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GB/T 3323.2-2019: Non-destructive testing of welds -- Radiographic testing -- Part 2: X-and gamma-ray techniques with digital detectors Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 3323.2-2019: Non-destructive testing of welds -- Radiographic testing -- Part 2: X-and gamma-ray techniques with digital detectors---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT3323.2-2019 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.160.40 J 33 Non-destructive testing of welds - Radiographic testing - Part 2.X-and gamma-ray techniques with digital detectors (ISO 17636-2.2013, MOD) Issued on. AUGUST 30, 2019 Implemented on. MARCH 01, 2020 Issued by. State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 6 4 Symbols and abbreviations... 12 5 Classification and compensation rules of radiographic testing technology. 13 6 General... 15 7 Recommended digital radiography technology... 19 8 Testing report... 43 Appendix A (Normative) Minimum image quality value... 45 Appendix B (Normative) Determination of basic spatial resolution... 50 Appendix C (Normative) Recommended number of exposures for 100% digital radiographic testing of butt girth welds... 55 Appendix D (Normative) Determination method for minimum gray value by CR technology... 60 Appendix E (Informative) Discussion on gray value... 66 References... 68ForewordGB/T 3323 "Non-destructive testing of welds - Radiographic testing" is divided into the following two parts. - Part 1.X-and gamma-ray techniques with film; - Part 2.X-and gamma-ray techniques with digital detectors. This part is Part 2 of GB/T 3323. This part was drafted in accordance with the rules given in GB/T 1.1-2009. This part uses the redrafting method to modify and adopt ISO 17636-2.2013 "Non-destructive testing of welds - Radiographic testing - Part 2.X-and gamma- ray techniques with digital detectors". Compared with ISO 17636-2.2013, the structure of this part is slightly adjusted, that is, the order of Appendix A, Appendix B, Appendix C has been adjusted; clause 6.9 is moved to 6.7; the rest is postponed accordingly. Compared with ISO 17636-2.2013, the main technical differences and reasons for this part are as follows. - Regarding normative references, this part has made adjustments with technical differences, to adapt to China's technical conditions. The adjustments are reflected in Chapter 2 "Normative references". The specific adjustments are as follows. ● USE GB/T 12604.2, which identically adopts the international standard, to replace ISO 5576 (see Chapter 3); ● USE GB/T 9445, which identically adopts the international standard, to replace ISO 9712 (see 6.9); ● USE GB/T 23901.1, which identically adopts the international standard, to replace ISO 19232-1 (see 5.1, 6.8.1, 6.8.3); ● USE GB/T 23901.2, which identically adopts the international standard, to replace ISO 19232-2 (see 5.1, 6.8.1, 6.8.3); ● USE GB/T 23901.4, which identically adopts the international standard, to replace ISO 19232-4 (see 6.7); ● USE GB/T 23901.5, which identically adopts the international standard, to replace ISO 19232-5 (see 3.8, 3.9, 5.1, 6.8.1, Table A.13, Table A.14, Appendix B); ● USE GB/T 25758 (all parts), which identically adopts the international standard, to replace EN 12543.1 ~ 12543.5 (see 7.6); ● ADD reference to GB/T 12604.11, to facilitate understanding, communication, use. This part also made the following editorial changes. - MODIFY and ADJUST the order of references. This part was proposed by AND shall be under the jurisdiction of the National Welding Standardization Technical Committee (SAC/TC 55). Drafting organizations of this part. Shanghai Institute of Materials, Shanghai Aerospace Power Technology Engineering Co., Ltd., Baoji Petroleum Steel Pipe Co., Ltd. (National Petroleum and Natural Gas Pipe Engineering Technology Research Center), Hubei Sanjiang Aerospace Jiangbei Mechanical Engineering Co., Ltd., China Guangdong Nuclear Engineering Co., Ltd., China The Ningbo Branch of the Ordnance Science Research Institute, Zhejiang Youerte Testing Technology Co., Ltd., Harbin Welding Research Institute Co., Ltd., Aintick Testing Technology (Shanghai) Co., Ltd., CITIC Dicastal Co., Ltd., Comertech Machinery Equipment (Shanghai) Co., Ltd., Dandong Huari Rigaku Electric Co., Ltd. The main drafters of this part. Jiang Jiansheng, Zhang Yifeng, Bi Zongyue, Xu Guozhen, Ding Jie, Wang Xiaoyong, Zhu Congbin, Wang Bin, Xu Xiangqun, Lu Junmin, Xu Leihui, Song Cheng, Huang Dongqin, Zhang Rui, Liu Jun, Su Jinhua, Lu Bo, Yu Kaibo, Fu Hongqiang, Ma Chongxian. Non-destructive testing of welds - Radiographic testing - Part 2.X-and gamma-ray techniques with digital detectors1 ScopeThis part of GB/T 3323 is based on the basic theory and practical experience of digital radiography; specifies the general technology and requirements using computer radiography (CR) technology and digital imaging (DR) technology, which use the digital detector array (DDA), to perform X-and gamma-ray digital detection, for the welded joints of metal materials, including the technical level, general requirements, recommended technologies of X-and gamma-ray digital detection technology (detector system's selection, penetration technology control, image acquisition and display requirements), etc.;2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.3 Terms and definitionsThe terms and definitions as defined in GB/T 12604.2 and GB/T 12604.11, as well as the following terms and definitions, apply to this document.4 Symbols and abbreviationsThe symbols and abbreviations, which are given in Table 1, apply to this document.5 Classification and compensation rules of radiographic testing technologyFor insufficient contrast (such as caused by increased tube voltage), compensate by increasing SNR (such as by increasing tube current or exposure time).6 GeneralThe surface of the object should be permanently marked, to ensure the accurate positioning of each digital image (for example. zero point, direction, marking, size, etc.).7 Recommended digital radiography technologyThe ray source is located on one side of the tested object, whilst the digital detector is located on the other side, as shown in Figure 1.8 Testing reportAfter the digital radiographic testing, it shall record the testing results and relevant testing parameters in detail; fill the testing report, so that the testing results can be inquired under any circumstances. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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