In order to promote the engineering application of PAUT technology in ferrite steel thin-plate butt welds of nuclear power plant, this paper compared and analyzed the major requirements of the domestic and foreign common PAUT standards which are applicable to ferrite steel thin-plate butt welds, ISO 13588—2019, DL/T 1718—2017, and NB/T 47013.15—2021 are more suitable as reference standards for phased array ultrasonic testing of thin-plate butt welds in nuclear power plants. The application of phased array ultrasonic testing of ferritic steel thin-plate butt welds in nuclear power plants can refer to the requirements of NB/T 47013.3—2015 for testing sensitivity and acceptance standards. This conclusion can provide reference for the engineering application of phased array ultrasonic testing technology for ferrite steel thin-plate butt welds of nuclear plant.
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