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GB/T 26641-2021 English PDF (GB/T 26641-2011)

GB/T 26641-2021_English: PDF (GB/T26641-2021)
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GB/T 26641-2021English260 Add to Cart 0--9 seconds. Auto-delivery Non-destructive testing -- Magnetic memory testing -- General requirements Valid GB/T 26641-2021
GB/T 26641-2011English439 Add to Cart 3 days [Need to translate] Non-destructive testing -- Magnetic memory testing -- General principles Obsolete GB/T 26641-2011


BASIC DATA
Standard ID GB/T 26641-2021 (GB/T26641-2021)
Description (Translated English) Non-destructive testing -- Magnetic memory testing -- General requirements
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 19.100
Word Count Estimation 17,117
Date of Issue 2021-12-31
Date of Implementation 2022-07-01
Older Standard (superseded by this standard) GB/T 26641-2011
Quoted Standard ISO 9712; ISO/TS 18173; ISO 24497-2
Adopted Standard ISO 24497-1-2020, IDT
Drafting Organization China Special Equipment Inspection and Research Institute
Administrative Organization National Nondestructive Testing Standardization Technical Committee
Regulation (derived from) National Standard Announcement No. 17 of 2021
Proposing organization National Nondestructive Testing Standardization Technical Committee (SAC/TC 56)
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration
Summary This standard specifies the terms and definitions of non-destructive testing (NDT) of metal magnetic memory (MMM) technology, as well as the general technical requirements for the application of this method. The non-destructive testing techniques specified in this standard have the following purposes: to determine the inhomogeneity of the magnetomechanical state of ferromagnetic objects, to detect the degree of stress concentration caused by defects and the inhomogeneity of metal microstructure boundaries; to determine the location with surface magnetic field distortion for further Perform microstructural analysis and/or non-destructive testing and evaluation; early damage diagnosis of inspected objects to evaluate their structural life; rapid classification of new and used inspection objects by magnetic heterogeneity for further inspection; magnetic Memory combined with other nondestructive testing methods or techniques (ultrasonic testing, X-ray testing, etc.) can quickly detect the location of the most likely defect,

BASIC DATA
Standard ID GB/T 26641-2011 (GB/T26641-2011)
Description (Translated English) Non-destructive testing. Magnetic memory testing. General principles
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 19.100
Word Count Estimation 11,128
Date of Issue 2011-06-16
Date of Implementation 2012-03-01
Quoted Standard GB/T 9445; GB/T 12604.6; GB/T 12604.10
Drafting Organization China Special Equipment Inspection and Research Institute
Administrative Organization National Standardization Technical Committee NDT
Regulation (derived from) Announcement of Newly Approved National Standards No. 9 of 2011
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies requirements for ferromagnetic metal materials, components and welds the general principles of magnetic memory testing. Austenitic stainless steel components and welds under certain conditions, magnetic, also refer to the standard magnetic memory testing. This standard is about specific products, equipment, materials, magnetic memory testing standards or the development of written operating instructions provide guidance. Except as specifically provided otherwise, the contents of the standard minimum requirements.


GB/T 26641-2021 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 19.100 CCS J 04 GB/T 26641-2021 / ISO 24497-1:2020 Replacing GB/T 26641-2011 Non-destructive testing - Magnetic memory testing - General requirements (ISO 24497-1:2020, Non-destructive testing - Magnetic memory testing - Part 1: Vocabulary and general requirements, IDT) ISSUED ON: DECEMBER 31, 2021 IMPLEMENTED ON: JULY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the PRC. Table of Contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Terms and definitions ... 6  4 General requirements ... 9  5 Inspected object ... 10  6 Test equipment ... 11  7 Preparation for testing ... 12  8 Test ... 13  9 Test report ... 15  10 Safety requirements and personnel qualification ... 16  Annex A (Informative) Example of stray field distribution of an indication ... 18  Bibliography ... 20  Foreword This document is drafted in accordance with GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents". This document replaces GB/T 26641-2011 "Non-destructive testing - Magnetic memory testing - General principles". Compared with GB/T 26641-2011, in addition to structural adjustment and editorial changes, the main technical changes are as follows: a) Modify the scope (see Clause 1; Clause 1 of the 2011 edition); b) Modify and add normative references (see Clause 2; Clause 2 of the 2011 edition); c) Modify and add terms (see Clause 3; Clause 3 of the 2011 edition); d) Modify the method summary (see Clause 4; Clause 5 of the 2011 edition); e) Modify the description of inspected object (see Clause 5; Clause 7 of the 2011 edition); f) Modify the requirements for test equipment (see Clause 6; Clause 8 of the 2011 edition); g) Modify the description of preparation for testing (see Clause 7; Clause 7 of the 2011 edition); h) Modify the evaluation parameters and procedures; expand the previous normal component or tangential component into a three-dimensional component (see 8.1; Clause 10 of the 2011 edition); i) Add the acquisition method and value criterion for gradient intermediate value and gradient coefficient threshold (see 8.2 and 8.3); j) Modify the test record and report (see Clause 9; Clause 11 of the 2011 edition); k) Modify personnel qualification requirements (see Clause 10; Clause 4 of the 2011 edition). This document is identical to ISO 24497-1:2020 "Non-destructive testing - Magnetic memory testing - Part 1: Vocabulary and general requirements". The following minimal editorial change has been made to this document: - In order to harmonize with the existing standards, change the standard name to "Non-destructive testing - Magnetic memory testing - General requirements". Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing authority of this document shall not be held responsible for identifying any or all such patent rights. This document 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). Drafting organizations of this document: China Special Equipment Inspection and Research Institute, Eddysun (Xiamen) Electronics Co., Ltd., Anhui Huaxia High Science and Tech Development Co., Ltd., Tsinghua University, China Aerodynamics Research and Development Center, Jiaxing Special Equipment Inspection and Testing Institute, Chengdu University of Information Technology, Beijing University of Technology, Central Research Institute of Building and Construction Co., Ltd., Shandong Kejie Engineering Testing Co., Ltd., Luoyang LYC Bearing Co., Ltd. Main drafters of this document: Hu Bin, Wang Baoxuan, Shen Yongna, Shen Gongtian, Lin Junming, Li Luming, Li Huan, Wei Dong, Pan Jinping, Hu Yun, Zhang Yiliang, Gao Guangxing, Zhang Junjiao, Zhang Di, Liang Yumei, Chen Cuili. The previous editions of this document and the documents it replaces are as follows: - It was first issued as GB/T 26641-2011 in 2011. This is the first revision. Non-destructive testing - Magnetic memory testing - General requirements 1 Scope This document specifies terms and definitions for non-destructive testing (NDT) by the technique of metal magnetic memory (MMM) as well as general requirements for application of this technique of the method. This NDT technique specified in this document has the following objectives: - determination of the heterogeneity of the magneto-mechanical state of ferromagnetic objects, detection of defect stress concentration and boundaries of metal microstructure heterogeneity; - determination of locations with magnetic stray field aberrations for further microstructural analysis and/or non-destructive testing and evaluation; - early diagnostics of fatigue damage of the inspected object and evaluation of its structural life time; - quick sorting of new and used inspection objects by their magnetic heterogeneity for further testing; - efficiency improvement of non-destructive testing by combining magnetic memory with other NDT methods or techniques (ultrasonic testing, x-ray, etc.) by fast detection of the most probable defect locations; - quality control of welded joints of various types and their embodiment (including contact and spot welding). See ISO 24497-2 for details of this application. 2 Normative references The contents of the following documents, through normative references in this text, constitute indispensable provisions of this document. Among them, for dated references, only the edition corresponding to that date applies to this document. For undated references, the latest edition (including all amendments) applies to this document. ISO 9712 Non-destructive testing - Qualification and certification of personnel Note: GB/T 9445-2015 Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712:2012, IDT) ......


GB/T 26641-2011 Non-destructive testing. Magnetic memory testing. General principles ICS 19.100 J04 National Standards of People's Republic of China General NDT magnetic memory Issued on. 2011-06-16 2012-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released Foreword This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard non-destructive testing by the National Standardization Technical Committee (SAC/TC56) centralized. This standard was drafted. China Special Equipment Inspection and Research Institute, Edson (Xiamen) Electronics Co., Ltd., Tsinghua University, Beijing industrial Science, Beijing Institute of Aeronautical Materials, Beijing University of Aeronautics and Astronautics, North China Electric Power Research Institute, Division of detecting Haitai Technology Co., Ltd. Shanghai Institute of Materials. Drafters of this standard. Shen Tian Gong, Hu Bin, Chen Gang, Jimmy Lam, Li Lu Ming, Zhang Yiliang, high Kwong Hing, Xu north, according to mine silver, Huxian Long, Jinyu Fei. General NDT magnetic memory 1 Scope This standard specifies the general principle of ferromagnetic metal materials, components and magnetic memory testing of welds. Austenitic stainless steel piece and weld under certain conditions, magnetic, can also refer to the standard magnetic memory. This standard provides guidance on specific products, equipment, materials, magnetic memory testing standards or written operating instructions making. In addition there are special Special provisions, the contents of this standard are minimum requirements. 2 Normative references The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 9445 NDT personnel qualification and certification (ISO 9712) GB/T 12604.6 Terminology for nondestructive testing Eddy current testing GB/T 12604.10 Terminology for nondestructive testing magnetic memory 3 Terms and Definitions Terms and definitions GB/T 12604.6 and GB/T 12604.10 defined apply to this document. 4 qualified personnel According to the present standards for testing personnel should be GB/T 9445 requirements or provisions relating to the competent authorities to obtain the appropriate NDT people Issued or recognized accreditation body member of the eddy currents or electromagnetic detection level qualifications, in the corresponding qualification level specified testing. 5 Summary of Method 5.1 magnetic memory phenomenon In a weak magnetic field, the ferromagnetic metal material of environmental factors. the role (such as load, temperature, machining or collision, etc.), Local area irreversible residual magnetic phenomena, the performance after the removal of the external environmental factors, the local magnetic field of the ferromagnetic material surface becomes Of the remains. 5.2 Magnetic Memory Testing principle Under conditions without applying artificial excitation field, the use of sensors measuring the distribution of surface magnetic field detection element, the mutant signal obtained by the magnetic field To discover the presence of stress may be concentrated on the subject member, the material deterioration or material injury site. Figure 1 is a schematic diagram of magnetic memory testing. The sensor scanning the subject to obtain the surface magnetic field component (commonly the normal component, May also be a multi-dimensional components) changes through appropriate data processing and analysis, to discover damage or stress concentration areas that exist on the subject member. ......

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