SNT course

Lesson 1 • Discontinuities and Material Defects

Identifies types of discontinuities, their origins, and their significance to structural integrity. Connects defect knowledge to method sensitivity requirements.

Lesson 2 • Safety and Regulatory Compliance

Covers hazard identification, personal protective equipment, and regulatory compliance in NDT environments. Establishes safe work habits before hands-on practice.

Lesson 3 • NDT Method Classification

Surveys the major NDT method families and their physical principles. Enables students to match methods to inspection scenarios.

Lesson 4 • Introduction to NDT Concepts

Defines nondestructive testing, its purpose, and its distinction from destructive methods. Provides the conceptual baseline for all subsequent SNT study.

Lesson 1 • Physics of Visual Inspection

Explains light behavior, contrast, and human visual perception as they apply to VT. Grounds technique selection in optical principles.

Lesson 2 • VT Documentation and Reporting

Establishes standards for recording VT findings, sketching discontinuity locations, and writing inspection reports. Ensures traceability and regulatory compliance.

Lesson 3 • Remote Visual Testing Tools

Introduces rigid and flexible borescopes, video probes, and robotic crawlers for inaccessible areas. Connects remote VT to confined-space and in-service inspection needs.

Lesson 4 • Direct Visual Testing Techniques

Covers unaided and aided direct VT methods including mirrors, magnifiers, and borescopes. Students apply correct viewing angles and distances.

Lesson 1 • PT System Performance Checks

Covers daily and periodic checks of penetrant materials, lighting, and process controls. Maintains inspection reliability and system qualification.

Lesson 2 • PT Physical Principles

Explains capillary action, surface tension, and wetting as the physical basis of PT. Links fluid properties to penetrant performance.

Lesson 3 • PT Process Sequence

Details the six-step PT process from pre-cleaning to post-cleaning. Ensures correct dwell times, removal, and development procedures.

Lesson 4 • Interpretation and Evaluation

Trains recognition of relevant, non-relevant, and false indications under correct lighting. Connects interpretation to acceptance criteria.

Lesson 1 • Magnetic Particle Media

Classifies dry and wet, fluorescent and visible particle systems and their application conditions. Links media selection to sensitivity and surface condition.

Lesson 2 • Magnetic Field Principles

Explains magnetic flux, permeability, and leakage fields as the physical basis of MT. Establishes why only ferromagnetic materials are testable by MT.

Lesson 3 • MT Indication Interpretation

Trains classification of MT indications as relevant, non-relevant, or false and links findings to acceptance standards. Builds systematic evaluation habits.

Lesson 4 • Demagnetization Procedures

Explains residual magnetism effects and demagnetization methods for coil and yoke techniques. Ensures parts meet residual field limits after inspection.

Lesson 1 • Radiograph Interpretation

Trains systematic film reading, density measurement, and discontinuity characterization. Connects image features to weld and casting defect types.

Lesson 2 • Radiation Physics and Sources

Covers X-ray production, gamma-ray emission, and the interaction of radiation with matter. Provides the physics basis for exposure and image quality decisions.

Lesson 3 • Exposure Technique and Geometry

Explains source-to-film distance, geometric unsharpness, and exposure chart use. Students calculate correct exposure parameters for given material thicknesses.

Lesson 4 • Radiation Safety and Shielding

Covers dose limits, shielding design, survey instruments, and controlled area management. Ensures students practice RT within accepted radiation protection principles.

Lesson 1 • UT Equipment and Probes

Covers flaw detector controls, straight-beam and angle-beam probes, and search unit selection. Students configure equipment for specific inspection tasks.

Lesson 2 • Ultrasonic Wave Physics

Explains wave modes, velocity, wavelength, and acoustic impedance as the physical basis of UT. Grounds probe selection and calibration in wave behavior.

Lesson 3 • Calibration and Reference Standards

Details calibration block types, distance-amplitude correction, and sensitivity setting procedures. Ensures measurement traceability and consistent defect sizing.

Lesson 4 • Scanning Techniques and Coverage

Covers manual scanning patterns, index point determination, and scan overlap requirements. Students achieve full volumetric coverage of welds and plate.

Lesson 1 • ET Probes and Instrumentation

Classifies absolute, differential, and reflection probes and their signal characteristics. Students select probe type and frequency for given inspection objectives.

Lesson 2 • Signal Interpretation and Reporting

Trains impedance plane signal analysis, crack vs. geometry signal discrimination, and report writing. Connects ET findings to acceptance standards.

Lesson 3 • Calibration and Reference Standards

Covers reference standard fabrication, phase rotation, and sensitivity setting for ET. Ensures repeatable and traceable inspection results.

Lesson 4 • Electromagnetic Induction Principles

Explains Faraday's law, eddy current generation, and the impedance plane as the basis of ET. Provides the theoretical framework for signal interpretation.

Lesson 1 • Procedure and Technique Qualification

Details the process for qualifying NDT procedures through demonstration and documentation. Ensures procedures meet applicable code and standard requirements.

Lesson 2 • Fitness-for-Service Assessment Basics

Explains fracture mechanics concepts, flaw sizing requirements, and fitness-for-service decision frameworks. Links NDT output to structural integrity evaluation.

Lesson 3 • Probability of Detection Concepts

Introduces POD curves, hit-miss analysis, and their role in validating inspection reliability. Connects statistical performance data to method qualification.

Lesson 4 • Multi-Method Inspection Planning

Covers systematic selection and sequencing of NDT methods for complex components. Students produce written inspection plans aligned with applicable standards.