ASNT IR Level III – Refresher Course (Online)

The ASNT Infrared and Thermal Testing (IR) Level III Refresher Course by NDTWorldwide® is designed for experienced Infrared/Thermography Level II and Level III professionals who are preparing to renew or revalidate their ASNT IR Level III certification. The course focuses on refreshing core technical knowledge and reinforcing Level III responsibilities in a clear, structured, and exam-focused manner.

This refresher program provides a targeted review of key Infrared and Thermal Testing topics, including principles and theory of heat transfer, conduction, convection, radiation, temperature measurement principles, equipment and materials, and infrared testing techniques. Emphasis is placed on understanding the use of thermal imaging systems, noncontact pyrometers, line scanners, heat flux indicators, and their performance limitations in practical inspections.

The course also helps participants remain familiar with thermal data interpretation and evaluation methods, proper selection of infrared testing applications, and essential safety and health requirements for personnel, facilities, and equipment. Through focused revision and practical understanding, candidates strengthen their confidence, technical judgment, and exam readiness, ensuring continued performance as competent and responsible ASNT IR Level III professionals.

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ASNT IR Level III – Refresher Course (Online)

Training Objective

ASNT IR Level III – Refresher Course (Online)

    Principles / Theory

    • Understand the basic principles of heat, temperature, and heat flow.
    • Learn the concepts of conduction, convection, and radiation.
    • Understand temperature measurement principles and thermal behavior of materials.
    • Know how to properly select infrared and thermal testing as an inspection method.

    Equipment / Materials

    • Become familiar with thermal and infrared testing equipment and materials.
    • Understand temperature measurement equipment and heat flux indicators.
    • Learn the performance parameters and limitations of noncontact temperature devices.
    • Understand factors affecting accuracy and reliability of thermal measurements.

    Techniques

    • Learn contact and noncontact temperature measurement techniques.
    • Understand the use of noncontact pyrometers, infrared line scanners, and thermal imaging systems.
    • Apply thermal and infrared techniques for heat flow, friction, fluid flow, and energy investigations.
    • Understand exothermic and endothermic testing applications.

    Interpretation / Evaluation

    • Understand methods for interpreting thermal and infrared data.
    • Learn how environmental conditions and test setup affect thermal images and readings.
    • Evaluate temperature patterns, anomalies, and heat flow characteristics.
    • Apply evaluation techniques to assess test results and component condition.

    Safety and Health

    • Understand safety responsibilities and authority during infrared and thermal testing.
    • Recognize safety requirements for personnel, clients, and facilities.
    • Learn safe operation of thermal testing equipment.
    • Apply safety practices to prevent hazards related to heat, electrical systems, and equipment use.

Who Should Attend

This ASNT IR Level III – Refresher Course is ideal for professionals seeking certification and technical advancement:

    • Aspiring ASNT IR Level III candidates
    • NDT professionals – Managers, Engineers, Supervisors, Inspectors, Technicians
    • QA/QC & Welding professionals
    • Metallurgists, Mechanical & Production Engineers
    • Asset Integrity & RBI Inspectors
info

Note: No prerequisites to attend the course.
ASNT exam eligibility requires minimum education and experience, as per ASNT published guidelines.
A focused refresher for professionals aiming at ASNT IR Level III success.

ASNT IR Level III – Refresher Course – Syllabus

    Number of Items: 90
    Time for Completion: 2 hours

  1. Principles and Theory
  2. Conduction
  3. Convection
  4. Radiation
  5. The Nature of Heat and Heat Flow
  6. Temperature Measurement Principles
  7. Proper Selection of Thermal/Infrared Testing
  8. Equipment and Materials
  9. Temperature Measurement Equipment
  10. Heat Flux Indicators
  11. Performance Parameters of Noncontact Devices
  12. Techniques
  13. Contact Temperature Indicators
  14. Noncontact Pyrometers
  15. Infrared Line Scanners
  16. Thermal/Infrared Imaging
  17. Heat Flux Indicators
  18. Exothermic or Endothermic Investigations
  19. Friction Investigations
  20. Fluid Flow Investigations
  21. Thermal Resistance (Steady State Heat Flow)
  22. Thermal Capacitance Investigations
  23. Interpretation and Evaluation
  24. Procedures
  25. Safety and Health
  26. Safety Responsibility and Authority
  27. Safety for Personnel
  28. Safety for Client and Facilities
  29. Safety for Testing Equipment

Books to be Studied (Main References)

Document Edition
1. ASNT Level III Study Guide: Thermal/Infrared Testing (IR)
 2nd Edition
2. Nondestructive Testing Handbook: Vol. 4, Thermal and Infrared Testing (IR) 
 4th Edition
3. ASNT Questions & Answers Book: Thermal & Infrared Testing Method (IR)
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ASNT IR Level IIIRefresher Course Schedule

ASNT IR Level III – Refresher Course (Online)

    • Course Dates: 2nd Feb 2026 to 28th Feb 2026 (20 Days)
    • Course Duration: 40 Hours
    • Course Mode: Online (Through Zoom)
    • Class timings: 8:30 PM to 10:30 PM IST

ASNT IR Level III – Refresher Course (Online)

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