41. Non - destructive testing - penetrant testing and magnetic particle testing - viewing conditions 42. Non - destructive testing - penetrant testing - part 1 : general principles ; german version en 571 - 1 : 1997 43. Non - destructive testing - penetrant testing - part 4 : equipment iso 3452 - 4 : 1998 ; german version en iso 3452 - 4 : 1998 44. Non - destructive testing - terminology - terms used in penetrant testing iso 12706 : 2000 ; trilingual version en iso 12706 : 2000 45. Non - destructive testing - penetrant testing - part 3 : reference test blocks iso 3452 - 3 : 1998 ; german version en iso 3452 - 3 : 1998 46. Non - destructive testing of welds - penetrant testing of welds - acceptance levels ; german version en 1289 : 1998 a1 : 2002 47. Confirmation method of calibration by visual calibration gauge on magnetic particle and liquid penetrant testing 48. Non - destructive testing - penetrant testing - part 2 : testing of penetrant materials iso 3452 - 2 : 2000 ; german version en iso 3452 - 2 : 2000 49. Non - destructive testing - penetrant testing and magnetic particle testing - viewing conditions iso 3059 : 2001 ; german version en iso 3059 : 2001 50. Non - destructive testing of steel tubes - liquid penetrant testing of seamless and welded steel tubes for the detection of surface imperfections
