Liquid Penetrant Courses
Liquid Penetrant Inspection Courses

P2200 Series Level I and II and Limited IIA Courses

Topics to Talk About

Clarifying the Difference between Qualification and Certification in Nondestructive Testing.

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Qualification Hours for PT
Training Hours
Level I Training
Level II Training
  Total Training
Time in Method (Experience)
Level I Experience
Level II Experience
  Total Experience

Liquid Penetrant Inspection (LPI or PT)

Liquid penetrant inspection is a nondestructive testing method that reveals surface breaking flaws by bleedout of a penetrating liquid colored with a visible or fluorescent dye from the flaw. The technique is based on the ability of a liquid to be drawn into a "clean" (in other words, unobstructed) surface breaking flaw by capillary action. After an appropriate period of time for penetration has papsed, called the "dwell time," excess penetrant on the surface is removed and a developer applied. The developer acts as a blotter and draws the penetrant from the flaw to reveal its presence. Penetrants with a visible dyed added (color contrast) require sufficient white light to insure proper inspection, while penetrants with a fluorescent dye added need to be used in darkened conditions with an ultraviolet or "black light". This method is used to inspect a variety of product forms including castings, forgings, and weldments. The structural steel, automotive, petrochemical, power generation, and aerospace industries are a few examples that utilize liquid penetrant inspection.

This course requires no prior training or experience by the student in this method of NDT. The material is presented in a manner that promotes understanding and the ability to make immediate application. This is an excellent course for NDT trainees who must have Level I and II training in order to qualify for certification as well as facility personnel who are responsible for or oversee the application of testing or Quality Control/Quality Assurance.

Course Content

P2210 Liquid Penetrant Inspection Level I and II.
This course provides accurate, current and thorough training that leads directly to the ability of the student to perform valid Liquid Penetrant Testing. Level I and II material is combined and presented in a single classroom course. The course starts with the history of this oldest method of nondestructive testing and continues on through topics such as safety, allowed cleaning methods, scope of application, proper use and calibration of media and equipment, and ends with an overview of the origin and nature of discontinuities. Ample time is allowed for technique demonstrations and hands-on lab exercises. Lecture notes, text book and necessary testing materials are provided.


The curriculum exceeds the content recommended by The American Society for Nondestructive Testing for Level I and II studies. Lesson-by-lesson quizzes monitor progress and all three evaluation examinations (General, Specific and Practical) are administered by a qualified ASNT ACCP Level III. The course also includes a Visual Acuity Test if needed by the student.
[click here to download a PDF course description and outline]

Alternative Course Options

Online courses are also available.
P2211-WB Liquid Penetrant Inspection Level I and II. Online Course
Online courses are ideally suited for Level II technicians that are in need of refresher training or for trainees that have other means of gaining hands-on experience. All online courses include the "body of knowledge" recommended by ASNT and includes a final exam that can be utilized as the method's General Examination.

Specific and Practical Evaluation exams are not included in the online course but can be scheduled for on-campus administration by one of our qualified instructors. Ask for "on-site" examination options if travel to our campus presents a problem.

P2215 PortableTechniques in Liquid Penetrant Inspection - Level IIA.
Because of the frequent need to use only a portable technique (Type I or II, Method C) in liquid penetrant inspection, we offer through request only, a special limited certification training course that is recognized by ASNT. The material covered is limited in scope compared to P2210, and consequently the course length is shorter as well. Depending upon the specific techniques employed, the training and testing can typically be tailored to your needs in a one and a half to two day time period. Call us for details if you think this option meets your needs.

P2210 - Liquid Penetrant Inspection Classroom Course
Level I and II with General, Specific and Practical Qualification Examinations included; 16-hours (2 days)

$ 800.00

P2211-WB - Liquid Penetrant Inspection Online Course SNT-TC-1a, CP-189 and NAS-410
Level I and II with General Qualification Examination; 32-hours (30 days to complete) Click here for more about the Online Liquid Penetrant Inspection course.

$ 525.00

P2215 - Portable Liquid Penetrant Course
Limited Certification Level IIA with General, Specific and Practical Qualification Examinations included. Course available by special arrangement only.

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Qualification Examinations for Liquid Penetrant Inspection:
General Exam - comprehensive written examination that covers the basic principles (Body of Knowledge) of Liquid Penetrant Inspection

$ 150.00
Specific Exam - written examination that tests student's ability to read, interpret and apply specific procedure material for Liquid Penetrant Inspection

$ 150.00
Practical Exam - hands-on demonstration of the student's ability to operate test equipment, perform specific calibrations and tests in order to find and report flaws of sample materials according to appropriate specifications
$ 300.00

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