Visual Testing (VT)
The method of Visual Testing (VT) , is the oldest and most common NDT method and is used prior to and along with all the other techniques in Non-Destructive Testing during the inspection procedure.
At its core, VT is the observation of a specimen, either directly or indirectly. Observation may be used to locate and size surface and surface-breaking discontinuities in opaque materials, detect subsurface discontinuities in translucent or transparent materials, detect structural problems, observe or measure clearance, detect leaking, and judge conformance to a specification.
The specific method uses the human eye as a basic tool and in combination with the appropriate techniques and equipment (magnifying glasses, endoscopes, mirrors etc.). It can be implemented at any stage of the construction or operation of the parts and can reveal important manufacturing or service flaws.
This course covers all the theoretical as well as practical aspects of the method, including the required codes and specifications as well as the acceptance criteria on every case.
Course Content
- Introduction
- Definitions
- Fundamentals (Vision/Lighting/Perception/Methods)
- Equipment
- Applications, Inspection and Testing
- Reporting the results
- Procedures-Standards-Codes
- Vision principles, limitations and disorders
- Lighting
- Material attributes
- Environmental and Physiological Factors
- Visual Perception
- Surface conditions
- Applications-Codes and Standards
- Evaluation, Recording and Reporting
- Basic Production Processes
- Product Technology
- Basic Steel metallurgy
- Discontinuities of materials
- Instruction writing
- Extensive Practical element
Responsibilities of a Visual Testing Level 2 NDT professional:
- Select the Visual Testing technique for the test method to be used
- Define the limitations of application of the testing method
- Translate codes, standards, specifications and procedures into Visual Testing instructions adapted to the actual working conditions
- Set up and verify Visual Testing equipment settings
- Perform and supervise Visual Inspection(s)
- Interpret and evaluate results according to applicable standards, codes, specifications or procedures
- Prepare written Visual Testing instructions
- Carry out and supervise all tasks at or below Level 2
- Provide guidance for personnel at or below Level 2
