GB/T 25757-2010Non-destructive testing - Test methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes (English PDF)
无损检测 钢管自动漏磁检测系统综合性能测试方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 23, 2010
Implementation date
October 1, 2011
Scope
GB/T 25757-2010 is the English-translated version of 无损检测 钢管自动漏磁检测系统综合性能测试方法.
GB/T 25757-2010 is the Chinese standard "Non-destructive testing - Test methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes".
Its scope clause reads: This standard specifies the test content ferromagnetism of seamless and welded steel pipe (except submerged arc welded) Automatic magnetic flux leakage testing of system performance And test methods.
This standard applies to the use of the comparative samples specified in this standard under field conditions to test the detection of magnetic flux leakage pipe automatic detection system Fully Sealing properties.
This standard also applies to thick ends or with steel pipe couplings, oil leakage magnetic detection system with automatic comprehensive performance test tube.
Ferromagnetic steel bar automatic magnetic flux leakage testing system performance tests also can refer to this standard. Its clauses include terms and definitions; test conditions.
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Document preview — GB/T 25757-2010
National Standard of the People's Republic of China
- ICS
- 19.100
- Classification
- J 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Test Conditions
1 Scope
This standard specifies the test content ferromagnetism of seamless and welded steel pipe (except submerged arc welded) Automatic magnetic flux leakage testing of system performance
And test methods.
This standard applies to the use of the comparative samples specified in this standard under field conditions to test the detection of magnetic flux leakage pipe automatic detection system Fully
Sealing properties.
This standard also applies to thick ends or with steel pipe couplings, oil leakage magnetic detection system with automatic comprehensive performance test tube.
Ferromagnetic steel bar automatic magnetic flux leakage testing system performance tests also can refer to this standard.
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 12606 pipe magnetic flux leakage inspection method (GB/T 12606-1999, eqv ISO 9402. 1989, ISO 9598. 1989)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1 Pipe automatic magnetic flux leakage detection system
MFL detection means after the ferromagnetic material is magnetized, inner and outer surfaces due to material defects or internal leakage magnetic field and the formation of defects on the surface, through
Excessive leakage field to detect defects discovered a method for non-destructive testing of defects.
Pipe automatic magnetic flux leakage detection system is divided in the circumferential direction (transverse) detector or axial (longitudinal) detecting means commonly used to two kinds of axial and circumferential
Combining means in order to achieve the test results more comprehensive and accurate aim.
3.2 Degaussing demagnetize
Ferromagnetic steel tubes in magnetic flux leakage detection system automatically by an axial magnetic field magnetization, the presence of residual magnetic field in the tube after leaving the detection system,
Residual magnetic field pipe to eliminate the operation of said degaussing.
Pipe automatic transverse magnetic flux leakage detection system is usually configured with degaussing device.
4 Test Conditions
4.1 pairs of test line requirements
Since entering the pipe until it is fully automatic by magnetic flux leakage inspection system during its axis should be in a straight line.
4.2 Working speed detection system
The test tube automated magnetic flux leakage detection system should be at normal operating speed, the operating speed of change can not exceed 10% test
To record keeping magnetizing current, speed detection, signal gain, suspicious waste electrical signals and alarms sentenced equality argument.
4.3 Other test conditions
Other test conditions shall comply with GB/T 12606 of.
GB/T 26641-2021 | GB/T 23901.5-2019 | GB/T 23906-2009 | GB/T 25758.3-2010 | GB/T 25758.2-2010 | GB/T 25758.1-2010 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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