Abstract: By taking the manually operated penetration testing by using the pressurized canned “solvent removable dye penetrant+solvent suspension imaging” method as an example, this article aims to compare the penetration testing standards in the United States, Europe, and China. It also attempts to expound the differences in test blocks and operating methods used in the verification of penetration testing sensitivity, to sort out and analyze the advantages and limitations, and to provide improvement measures and suggestions for penetrant testing personnel.