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NDT Testing Personnel Qualification and Certification Standards:

ASNT Recommended Practice No. SNT-TC-1A

National Aerospace Standard NAS-410

ASNT Standard CP-189

ASNT ACCP

ASNT NDT Level III

Military Standard MIL-STD-410E

Air Transport Association Standard ATA - 105

International Standard ISO 9712

Canadian CGSB-48.9712

NAS 410
National Aerospace Standard

For many years, aerospace and defense related military or government contracts required NDT personnel qualifications in accordance with MIL-STD-410E. It was replaced in the 1990’s by NAS 410.

Initially published in May, 1996. Revision 1 was issued in June, 2002; Revision 2 was issued in February, 2003 introducing significant change in the training of Liquid Penetrant Testing and Magnetic Particle Testing personnel. Training for each of these methods was increased to 16 hours each for Level 1 and Level 2 for a total of 32 hours for Level 2 qualification. Additionally, Revision 2 changed the re-certification period for Level 1 and 2 from three (3) years to five (5) years intervals.

NAS 410 Revision 3 (current version) completely revised the standard in March, 2008 and is considered technically equivalent to the European standard EN 4179 entitled Qualification and Approval of Personnel for Non-destructive Testing. Table 1 and Table 2 provide training and experience requirements for Level 1 & 2 personnel.

Table 1 - Minimum Formal Training Hours, Level 1 and 2
Method
Level 1
Level 2 with Level 1 certification
Level 2 without Level 1 certification
Eddy Current (ET)
40
40
80
Liquid Penetrant (PT)
16
16
32
Magnetic Particle (MT)
16
16
32
Radiography (RT)
40
40
80
Ultrasonics (UT)
40
40
80

Table 2 - Minimum Experience Requirements, Level 1 and 2
Method
Level 1 (Trainee experience)
Level 2 with previous Level 1 certification
Level 2 without previous Level 1 certification
Eddy Current (ET)
400
1200
1600
Liquid Penetrant (PT)
130
270
400
Magnetic Particle (MT)
130
400
530
Radiography (RT)
400
1200
1600
Ultrasonics (UT)
400
1200
1600

 

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