GB/T 23901.2-2019Non-destructive testing -- Image quality of radiographs -- Part 2: Determination of the image quality value using step/hole-type image quality indicators (English PDF)

Foreword

GB/T 23901 "Non-destructive testing - Image quality of radiographs" is divided

into 5 parts:

- Part 1: Determination of the image quality value using wire-type image

quality indicators;

- Part 2: Determination of the image quality value using step/hole-type image

quality indicators;

- Part 3: Image quality classes;

- Part 4: Experimental evaluation of image quality values and image quality

tables;

- Part 5: Determination of the image quality unsharpness and basic spatial

resolution value using duplex wire-type image quality indicators.

This Part is Part 2 of GB/T 23901.

This Part is drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 23901.2-2009 "Non-destructive testing - Image quality

of radiographs - Part 2: Image quality indicators (step/hole type) - Determination

of image quality value". As compared with GB/T 23901.2-2009, the main

changes are as follows:

- Modify normative references (See Clause 2; Clause 2 of the 2009 edition);

- Modify terms and definitions (See Clause 3; Clause 3 of the 2009 edition);

- CHANGE the expression in Chinese of "Image quality of radiographs"

[Translator note: There is another expression for "Image quality of

radiographs" in Chinese];

- CHANGE the expression in Chinese of "image quality value" [Translator

note: There is another expression for "image quality value" in Chinese];

- CHANGE "film" to "detector".

This Part, using translation method, is identical to ISO 19232-2:2013 "Non-

destructive testing - Image quality of radiographs - Part 2: Determination of the

image quality value using step/hole-type image quality indicators".

The documents of China which have a consistent correspondence with the

international documents normatively referenced in this Part are as follows:

- GB/T 19802-2005 Non-destructive testing - Industrial radiographic

illuminators - Minimum requirements (ISO 5580:1985, IDT)

- GB/T 23901.4-2019 Non-destructive testing - Image quality of radiographs

- Part 4: Experimental evaluation of image quality values and image quality

tables (ISO 19232-4:2013, IDT)

- GB/T 27050.1-2006 Conformity assessment - Suppliers declaration of

conformity - part 1: General requirements (ISO/IEC 17050-1:2004, IDT)

This Part was proposed by and shall be under the jurisdiction of National

Technical Committee 56 on Non-destructive Testing of Standardization

Administration of China (SAC/TC 56).

Responsible drafting organizations of this Part: Shanghai Institute of Space

Propulsion; Shanghai Aerospace Power Technology Engineering Co., Ltd.;

Shanghai Research Institute of Materials; Zhejiang Jinyun IQI. Co.; Hubei

Sanjiang Space Jiangbei Machinery Engineering Co., Ltd.; Matrix Science and

Industry Testing Technologies (Beijing) Co., Ltd.; Shanghai Spaceflight

Precision Machinery Institute; Shanghai Institute of Spacecraft Equipment;

Shanghai Aerospace Equipment Manufacturer Co., Ltd.; Sichuan Aerospace

Chuannan Fire Work Technology Co., Ltd.; China Nuclear Power Engineering

Co., Ltd.; Shanghai Feitian Zhongzhi Technology Co., Ltd.; Zhejiang Academy

of Special Equipment Science; Aerospace Research Institute of Materials &

Processing Technology; CITIC Dicastal Co., Ltd.; Shanghai Acoustics

Laboratory, Chinese Academy of Sciences; Ningbo Special Equipment

Inspection and Research Institute; Shanghai Aerospace Control Technology

Institute; NDT Testing Technology (Shanghai) Co., Ltd.

Main drafters of this Part: Chen Yiwei, Xu Guozhen, Jiang Jiansheng, Ding Jie,

Liu Zhanglong, Wang Xiaoyong, Jiang Yunxi, Zhou Jianping, Wei Quan, Sun

Jiangang, Xu Wei, Zhang Zheng, Zhu Congbin, Wang Daolong, Huang Wenda,

Lv Yanda, Yuan Shengping, Liu Jun, Hu Ling, Chen Hu, Yuan Zhizuo, Zhang

Rui, Zhang Yifeng, Zhai Lianna, Ma Jun.

The previous editions of the standard replaced by this Part were released as

follows:

- GB/T 23901.2-2009.

Non-destructive testing - Image quality of radiographs

- Part 2: Determination of the image quality value

using step/hole-type image quality indicators

1 Scope

This Part of GB/T 23901 specifies a device and a method for the determination

of the image quality of radiographs using step/hole-type image quality indicators.

This Part applies to the determination of the image quality value of radiographs

using step/hole-type image quality indicators.

2 Normative references

The following documents are indispensable for the application of this document.

For the dated references, only the editions with the dates indicated are

applicable to this document. For the undated references, the latest edition

(including all the amendments) are applicable to this document.

ISO 5580 Non-destructive testing - Industrial radiographic illuminators -

Minimum requirements

ISO/IEC 17050-1 Conformity assessment - Supplier's declaration of

conformity - Part 1: General requirements

ISO 19232-4 Non-destructive testing - Image quality of radiographs - Part 4:

Experimental evaluation of image quality values and image quality tables

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.