Abstract:Different from the method of Oval imaging method on ray detection of narrow鄄bore tube weld, the Ul鄄
tra narrow鄄bore tube weld detection normally use the vertical transillumination method. The essay discusses the choice
of oval imaging and the vertical transillumination method through the transillumination thickness ratio and the imaging
displacement analysis, base on the specific circumstances of the Ultra narrow鄄bore tube. According to the feature of
ray image overlay of vertical double鄄wall single shadow transillumination, the essay do key analysis on the image fea鄄
ture of the Ultra narrow鄄bore tube opposite reinforcement, propose two practical way of measuring the figure of oppo鄄
site reinforcement. The essay concludes that the simplified transillumination satisfy the actual needs of the project.
