages of recordable, high detection efficiency, high sensitivity, more and more users and supervision and inspection units recognized. The defects verified by TOFD technology are used in the regular inspection of the ball tank, and through the analysis of the defect map, it is considered that the dangerous defects of the ball tank are detected, the conventional detection method is easy to leak, and the tofD detection effect is better.

With the maturity of TOFD testing technology and the deepening of domestic related technical training, more and more nondestructive testing units have applied for TOFD testing qualification. Due to the thick wall of spherical tank in the manufacturing process, it is difficult to detect it by other methods. Especially in recent years, ray sources are forbidden to be used (this item has been deleted in the regulations); TOFD has the advantages of recordability, high detection efficiency and high sensitivity in the detection of buried defects, which has been more and more recognized by users and supervision and inspection units. In the periodic inspection of spherical tank, the defects verified by TOFD technology are applied. Through the analysis of defect spectrum, it is considered that the conventional inspection method is easy to miss the inspection of dangerous defects of spherical tank, and TOFD detection is better.<br>