Requirements for Radiography Inspection of Pipeline in Standard SY/T 4109-2005

The paper introduces the characteristics of newly-issued standard SY/T 4109-2005. 《Non-destructive Inspection of Steel Pipe for Oil and Gas Pipeline》in the aspects of radiography inspection technique and film evaluation. Compared with JB/T 4730-2005 (industry standard), the new standard regulates that during radiography inspection, image indicator should be put on the film side, prior to center transmission on single wall of pipe, and evaluation standards on defects in string slag, lack of fusion, sag and penetration is extended a certain limit. The author considers that the pertinence and operability of the new standard for the radiography inspection of pipeline are further stronger.