Radiographic Testing Level I Training and Certification SNT-TC-1A
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Program Professional Framework
Radiographic Testing Level I Training and Certification SNT-TC-1A
Program Overview
Radiographic testing remains a core volumetric inspection method for welds and castings in pipelines, pressure vessels and plant piping. This entry-level programme builds the knowledge a Level I technician needs to perform radiographic exposures under written instructions: radiation physics, X-ray and gamma sources, film and digital imaging, image quality indicators, exposure set-up and darkroom or digital processing. Radiation protection is treated as a working discipline throughout, including dose monitoring and controlled area management in line with national radiation regulators in the Gulf.
Learning Outcomes
- ✓Explain the interaction of X-rays and gamma rays with matter and its effect on radiographic contrast and density.
- ✓Set up a single-wall exposure using a written technique sheet, correct source-to-film distance and IQI placement.
- ✓Apply the inverse square law and time, distance and shielding principles to define a controlled area boundary.
- ✓Process film or acquire digital images and check density and IQI sensitivity against the technique requirements.
- ✓Record exposure parameters and results accurately on standard inspection reporting forms.
Target Audience
- Trainee and junior NDT technicians
- Welding and fabrication inspectors entering radiography
- QA/QC personnel in pipeline and pressure equipment projects
- Radiation safety assistants supporting site radiography crews
Detailed Program Modules
01Principles of Radiography and Radiation Physics
- Electromagnetic radiation, attenuation and scatter
- X-ray tubes versus gamma isotopes such as Ir-192 and Se-75
- Radiographic density, contrast and definition
02Radiation Safety and Regulatory Control
- Dose limits, ALARA and personal dosimetry
- Controlled area set-up, survey meters and warning systems
- Source handling, storage and emergency response
03Imaging Media and Equipment
- Film types, screens and cassettes
- Computed and digital radiography basics
- Exposure devices, collimators and accessories
04Exposure Techniques and Image Quality
- Source-to-object distance and geometric unsharpness
- Wire-type and hole-type IQIs and their placement
- Single-wall and double-wall techniques for pipe welds
05Processing and Image Checks
- Manual and automatic film processing
- Densitometer use and acceptable density ranges
- Common artefacts and their causes
06Written Instructions and Reporting
- Following technique sheets and procedure requirements
- Level I responsibilities and limits under SNT-TC-1A
- Completing exposure records and handing over to Level II
Training Methodology
Applied Project & Assessment
Applied Project
Each participant prepares a complete exposure package for a butt-welded pipe joint: technique sheet parameters, IQI selection and placement sketch, controlled area calculation with barrier distances, and a completed exposure record ready for Level II evaluation.
Assessment
Short diagnostic at the start, practical tasks linked to each learning outcome, and evaluation of the applied project against published criteria.