Issue << content << Method of Calculation of an Exposure when Changing High Voltage on a X-Ray Tube and/or Thickness of the X-Radiography Material


DOI: 10.12737/article_5ca31ab3197268.89364223

2019. Vol.22. No. 1, pp. 25-27

Method of Calculation of an Exposure when Changing High Voltage on a X-Ray Tube and/or Thickness of the X-Radiography Material

A. A. Shilenkov

The accurate evaluation of the NDT instruments and technologies metrological parameters is а problem. It should take into consideration, that the parameters (like accuracy, limit of sensitivity etc.) certified by delivery can differ significantly when the instruments and technologies are used in practice. If one doesn’t take into account this difference, he can be disappointed with testing results which appear significantly worse than had been expected. The NDT users must be qualified enough to avoid this. Requirements for the personnel skill are parts of standards and norms on NDT technologies of concrete objects and are analyzed with regard to the wire steel ropes NDT. Unfortunately, the users meet the requirements not always. This concerns all of NDT devices and methods but especially of the EM and MFL ones, when they are used for the ferromagnetic objects testing such as steel wire ropes, steel-cord conveyor belts, tubes, oil and gas tanks. The paper can be helpful for specialists by NDT of ferromagnetic objects like wire steel ropes especially.
Keywords: film radiography, exposure nomograms, X-ray devices, X-ray tube voltage, material thickness
 
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