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GB/T 26838-2024 English PDFUS$479.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 26838-2024: Non-destructive testing instruments - Portable industrial X-ray radiographic equipment Status: Valid GB/T 26838: Evolution and historical versions
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GB/T 26838-2024: Non-destructive testing instruments - Portable industrial X-ray radiographic equipment---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. Non-destructive testing instruments - Portable industrial X-ray radiographic equipment Nondestructive testing equipment Portable Industrial X-ray Flaw Detector Non-destructive testing instruments- Portable industrial X-ray radiographic equipment ICS 19.100 CCS N 78 National Standard of the People's Republic of China Replaces GB/T 26838-2011 Released on 2024-08-23 2025-03-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface ... Ⅲ 1 Scope ... 1 2 Normative references ... 1 3 Terms and Definitions ... 1 4 Product categories ... 1 4.1 Product Model ... 1 4.2 Main technical parameters ... 2 5 Technical requirements ... 2 5.1 Conditions of use 2 5.2 Performance ... 2 5.3 Stability ... 4 5.4 Radiation Protection and Safety 4 5.5 Appearance Requirements ... 4 6 Test methods ... 4 6.1 Test conditions 4 6.2 Main instruments and apparatus for testing 5 6.3 Penetration Test 5 6.4 Relative sensitivity determination 7 6.5 Measurement of radiation angle and radiation field uniformity 7 6.6 Measurement of the radiation angle of circumferential X-ray machine ... 9 6.7 Timer Error Determination 9 6.8 Tube Voltage Error Measurement ... 9 6.9 Tube Voltage Regulator Measurement ... 10 6.10 Overcurrent protection measurement ... 10 6.11 Overvoltage protection measurement 10 6.12 Temperature protection measurement ... 11 6.13 Measurement of tube current under-milliampere protection device ... 11 6.14 Continuous working stability performance measurement 11 6.15 Measurement of output voltage fluctuation of frequency conversion and gas-insulated main circuit voltage stabilization circuit ... 11 6.16 Determination of ambient dose equivalent rate caused by radiation leakage ... 11 6.17 Low voltage circuit insulation resistance measurement ... 11 6.18 Measurement of grounding resistance of grounding protection device 11 6.19 Low voltage circuit insulation strength measurement ... 11 6.20 High Voltage Circuit Insulation Strength Measurement ... 12 6.21 Determination of insulation strength of secondary side of high voltage transformer to ground 12 6.22 Measurement of insulation resistance of primary side of high voltage transformer to ground ... 12 6.23 Determination of insulation strength of primary side of filament transformer to ground ... 12 6.24 Appearance Quality Inspection ... 12 6.25 Leakage determination ... 12 6.26 Transportation and storage environment test ... 12 6.27 Packaging test ... 12 7 Inspection Rules ... 12 7.1 Factory Inspection ... 12 7.2 Type inspection 12 8 Marking, packaging, transportation and storage ... 13 8.1 Logo 13 8.2 Packaging ... 14 8.3 Transportation and storage 14 Appendix A (Informative) Penetration Test Block for Industrial X-ray Machines ... 15ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting is required. This document replaces GB/T 26838-2011 "Non-destructive testing instruments Portable industrial X-ray flaw detectors" and Compared with GB/T 26838-2011, in addition to structural adjustments and editorial changes, the main technical changes are as follows. Added "Terms and Definitions" (see Chapter 3); a) Changed "Product Model" (see 4.1, 3.1 of the.2011 edition); b) Changed "ambient temperature" [see 5.1 b), 4.1 b) of the.2011 edition]; c) Added "frequency" requirement [see 5.1 e)]; d) Changed "Exposure" (see Table 1, Table 2, Table 3, Table 1, Table 2, Table 3, Table 4 of the.2011 edition); e) Deleted the description of “directional, power frequency, oil-insulated X-ray machine penetration and main model” (see Table 2 of the.2011 edition); f) Changed "temperature protection device" (see 5.2.9, 4.2.9 of the.2011 edition); g) Changed the description of “Radio-leakage air kerma rate” (see 5.4.1, 4.4.1 of the.2011 edition); h) The test procedure of “Penetration Determination” has been changed (see 6.3.2, 5.3.2 of the.2011 edition); i) Changed the “Schematic diagram of the penetration test of directional X-ray machine” (see Figure 2, Figure 2 of the.2011 edition) j) Added “Schematic diagram of circumferential X-ray machine penetration test” (see Figure 3 of 6.3.3.1); k) Changed the “IQI Placement Diagram” (see Figure 4, Figure 3 of the.2011 edition); l) Deleted some descriptions on the measurement of radiation angle of directional X-ray machine (see 5.5.1 of the.2011 edition); m) Deleted "Measurement of tube voltage error by spherical gap discharge method" (see 5.8.1 of the.2011 edition); n) The test method for “Radiation leakage air kerma rate” has been modified (see 6.16, 5.17 of the.2011 edition); o) Deleted "cleanliness testing" (see 5.26 of the.2011 edition); p) Deleted "Power frequency, oil-insulated generator sealing test" [see 5.28 a) of the.2011 edition]. q) Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Testing Machines (SAC/TC 122). This document was drafted by. Liaoning Instrument Research Institute Co., Ltd., Dandong Market Supervision Affairs Service Center (Dandong Inspection and Testing Center Certification Center), Liaoning Rail Transit Vocational College, Edson (Xiamen) Electronics Co., Ltd., Dandong Aolong Radiation Instrument Group Co., Ltd. Company, Dandong Changying Testing Instrument Co., Ltd., Linyi Zhengda Testing Technology Co., Ltd., Hangzhou Zhigan Technology Co., Ltd., Shandong Luneng Special Equipment Inspection and Testing Co., Ltd., Changsha Deka Technology Co., Ltd., and China Machinery Testing Equipment Co., Ltd. The main drafters of this document are. Yu Zhijun, Zhao Xiaodong, Cai Jing, Lin Junming, Cao Gaofeng, Jiang Shengjie, Cheng Lei, Yu Changjiang, Wang Lin, Hou Wenfeng, Cheng Yalong, Liu Jun, and Ren Xia. The previous versions of this document and the documents it replaces are as follows. First published in.2011 as GB/T 26838-2011; This is the first revision. - Nondestructive testing equipment Portable Industrial X-ray Flaw Detector1 ScopeThis document provides the product classification of portable industrial X-ray flaw detectors and specifies the technical requirements, Inspection rules, marking, packaging, transportation and storage, and descriptions of the corresponding test methods. This document applies to the design, manufacture and maintenance of portable industrial X-ray flaw detectors (hereinafter referred to as X-ray machines) with a tube voltage not exceeding 500 kV. Manufacturing and testing.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies. in this document. GB/T 191 Pictorial markings for packaging, storage and transportation GB/T 9582-2008 Determination of ISO sensitivity, ISO average slope and ISO slope G2 and G4 of photographic industrial radiographic films (Exposure with X-rays and gamma rays) GB/T 12604.2 Nondestructive testing terminology Radiographic testing GB/T 13384 General technical requirements for packaging of electromechanical products GB 18871-2002 Basic standard for protection against ionizing radiation and safety of radiation sources GB/T 25480 Basic environmental conditions and test methods for transportation and storage of instruments GBZ 117 Industrial Flaw Detection Radiation Protection Standard JB/T 6220-2011 Density meter for non-destructive testing instruments - Radiographic flaw detection JB/T 7808 Nondestructive Testing Instruments Industrial X-ray Flaw Detector Main Parameters Series3 Terms and definitionsThe terms and definitions defined in GB/T 12604.2 apply to this document.4 Product Categories4.1 Product Model The model of the X-ray machine should be compiled in the form shown in Figure 1 (the model is determined based on the series, with voltage and current as parameters). ...... |