A Review of Current Status in Applying Special Radiographic Techniques to Pressure Equipment in China

摘要

Special radiographic examination(RT) techniques for the common and special welded joints in pressure equipment are outlined, covering the tube-to-tube sheet joints of heat exchangers and the nozzle and branch joints of various vessels for which the examination procedures are more difficult. The characteristics and attention matters of mega-voltage radiography and the main points and difficulties in radioscopic real-time imaging techniques are pointed out. Finally, the state-of-art and future of digital radiography are described.