Nondestructive testing or Non-destructive testing is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage
NDT-A Future Career Path
What is NDT?
NDT(Non Destructive Testing) is a diverse, exciting and technically emerging
field which continues to grow. People with backgrounds in nondestructive testing
technology find themselves working in a variety of industries done all kinds of
different things. In general, NDT personnel develop and carryout inspections and
measurements on objects. These inspections are performed in a manner such that
no damage is done to the object.
Ten Good Reasons to Consider a Career in NDT:
1.NDT is an exciting and challenging career field.
2.It is a growing career field.
3.It is a high technology field driven by computer technology.
4.The field of NDT is filled with opportunities for career growth and
5.The demand for qualified technicians is high.
6.The pay is good.
7.Education and training is readily available.
8.There are many different types of jobs.
9.There are NDT personnel working in all parts of the country. .
10. The work can be very rewarding.
Where do people in the NDT industry work?
Mostly NDTr’s works In,
Aircraft and Aerospace, Power generation and utilities, Chemical and
Petrochemical, Bridge and Building fabrication / erection, Independent testing
laboratories, Electronics and Microelectronics, Defense and Military (Civil and
Enlisted), General manufacturing companies, Historical renovation, Infrastructure
construction and maintenance, Automotive, Rail, Marine, Large ship construction,
What do people in NDT do?
Contractors/Business owners: Provide consulting and inspection services
that are mandated by insurance companies as well as local, state and federal
enforcement agencies. In addition, provide quality control services to
companies that may not have the resources or trained personnel to perform
Technicians: Perform, monitor, witness or evaluate inspections using a
variety of inspection methods and quality assessment techniques such as
ultrasound examinations, x-ray and gamma radiography imaging, magnetic
particle and liquid penetrant defect detection, a variety of different
electromagnetic inspection methods as well as many others.
Local, State and Federal Inspectors: Commonly employed by city, state and
federal agencies as well as the military to assure that both fabrication and
maintenance inspections are properly conducted in accordance with
Sales and Marketing: Provide technical expertise, services and equipment to
meet quality control needs in a variety of industries.
Engineers: Assist companies in all phases of project development including
design, fabrication and specifying inspection techniques and methods used
to ensure product reliability and longevity.
Research and Development: Professionals constantly working on improving
our inspection methods and techniques as well as new and improved
materials and products utilized in the industry.
Acoustic Emission Testing
Liquid Penetrant Testing
Magnetic Particle Testing
Neutron Radiographic Testing
Vibration Analysis Testing
A) NDT Certification Levels:
NDT personnel are generally certified to several different levels of competence
within each of the NDT methods they are working. The levels are Level I Limited,
Level I , Level II, and Level III.
Level I technicians are only qualified to perform specific calibrations and tests, and
acceptance or rejection determinations allow little or no deviation from the
procedure. Level I technicians are under close supervision and direction of a higher
level tester. The level I position is not the trainee level, but the first level a trainee
reaches upon demonstrating ability in specific tests. Level I Limited personnel are
restricted even more in what they can do. They are usually trained to a specific
procedure and can perform only certain types of inspections on a certain set of
Level II technicians are able to set up and calibrate equipment, conduct the
inspection according to procedures, interpret, evaluate and document results in all
the testing method(s) utilized by the certificate holder. The technician can provide
on the job training for Level I and Level I Limited and act as a supervisor. The
technician can also organize and document the results of the inspection. They must
be familiar with all applicable codes, standards, and other documents that control
the NDT method being utilized.
Level III technicians are capable of establishing techniques and procedures;
interpreting codes, standards, and specifications; and designating the particular
nondestructive testing methods, techniques, and procedures to be used. They must
also have knowledge of materials, fabrication, and product technology. Level III
technicians are responsible for training and examining Level I and Level II's.
Usually Level III technicians are in administration, supervision, or management
positions, or are owners of a testing laboratory. Some Level III technicians also
B) Certification Requirements:
There are a number of organizations that have produced documents that
recommended or specify the minimum qualifications for certification. The
following is a partial list of documents pertaining to the certification of NDT
personnel in the US.
SNT-TC-1A, The American Society for Nondestructive Testing,
Recommended Practice, Personnel Qualification and Certification in
ATA-105 Aviation Transport Association, Guidelines for Training and
Qualifying Personnel in Nondestructive Testing Methods.
AIA-NAS-410, Aerospace Industries Association, National Aerospace
Standard, NAS Certification and Qualification of Nondestructive Test
ISO 9712, International Organization for Standards, Nondestructive testing ,
Qualification and certification of personnel.
C) Certification Examinations:
Once the education, training and work experience requirements have been
met and documented, a certification examination must be taken. The
examination process actually includes several exams. For certification to
Levels I and II a general, a specific, and a practical, exam must be completed
with a passing grade of 70 percent for each exam and a composite grade of
80 percent (determined by averaging the results of the three exams). The
Level III exam process includes completion of a basic, a method, and
a specific examination with a passing grade of 70 percent for each exam and
a composite grade of 80 percent. Level I and II exams must be administered
by an NDT Level III and this is often done within a particular company.
Level I, II and III exams can also be taken through a central agency such as
ASNT. Central certification provides technicians with documentation of
qualification that is recognized nationally.
Links for Career in NDT
1)NDT Resource Center: http://www.ndt-ed.org/index_flash.htm
2)American Society Of Non Destructive Testing: https://www.asnt.org/
Nayan T Kadam
(RIT COE, Sangli)