This part of NB/T 47013 specifies radiographic testing, ultrasonic testing, magnetic particle testing, penetrant testing, eddy current testing, leakage testing, vis al testing, acoustic emis ion testing, diffraction time-difference ultrasonic testing, X-ray digital imaging testing, magnetic flux leakage testing General requirements and usage principles for non-destructive testing methods such as pulse eddy current testing and pulse eddy current testing. This section applies to non-destructive testing of pressure-bearing equipment made of metal materials in production and in use.