承压设备无损检测第11部分：X射线数字成像检测.pdf

NB/T47013.11—xxxx

目次

前言·····················································································································II

1范围·················································································································1

2规范性引用文件··································································································1

3术语和定义········································································································1

4一般要求···········································································································4

5检测方法···········································································································7

6图像质量及评定································································································11

7缺陷的识别与测量······························································································16

8承压设备焊接接头焊缝射线数字成像检测质量分级····················································17

9图像保存与存储································································································17

10检测记录和报告································································································17

附录A（规范性附录）系统分辨率核查方法·····························································19

附录B（资料性附录）典型透照方式········································································20

附录C（规范性附录）b值计算··············································································24

附录D（资料性附录）环缝最小透照次数计算····························································26

附录E（规范性附录）双线型像质计的识别·······························································29

附录F（规范性附录）归一化信噪比测试方法·············································