NDT Training Services by NDT Consulting Group Inc. Level III Instructors

Liquid Penetrant Course Outline

A typical Liquid Penetrant Testing course outline.  Courses are modified to meet your needs.


  1. Introduction
    1. Brief history of nondestructive testing and liquid penetrant testing
    2. Purpose of liquid penetrant testing
    3. Basic principles of liquid penetrant testing
    4. Types of liquid penetrants commercially available
    5. Method of personnel qualification
  2. Liquid Penetrant Processing
    1. Preparation of parts
    2. Adequate lighting
    3. Application of penetrant to parts
    4. Removal of surface penetrant
    5. Developer application and drying
    6. Inspection and evaluation
    7. Postcleaning
  3. Various Penetrant Testing Methods
    1. Current ASTM and ASME standard methods - ASTM specifications
    2. Characteristics of each method
    3. General applications of each method
  4. Liquid Penetrant Testing Equipment
    1. Liquid penetrant testing units
    2. Lighting equipment and light meters
    3. Materials for liquid penetrant testing
    4. Precautions in liquid penetrant inspection
  5. Selection of the Appropriate Penetrant Testing
    1. Advantages of various methods
    2. Disadvantages of various methods
  1. Inspection and Evaluation of Indications
    1. Discontinuities inherent in various materials
    2. Reason for indications
    3. Appearance of indications
    4. Time for indications to appear
    5. Effects of temperature and lighting (white to UV)
    6. Effects of metal smearing operations (shot peening, machining, ect.)
    7. Indications from cracks
  1. i.    Cracks occurring during solidification
  2. ii.    Cracks occurring during processing
  3. iii.    Cracks occurring during service
  4. i.    Forgings
  5. ii.    Castings
  6. iii.    Plate
  7. iv.    Welds
  8. v.    Extrusions
  9. i.    True indications
  10. ii.    False indications
  11. iii.    Relevant indications
  12. iv.    Nonrelevant indications
    1. Indications from porosity
    2. Indications from specific material forms
    1. Evaluation of indications
  1. Process Control
    1. Controlling process variables
    2. Testing and maintenance materials
  2. Inspection Procedures and Standards