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GB/T 39638-2020: X-ray digital radiographic testing for casting
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X-ray digital radiographic testing for casting
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GB/T 39638-2020
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Basic data | Standard ID | GB/T 39638-2020 (GB/T39638-2020) | | Description (Translated English) | X-ray digital radiographic testing for casting | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J31 | | Classification of International Standard | 77.040.20 | | Word Count Estimation | 27,268 | | Date of Issue | 2020-12-14 | | Date of Implementation | 2021-07-01 | | Quoted Standard | GB/T 5677; GB/T 9445; GB/T 12604.11; GB 18871; GB/T 23901.1; GB/T 23901.2; GB/T 23901.5; GB/T 30821; GB/T 35389; GB/T 35394; GBZ 98; GBZ 117 | | Regulation (derived from) | National Standard Announcement No. 28 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the classification and compensation rules, general requirements, inspection technology, image evaluation, inspection records and reports of the X-ray digital imaging inspection technology for castings using Digital Detector Array (DDA). This standard applies to castings of steel, iron, copper and copper alloys, nickel and nickel alloys, aluminum and aluminum alloys, magnesium and magnesium alloys, titanium and titanium alloys, and other metal material castings can also be used by reference. | GB/T 39638-2020: X-ray digital radiographic testing for casting---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(X-ray digital imaging inspection of castings)
ICS 77:040:20
J31
National Standards of People's Republic of China
X-ray digital imaging inspection of castings
2020-12-14 release
2021-07-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Symbol 3
5 Ordering instructions 4
6 Radiation inspection technology classification and compensation rules 4
7 General requirements 5
8 Testing technology 7
9 Image evaluation 19
10 Inspection records and reports 20
Appendix A (Normative Appendix) Minimum Image Quality Value 21
Foreword
This standard was drafted in accordance with the rules given in GB/T 1:1-2009:
This standard was proposed and managed by the National Foundry Standardization Technical Committee (SAC/TC54):
Drafting organizations of this standard: Shenyang Foundry Research Institute Co:, Ltd:, Lanzhou Rich God Measurement and Control Technology Co:, Ltd:, Changsha Dicastal Technology Co:, Ltd:
Company, China Railway Baoqiao Group Co:, Ltd:, Shanghai Yirui Optoelectronic Technology Co:, Ltd:, Jinyun County Kelier Testing Equipment Co:, Ltd:, China
Xindaikar Co:, Ltd:, Suzhou Industrial Park Daoqing Technology Co:, Ltd:, Chengdu Kessel Electronics Co:, Ltd:, Dandong Aolong Ray Instrument
Group Co:, Ltd:, Shanghai Huizhong Automobile Manufacturing Co:, Ltd:, Shanghai Aerospace Precision Machinery Research Institute, Datang Boiler and Pressure Vessel Inspection Center have
Co:, Ltd:, Lanzhou Lanshi Testing Technology Co:, Ltd:, Lanzhou Lanshi Group Co:, Ltd: Casting and Forging Branch, Chiping Xinfa Aluminum Products Co:, Ltd:, China
The 52nd Research Institute of China North Industries Group:
The main drafters of this standard: Li Xingjie, Sun Zhongcheng, Liu Jun, Yang Long, Lu Qifeng, Tao Weidao, Wang Xuebin, Wang Hanchao, Guo Zongshan, Wang Ji,
Xu Xu, Ni Mansheng, Qiao Ridong, Sun Chungui, Dong Wenbo, Yu Han, Alateng, Luo Xiang, Kong Qingbo, Wei Quan, Liu Yingzhuo, Zhou Pengfei, Jiang Chunhong, Wang Bingzheng,
Yang Wu, Li Yibin, Sun Pu, Wang Chen, Liu Feng, Guo Zhimin, Wu Fangming, Qiu Changchang, Zhang Zhouxu:
X-ray digital imaging inspection of castings
1 Scope
This standard specifies the classification and compensation rules of X-ray digital imaging detection technology for castings using Digital Detector Array (DDA), general
Requirements, inspection technology, image evaluation, inspection records and reports, etc:
This standard applies to the casting of steel, iron, copper and copper alloys, nickel and nickel alloys, aluminum and aluminum alloys, magnesium and magnesium alloys, titanium and titanium alloys, etc:
Parts, other metal material castings can also be used as reference:
2 Normative references
The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article
Pieces: For undated references, the latest version (including all amendments) applies to this document:
GB/T 5677 Casting radiographic inspection
GB/T 9445 Non-destructive testing personnel qualification and certification
GB/T 12604:11 Non-destructive testing terminology X-ray digital imaging testing
GB 18871 Basic standard for ionizing radiation protection and radiation source safety
GB/T 23901:1 Non-destructive testing: Radiographic testing of image quality: Part 1: Determination of image quality value of silk-type image quality indicator
GB/T 23901:2 Non-destructive testing: Radiographic testing of image quality: Part 2: Determination of image quality value of step hole image quality indicator
GB/T 23901:5 Non-destructive testing: Radiographic testing of image quality: Part 5: Double-filament image quality indicators with unclear images
Determination
GB/T 30821 Non-destructive testing digital image processing and communication
GB/T 35389 Non-destructive testing X-ray digital imaging testing guidelines
GB/T 35394 Non-destructive testing X-ray digital imaging testing system characteristics
GBZ 98 Health requirements for radiation workers
GBZ 117 Industrial X-ray inspection radiation protection requirements
3 Terms and definitions
The following terms and definitions defined in GB/T 12604:11 apply to this document:
3:1
Nominalthickness
The nominal wall thickness of the material, regardless of deviation:
3:2
Penetratedthickness
The nominal thickness of the material in the radiographic direction: In the case of multi-wall transillumination, the penetration thickness is the sum of the nominal thickness of each layer of material passed through:
3:3
The distance from the workpiece to the detector objecttoDDAdistance
The distance between the surface of the inspected workpiece at the source side and the detector measured along the centerline of the ray beam:
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