GB/T 21837-2023 English PDFUS$249.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21837-2023: Practice for electromagnetic examination of ferromagnetic steel wire rope Status: Valid GB/T 21837: Historical versions
Basic dataStandard ID: GB/T 21837-2023 (GB/T21837-2023)Description (Translated English): Practice for electromagnetic examination of ferromagnetic steel wire rope Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H49 Classification of International Standard: 77.140.65 Word Count Estimation: 12,192 Date of Issue: 2023-11-27 Date of Implementation: 2024-06-01 Older Standard (superseded by this standard): GB/T 21837-2008 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 21837-2023: Practice for electromagnetic examination of ferromagnetic steel wire rope---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.ICS 77:140:65 CCSH49 National Standards of People's Republic of China Replace GB/T 21837-2008 Electromagnetic detection method of ferromagnetic steel wire rope Published on 2023-11-27 2024-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 21837-2008 "Electromagnetic Testing Methods for Ferromagnetic Steel Wire Ropes": Compared with GB/T 21837-2008, except for knot In addition to structural adjustments and editorial changes, the main technical changes are as follows: a) The scope of application of the standard has been changed (see Chapter 1, Chapter 1 of the:2008 edition); b) Delete the relevant provisions on the working principle of AC electromagnetic instruments (see 4:1:1 of the:2008 edition); c) Delete the relevant clauses on the working principle of residual magnetism instruments (see 4:1:4 of the:2008 edition); d) Meaning and use deleted (see Chapter 5 of the:2008 edition); e) Changed the requirements for instruments and added requirements for instrument performance (see 5:1, Chapter 8 of the:2008 edition); f) Changed the requirements for personnel qualifications (see 5:2, 6:2 of the:2008 version); g) Added requirements for test preparation (see 6:1); h) Added requirements for testing environment (see 6:5); i) Added requirements for test reports (see 8:2): Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by the China Iron and Steel Industry Association: This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183): This document was drafted by: National Steel Wire Rope Product Quality Inspection and Testing Center, Luoyang Baikete Technology Development Co:, Ltd:, Ma'anshan Faersheng Technology Co:, Ltd:, Jiangsu Songcheng Industrial Development Co:, Ltd:, Huazhong University of Science and Technology, Shandong Shubote Intelligent Technology Co:, Ltd:, Metallurgical Industrial Information Standards Institute: The main drafters of this document: Chen Chen, Zhang Feng, Chen Jianhao, Sun Yanhua, Wang Lingjun, Ren Cuiying, Chen Yansong, Kang Yihua, Zhang Jiayi, Zhou Lijun, Wang Xiaozhu, Zhang Zhili, Pan Chuyuan, Yang Yuemin, You Feng, Leng Mingjian, Su Diyao, Wang Yong: This document was first published in:2008 and this is the first revision: Electromagnetic detection method of ferromagnetic steel wire rope1 ScopeThis document describes the detection method and method for detecting local damage of ferromagnetic steel wire ropes and changes in metal cross-sectional area using the principles of magnetic flux and magnetic flux leakage: Instrument calibration methods: This document is applicable to the detection of various ferromagnetic steel wire ropes: Electromagnetic nondestructive testing of ferromagnetic steel cables can also be performed with reference to this document: Note: The detection method described in this document is difficult to detect damage at the end of the wire rope and the connection between the ferromagnetic steel, and it is difficult to distinguish the properties of pure metals (brittleness, fatigue, etc:): degradation:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 5616 Non-destructive testing application guidelines GB/T 8706 Wire rope terminology, marking and classification GB/T 9445 Qualification and certification of non-destructive testing personnel GB/T 20737 General terms and definitions for non-destructive testing GB/T 26832 Technical conditions for non-destructive testing instruments wire rope electromagnetic detectors3 Terms and definitionsThe following terms and definitions as defined in GB/T 8706 and GB/T 20737 apply to this document: 3:1 local damage localflaw;LF Discontinuities in the wire rope, such as broken wires, corrosion pits in the wire, deep wire wear, or other degradation of the local physical state of the wire rope: 3:2 Loss of metal cross-sectional area lossofmetaliccross-sectionalarea; LMA A relative measure of material (mass) defects in a specific area of a wire rope: Note: The metal cross-sectional area loss is measured by comparing the detection point with the reference point on the wire rope that symbolizes the maximum metal cross-sectional area (instrument measurement):4 Detection principle4:1 Overview Ferromagnetic wire rope electromagnetic detection instruments can be based on one or more of the principles described in 4:2 and 4:3: One instrument can simultaneously use magnetic flux and magnetic flux leakage detection principle: 4:2 Magnetic flux principle instruments The magnetizing unit (permanent magnet or DC coil) provides constant magnetic flux to magnetize a section of steel wire rope: The total axial magnetic flux in the wire rope can be ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21837-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 21837-2023_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 21837-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21837-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
