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讨论小口径管(外径D≤89mm)双壁双影椭圆成像上焊缝中的圆形缺陷等级的评定计算,修正了同一当量大小的圆形缺陷分别存在于上、下焊缝时的变化情况,对合理的评定焊缝质量等级具有一定的参考价值。
Discuss the evaluation and calculation of the circular defect grade in the weld on the double-walled double-ellipse oval tube (OD≤89mm), and correct the change of the circular defect of the same equivalent size in the upper and lower weld The situation, has a certain reference value for the reasonable assessment of weld quality level.