Radiographic testing (RT) makes use of electromagnetic waves within the 0.01 to 10 nanometre (X-rays) or the < 0.01 nanometre (Gamma-rays) spectrum. At these ranges, the electromagnetic
wave can effectively pass through a solid material, and an image can be created, either on film or electronic detection sensors, of what the internal structure of the material might be.
Therefore radiographic testing is a volumetric testing method effective for finding any discontinuities that exceeds a 2% cross-sectional void or material change in relation to the actual beam orientation.
The energy levels of these very short waves exceed 100eV and put the operator at risk of harmful ionisation radiation which cannot be seen, heard, felt, tasted or smelled. Radiation safety training is there for essential in order to achieve and maintain an ALARA (as low as reasonably achievable) exposure rating.
If you are interested in photography and Superman is your favourite DC character, then this is the right NDT method for you. However, please keep in mind you must have a sound knowledge exponents and logarithms. Radiographic techniques depend on the type of wave used, the exposure configuration and the image formation.
The training course is based on general theory as well as sector specific applications relating, but not limited to, the following standards and specifications:
- ASME Boiler & Pressure Vessel Code – Section V – Subsection A – Article 1 & 2
- ASME Boiler & Pressure Vessel Code – Section V – Subsection B – Article 22
- ISO 10675 Part 1 & 2 RT – Acceptance levels
- ISO 17636-1 RT – X and gamma ray techniques
- ISO 19232 Parts 1 to 5 RT – Image quality of radiographs
- ISO 11699 Parts 1 & 2 RT – Industrial radiographic films
- ISO 5580 RT – Metallic materials using X- or gamma rays– Basic rules
- ISO 5576 RT – Vocabulary
Details of specific codes utilised in the limited (RT 2.Int) as well as derived or advanced techniques courses (RT 2.9) can be found in the relevant training documents.