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Liquid Penetrant Testing

Lesson 1: Introduction to Liquid Penetrant Testing

Tips before getting started
What to expect in this section?
Visible PT (Practical)#1
Visible PT Practical #2
Fluorescent PT (Practical)
History: Traditional Oil and Whiting Method
Steps to perform Liquid Penetrant Testing (3:41)
Reasons for selecting LPT
Types of Penetrants
What is SNT-TC-1A? (2:43)
Three Levels of Certification (3:52)
Qualification and Certification
The General, Specific and Practical Exams
Vision Tests
Safety Measures to be taken while performing PT
Read Chapter 1
Lesson 1 Quiz

Lesson 2: Liquid Penetrant Processing

Preparing test objects for LPT
Methods of Pre-cleaning the surface to be inspected (2:45)
Pre cleaning processes to avoid
Applying penetrant
Illumination Requirements
Visible PT with Brushing technique
Fluorescent PT with Dipping technique
Flourescent PT with Pouring technique
Take a break
Removal of Excess Surface Penetrant
Another Fluorescent Penetrant Testing Station Demonstration
Developer Application
Interpretation & Evaluation of indications
What are Relevant and Nonrelevant Indications (4:01)
Titanium and Nickel Alloys Special Treatment
What is Grit Blasting and Vapor Degreasing?
Read Chapter 2
Lesson 2 Quiz

Lesson 3: Liquid Penetrant Testing Methods

Emulsifier Principle
Method D Post-emulsifiable technique
Type I vs Type II
Method A, Water-Washable (2:54)
Method B, Lipophilic Emulsification (2:29)
Method C, Solvent-removable (1:55)
Method D, Hydrophilic Emulsification (2:22)
Read Chapter 3
Lesson 3 Quiz
Water Break

Lesson 4: Liquid Penetrant Testing Equipment

Liquid Penetrant Testing Station
Auxillary Equipment
Additional Equipment
Electrostatic Spray Systems
Refractometer
Read Chapter 4
Lesson 4 Quiz

Lesson 5: Selection of Liquid Penetrant Testing Method

Comparing Various Penetrant Types and Methods of Removal
Comparing Various Developer Types
Read Chapter 5
Lesson 5 Quiz

Lesson 6: Interpretation and Evaluation of Indications

What is an ingot?
Categories of Discontinuities
More on Three Stages of Discontinuities (10:12)
Images of various cracks and Forging Lap
Images of Casting Discontinuities
Images of Lamination, Welds and Extrusion Discontinuites
Images of Non-relevant & False Indications
Lesson 6 Quiz

Important Review Videos and Quizzes

Light intensities for Visible and Fluorescent Penetrant Testing
What is flash point?
Review 1
Review 2
Review 3
Recap of all steps in Liquid Penetrant Testing (17:09)
Final Recap Video (26:17)
Practice Questions
Acceptance/Rejection Criteria Questions #1
Acceptance/Rejection Criteria Questions #2
Quiz on E1417/E1417M − 16: Standard Practice for Liquid Penetrant Testing
Sample Written Instruction
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