I have done nondestructive testing or magnetic particle testing for dry steel pipes. Now the company has passed the second-class certificate. I want to take the third grade exam. If you know, please let me know. Thank you! Look at your education. If you are a nondestructive testing major, you can apply for level 3 in 3 years. If you are an undergraduate, you can apply for level 3 in 4 years. Those with lower academic qualifications will be sentenced to 8 years. If you take the third-level magnetic particle examination, you must also have the second-level certificate of X-ray or ultrasonic. Moreover, those who apply for Level 3 must have their own papers. The examination subjects are about 6 subjects, and there is an oral test, but I heard that the oral test will be cancelled.