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GB/T 21837-2023: Practice for electromagnetic examination of ferromagnetic steel wire rope
Status: Valid GB/T 21837: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21837-2023 | English | 249 |
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Practice for electromagnetic examination of ferromagnetic steel wire rope
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GB/T 21837-2023
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| GB/T 21837-2008 | English | 399 |
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Practice for electromagnetic examination of ferromagnetic steel wire rope
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GB/T 21837-2008
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PDF similar to GB/T 21837-2023
Basic data | Standard 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Count Estimation | 12,192 | | Date of Issue | 2023-11-27 | | Date of Implementation | 2024-06-01 | | Older Standard (superseded by this standard) | GB/T 21837-2008 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T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
Foreword
This 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 rope
1 Scope
This 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 documents
The 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 detectors
3 Terms and definitions
The 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 principle
4:1 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
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