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球形贮罐组焊焊缝采用γ射线照相目前已经非常普遍，由于γ射线照相具有可一次全景曝光、工作效率高、劳动强度和成本低等特点，其应用比例呈上升趋势。例如济南地区１９９８年近２０台球罐现场组焊焊缝射线探伤全部采用了γ射线源，近年来对γ源，γ射线探伤机的研究投入较多
The use of γ-ray photography of spherical tank welding seam welding seam is very common at present. The application ratio of γ-ray radiography has a rising trend due to its characteristics of a panoramic exposure, high working efficiency, low labor intensity and low cost. For example, in Jinan in 1998 nearly 20 sets of tank welding spot weld all the γ-ray source used in recent years, γ-ray source γ-ray flaw detection machine more investment