Comparison and analysis on radiographic testing standards for welded joints in pressure pipeline construction process

Pressure pipelines are classified into industrial, public, and long-distance pipelines based on their properties and uses. The radiographic testing standards for their welded joints involve NB/T 47013.2, GB/T 12605, and SY/T 4109. There are certain differences among the three standards in terms of testing applicability, testing process, and testing quality grading. This paper systematically compared and analyzed the relevant characteristics and differences, providing reference for personnel engaged in pressure pipeline design, construction, testing, and construction supervision, especially reminding designers and owners to comprehensively select the above standards.