Abstract: The special type of fuel pressure equipment in-service was always in hazard condition and corrosion perforation occurs frequently. The leakage of hazardous medium shall cause serious disaster and environment pollution. In this paper, the principle and characteristics of digital radiography and experimental results were introduced, and digital radiographic corrosion imaging technique on the pipeline was researched. Practical applications showed that the method for the special type of fuel of pressure pipeline of large area scanning was a fast way,it was an effective means for the pressure equipment welding defects and corrosion detection.