Examination of the X-ray piping diagnostic system using EGS4: Examination of the film and iron rust

In the X-ray piping diagnosis system, the old pipe is taken X-ray photograph, and from the density of the image of the pipe in the lm, the thickness of the pipe is measured using the relationship between the density and the thickness. First, as for the relationship between the density and the absorbed energy in the lm, though good agreement was obtained last year, it is improved more by making energy bin smaller in the calculation of EGS4. The reason of the agreement was researched and understood. Next, using EGS4, the calculation of the thickness of the steel was carried out which is covered with the rust, using the element analysis result of the rust sample that was collected in the old pipe. When the thickness changes, the rate for the energy absorption of the steel and the rust layer changes. This relationship between the energy absorption and the thickness of the layers is expressed approximately in the formula. It will be re ected on the diagnosis of the pipe.