Industrial X-Ray/Gamma Ray/ Radiography Service in Bangladesh Radiography is the most popular and commonly known non-destructive test method. Radiography can be used to get permanent image of surface and sub-surface discontinuities. The similar discontinuities can be radiographed again after a period of service life and the radiographs can be compared to measure the change in the size and shape of the discontinuity. There are many applications of radiography in engineering applications. Some of the common uses are detection of surface and subsurface features of interest in welded joint