GB/T 5248-2016Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube (English PDF)
铜及铜合金无缝管涡流探伤方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 29, 2016
Implementation date
July 1, 2017
Scope
GB/T 5248-2016 is the English-translated version of 铜及铜合金无缝管涡流探伤方法.
GB/T 5248-2016 is the Chinese standard "Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube". Its scope clause reads: This standard specifies the copper and copper alloy seamless pipe through the type and point (rotation) eddy current testing methods, comparative samples, equipment, Procedures and results.
This standard applies to the diameter of phi3mm ~ phi160mm straight tube and coil surface and near surface defects of the eddy current testing, flaw detection depth Refer to Appendix D. Other specifications of the pipe can refer to the implementation. Its clauses include terms and definitions.
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Document preview — GB/T 5248-2016
National Standard of the People's Republic of China
- ICS
- 77.040.99
- Classification
- H 26
- Replacing
- GB/T 5248-2008
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 terms and definitions
- 2.3 Signal to noise ratio
- 2.4 Zero potential
- 2.5 Through the eddy current testing method
- 2.6 Point eddy current testing method
- 2.7 Standard penetration depth
1 Scope
This standard specifies the copper and copper alloy seamless pipe through the type and point (rotation) eddy current testing methods, comparative samples, equipment,
Procedures and results.
This standard applies to the diameter of phi3mm ~ phi160mm straight tube and coil surface and near surface defects of the eddy current testing, flaw detection depth
Refer to Appendix D. Other specifications of the pipe can refer to the implementation.
2 terms and definitions
The following terms and definitions apply to this document.
2.1 (Brass) online eddy current testing method on-lineeddycurrenttesting
The use of electromagnetic induction in the copper tube surface and near the surface of the principle of eddy current, the production process of the whole plate or the whole volume of the flaw detection method.
2.2 (Brass) off-line eddy current testing method off-lineeddycurrenttesting
The use of electromagnetic induction in the copper tube surface and near the surface of the principle of eddy current, the production process of copper alone set the flaw detection process
One by one or by root detection method.
2.3 Signal to noise ratio
The ratio of the amplitude of the defect signal to the maximum noise signal amplitude at the output of the eddy current detector.
2.4 Zero potential
The difference between the induced voltage formed between the windings by the differential connection of the detection coil. Detection of the coil when the specimen is loaded with zero potential.
Detection of the coil when there is no test piece for the no-load zero potential.
2.5 Through the eddy current testing method
A method of eddy current testing using a through vortex detection coil.
2.6 Point eddy current testing method
A method of eddy current testing using point vortex detection coil.
2.7 Standard penetration depth
In eddy current testing, the depth at which the eddy current decreases to 1/e (about 37%) of the surface eddy current density is called the standard penetration depth. eddy […]
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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.
Referenced standards
Cited by
- GB/T 8891-2025Copper and copper alloy tubes for heat radiators
- GB/T 23609-2023Seamless copper alloy tube for water desalting applications
- GB/T 26024-2021Seamless copper and copper alloys tube for valves on air-conditioning and refrigeration system
- GB/T 20928-2020Seamless inner grooved copper tube
- GB/T 26291-2020Seamless copper-nickel alloys tube for ships
- GB/T 26302-2020Seamless copper and copper alloy tube for heat pipe
Similar standards
Editions of GB/T 5248
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 5248-2016 | Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube | current edition | Current |
| GB/T 5248-2008 | Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube | previous edition | Superseded |
This page sells the current edition, GB/T 5248-2016. Earlier editions are listed for reference only.
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