管材成品探伤,缺陷大小的判定一般采用当量定量法,即用一或数个标准人工缺陷作为判断缺陷大小的依据。因此,标准人工缺陷反射高度与人工缺陷形状大小的关系,理应清楚标定。但,不同资料说法不一。如,文献认为,存在两个界限深度和对应的两种缺陷定量式,而在两个界限深度 Tube finished product testing, the size of the defect is generally used to determine the equivalent quantitative method, that is, with one or several standard artificial defects as a basis for determining the size of defects. Therefore, the standard height of artificial defects and artificial defect shape of the relationship between the size should be clearly calibrated. However, different sources have different opinions. For example, the literature suggests that there are two quantitative limits for the two depth limits and the corresponding two kinds of flaws, whereas in the two boundary depths