Liquid Penetrant Testing (PT)
Learn how liquid penetrant inspection is used to locate surface-breaking discontinuities in metals and non-porous materials. This method is commonly applied in manufacturing, aerospace, and maintenance inspections where surface integrity is critical.
Why Take This Course?
Nondestructive testing (NDT) training prepares technicians, inspectors, and engineers with the knowledge needed to inspect critical components without causing damage. These courses are designed to support career advancement across industries such as oil & gas, aerospace, manufacturing, energy, and infrastructure while helping students build the training hours required for employer-based certification programs.
Flexible
Study at your own pace with 24/7 access to course materials. No travel expenses or time off work required—complete your training on your schedule, from anywhere.
Industry-Relevant Training
Our courses are designed for working professionals and may be used toward continuing education or recertification requirements. Training hours may qualify for recertification or professional development units through organizations such as API, AWS, and ASNT, depending on the certifying body’s requirements.
Learn From Experts
Professionally developed courses created and reviewed by field experts with decades of hands-on experience. Access instructor support whenever you need guidance throughout your training.
What You'll Learn
Our comprehensive 12-hour program combines Level I fundamentals (4 hours) with Level II advanced techniques (8 hours), providing complete penetrant testing training. This integrated approach ensures you master both basic principles and advanced evaluation skills for professional PT applications.
Your learning journey is tracked through our Learning Management System (LMS), allowing you to revisit any lesson as many times as needed during your enrollment. The curriculum progresses from foundational PT concepts through advanced technique selection and defect interpretation, preparing you to perform and evaluate liquid penetrant inspections across diverse materials and applications.
You’ll gain proficiency in penetrant types and selection, surface preparation requirements, application techniques, developer functions, and discontinuity evaluation. The training covers visible dye, fluorescent, and dual-mode penetrant systems, teaching you when and how to apply each method for optimal defect detection.
Upon completion, you’ll be qualified to select appropriate penetrant materials, execute inspection procedures, interpret indications, and evaluate results against acceptance criteria in accordance with industry codes and specifications including ASTM E1417, ASME Section V, and AWS D1.1.
Required Textbook Purchase
To meet certification and regulatory requirements, all students are required to purchase the ASNT Liquid Penetrant Testing Classroom Training Book (Second Edition) directly from ASNT. This textbook is an essential resource and is necessary for successful completion of the course.
Students may choose between a physical copy or a digital edition, allowing them to begin their studies right away in whichever format best suits their needs.
Please note: due to ASNT’s copyright protections on digital materials, the National Inspection Academy cannot facilitate the purchase on your behalf. All orders must be made directly through ASNT.
Training Certificate
Upon successful completion of this course, students will receive a National Inspection Academy Certificate of Completion documenting the required training hours and successful examination in accordance with the guidelines outlined in ASNT SNT-TC-1A, CP-189, NAS-410, and the course outline requirements of ANSI/ASNT CP-105.
