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对管径小于等于 89mm的管道焊接对接接头用γ源进行透照 ,着重介绍了对电厂管道焊接对接接头的透照方法 ,并将其作了分析讨论。用这种方法透照的焊接对接接头双壁双投影椭圆开口间距为 5mm～ 1 0 mm,所检焊口有效检出范围大、清晰度好 ,底片灵敏度指数达到标准规定的要求 ,对于排管以及在狭小空间位置变动较大的管线进行检验 ,可获得理想的射线底片质量 ,有效地检出焊缝内部缺陷。
The pipe welding butt joint with diameter less than or equal to 89mm is transparently transmuted with γ source, and the method of transilluminating the welding butt joint of power plant pipeline is emphatically introduced. The method of transillumination is discussed and discussed. The penetration distance of double-wall double-projection elliptical openings of welding butt joints welded by this method is 5 mm to 10 mm. The effective detection range of welded joints is large and the definition is good. The sensitivity index of the negative film meets the standard requirements. As well as changes in the larger space of a small space to test the line, you can get the ideal quality of the radiograph, the effective detection of defects within the weld.