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GB/T 10121-2008: Steel products -- Method for magnetic particle inspection of tower sample
Status: Valid GB/T 10121: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 10121-2008 | English | 259 |
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Steel products -- Method for magnetic particle inspection of tower sample
| Valid |
GB/T 10121-2008
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| GB/T 10121-1988 | English | 399 |
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Steel products--Method for magnetic particle inspection of tower sample
| Obsolete |
GB/T 10121-1988
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PDF similar to GB/T 10121-2008
Basic data | Standard ID | GB/T 10121-2008 (GB/T10121-2008) | | Description (Translated English) | Steel products -- Method for magnetic particle inspection of tower sample | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H26 | | Classification of International Standard | 77.040.20 | | Word Count Estimation | 11,149 | | Date of Issue | 2008-09-11 | | Date of Implementation | 2009-05-01 | | Older Standard (superseded by this standard) | GB/T 10121-1988 | | Quoted Standard | GB/T 12604.5; GB/T 15822.2; JB/T 8290; JIS G 0565 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.16 (Total No.129) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard provides a summary of the magnetic particle inspection method, seized face equipment, magnetic materials, measuring performance test systems and sensitivity, preparation of samples, inspection conditions and procedures, magnetizing current type, magnetic field strength, assessment and acceptance of test results, inspection personnel, artificial standard test block, artificial standard test tablets. This standard applies to testing of ferromagnetic steel tower or near the surface hairline and other defects. | GB/T 10121-2008: Steel products -- Method for magnetic particle inspection of tower sample---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.
Steel products. Method for magnetic particle inspection of tower sample
ICS 77.040.20
H26
National Standards of People's Republic of China
Replacing GB/T 10121-1988
Magnetic steel tower hairline test method
Posted 2008-09-11
2009-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 10121-1988 "steel tower hairline magnetic particle inspection method."
This standard 10121-1988 major changes compared to GB/T as follows.
--- Fluorescent magnetic particle weighing from "can be weighed separately" with no less than "4g";
--- Delete Terms equipment and instruments;
--- White light illumination by the 2000lx to 1000lx;
--- Black light intensity from not less than 800μW/cm
2 to not less than 1000μW/cm
2;
--- "The magnetic field strength must be controlled within a reasonable tolerance range, usually ± 25%" to "current intensity control in ± 10%";
--- Increase "equivalent diameter D = circumference/π";
--- Increase Normative Appendix "A type of artificial standard specimen testing methods."
The Standard Appendix A and Appendix B are normative appendix.
The standard proposed by China Iron and Steel Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee.
This standard is mainly drafted by. Dongbei Special Steel Group Co., Ltd., Maanshan Iron & Steel Company Limited.
The main drafters of this standard. Dong Zehua, Kang Ge, Li Hongming, Liu Xueying, Vincent Chan, Hou Jiang.
This standard was first released in 1988.
Magnetic steel tower hairline test method
1 Scope
The standard provides a summary of the magnetic particle inspection method of measuring performance test equipment, magnetic materials, and the sensitivity of the test system, specimen
Preparation, testing conditions and procedures, type of magnetizing current, magnetic field strength, the test results of evaluation and acceptance, inspection personnel, labor standard test block, people
Workers standard test pieces and the like.
This standard applies to testing of ferromagnetic steel pyramid surface or near-surface hairline and other defects.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 12604.5 Terminology for nondestructive testing - Magnetic particle testing
GB/T 15822.2 destructive testing - Magnetic particle testing - Part 2. Detection media (GB/T 15822.2-2005, ISO 9934-2.
2002, IDT)
JB/T 8290 magnetic particle inspection machine
JISG0565 ferromagnetic magnetic particle inspection method and magnetic display classes (Methodformagneticparticletestingof
ferromagneticmaterialsandclassificationofmagneticparticleindication)
3 Terms and Definitions
Terms and definitions GB/T 12604.5 established apply to this standard.
Principle 4
Magnetic particle inspection method is based on ferromagnetic materials due to changes in continuity, such as the presence of defects such as hairline, the magnetic field lines can be distorted this original
Management. If such defects located on the surface or near the surface of the sample is magnetized, the magnetic field lines in the surface distortion, this state is referred to as "leakage terminology
Flux. "When there is leakage flux, spreading the powder will be adsorbed at the hairline, and to ensure that under appropriate lighting conditions, or by the naked eye
Aid of not more than 10 times the magnifying glass to gather this kind of hairline.
5 Summary of test method
5.1 Inspection Steps
Test specimens shall be magnetized sample magnetization should be imposed powder GB/T 15822.2 standard requirements for any powder should gather into
Line detailed observation.
5.2 magnetization
5.2.1 The specimen shall be direct electrical tower magnetized. Due to the presence of defects in the object is magnetized, it will cut off the normal path of the magnetic field lines
A leakage flux.
5.2.2 Since the hairline distributed along the axial direction of the steel, so the samples to the steel tower circumferentially magnetized, the induced magnetic field lines perpendicular to the hairline
Straight direction, magnetic particle inspection.
5.2.3 field should have sufficient strength to be able to display those hairline rejected, but not too strong, as well as causing excessive aggregation of magnetic local production
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