The Main Difference Between JB/T 4730 and SY/T 4109 in Radiographic Testing

The standards / codes, JB/T 4730.2—2005 “NDT of Pressure Equipment” and “NDT of Oil & Gas Steel Pipeline” are widely used in NDT. Comparing the main difference between the two standards in radiographic part testing herein, present paper aims to make NDT operator understanding and using the standards / codes accurately, and then to ensure the quality of NDT and welding works.