NDT (Non-Destructive Testing)

What Is Non-Destructive Testing (NDT)?

Methods of inspection & information gathering that do not damage or compromise the integrity of a structure (steel/metal) & can be used to inspect structures while they stay in service (except ships with lockout/tag out required).

Why NDT?

Most jobs that involve steel, structural steel constructions, platforms, pipelines or safety concerns start with an inspection. NDT may be used for various types of inspections. Every job is unique because of what a client wants tested. Pipelines, oil rigs, and vessels are required to have inspections every 5 years or be re-inspected after a major named storm. Structures stay in use during NDT (except for ships)—i.e., pipeline production can continue during these inspections.

Where Is NDT Used?

  • Marine Industry (Commercial Diving, Oil Rigs, Ships, Pipeline, Ships Husbandry, Steel Piles, Intake Structures, etc.)
  • Airline/Aerospace Industry
  • Railroad Industry
  • Structural Steel Construction (Buildings, Bridges, etc.)
  • Nuclear Plants/Power Plants
  • Wind Energy/Wind Farms (Offshore & Inland)
  • Topside and Underwater Applications
  • Certifications

American Society for Non-Destructive Testing (ASNT) Certification is the most recognized credential for NDT.  (Source: American Society for Non-Destructive Testing) Every NDT course on DIT’s campus are taught by Level II/III ASNT-certified instructors and graduates of these course can earn Trainee Level I & Level II ASNT certifications for each course.

There’s a Huge Need In All Industries

Level II retiring at 3:1 rate (Currently for every 3 that retire, only 1 new Level II fills the gap)

Level III retiring at 5:1 rate (Currently for every 5 that retire, only 1 new Level III fills the gap)

* These statistics are provided by NDT Resource Center

Lots Of Opportunity (Worldwide!)

Check out NDT Job postings via:




Course Descriptions: 

Magnetic Particle Testing (MT I & II)


Practice plate for designing a Magnetic Particle test.

Magnetic Particle Testing (or Magnaflux Testing-MT) uses magnetic leakage fields (metal particulates dusted onto inspection areas) to detect surface and near-surface cracks and discontinuities, particularly in welds.  Course participants will learn to identify material properties, operate yokes (equipment used to generate magnetic fields), apply correct inspection techniques, and interpret indications according to federal and international specification standards. Participants will practice MT theory in daily, hands-on laboratory applications and skills assessments.

Penetrant Testing/Dye Penetrant (PT I & II)


2-step developers used in Dye Penetrant test.

Penetrant Testing (PT) is used to locate inherent, processing or service discontinuities in nonporous materials. Theoretical aspects of this method will be covered in this course, including history, purpose, types, advantages and limitations of PT.  Participants will learn through demonstrations and practical hands-on laboratory time on both portable and stationary equipment to learn PT materials, processing, testing techniques, indications and reporting methods.

Ultrasonic Testing (UT I &II):

Diver using Cygnus gauge to perform UT.

UT Level I is introductory but comprehensive coverage of ultrasonic theory and hands-on operation of UT instruments for persons with little or no technical background.  Technical sonic (soundwave) principles are applied in laboratory exercises and practice of UT metal thickness testing procedures, including proper recording of test results. Participants will learn applications including precision thickness gauging, flaw detection and evaluation, plus introduction to angle beam and immersion testing.

UT Level II is an advanced, laboratory-intensive course for people who have completed UT Level I.  Practical skills are expanded with applications in weld inspection, bonded structure inspection, discontinuity detection, and immersion techniques. Further detailed training is included on angle beam testing and defect evaluations.

Visual Testing (VT I &II):

This course will cover the theoretical aspects of Visual Testing (VT) methods and includes practice in the techniques, terminology, basic principles, and industry applications of VT. Course participants will learn specific procedures, codes and standards, and processes of improving reliability in visual inspection through the practical use of a variety of visual equipment. Level I/II courses are basic programs for persons with little or no technical background.

Descriptions for the following course are forthcoming. Please contact us for questions:

  • Eddy Current (EC I & II):
  • Radiographic Testing (RT I & II)
  • Radiation Safety (RS)
  • Magnetic Flux Leakage
  • UT Phased Array
  • CWI Preparation
  • Shear Wave