X-ray Detection for Butt Weld of Downward Welding Large Diameter Welded Pipe

In order to improve welding quality of downward welding large diameter welded pipe,selecting suitable X-ray detection process and technology parameters,aim to process characteristics of downward welding large diameter welded pipe,to conduct 100% X-ray detection to butt weld,and effectively found existed defects in weld.Through analysis on defect type,location and caused reason,it reminded welder of strictly observing welding process,avoided defects and ensured welding quality.The results of X-ray film showed that the programmed radiographic mode and process are reasonable.