小口径管对接焊缝X射线检验的象质指数及一次透照有效范围

DISCUSSION ON IMAGE QUALITY INDEX AND RANGE IN ONE EXPOSURE X-RAY RADIOGRAPHIC IN SPECTION OF THE BUTT WELDS INSMALL DIAMETER TUBES

对目前国内小口径管对接焊缝射线检验四个标准中规定的象质指数,一次透照有效范围提出不同看法.

Based on the theory, testing data and problems found in work, image quality index and one time exposure effective range of X-ray radiographic inspection of the welds in small diameter tubes in four standards of our country are discussed and different opinions are given.