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GB/T 5248-2016: Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 5248-2016	English	359	Add to Cart	4 days [Need to translate]	Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube
GB/T 5248-2008	English	599	Add to Cart	3 days [Need to translate]	Copper and copper alloy-seamless tubes-eddy current testing method
GB/T 5248-1998	English	319	Add to Cart	3 days [Need to translate]	Copper and copper alloy-seamless tubes-eddy current testing method
GB/T 5248-1985	English	RFQ	ASK	3 days [Need to translate]	Copper and copper alloy--Seamless tubes--Eddy current testing method

GB/T 5248-2016: Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube

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Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube ICS 77.040.99 H26 National Standards of People's Republic of China Replacing GB/T 5248-2008 Copper and copper alloy seamless tube eddy current testing method Electromagnetic (eddy-current) examinationof 2016-08-29 released 2017-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 5248-2008 "Copper and copper alloy seamless tube eddy current testing method". Compared with GB/T 5248-2008, the main The technical changes are as follows. - the introduction of "standard penetration depth" of the definition and its calculation, add Appendix D, delete the "wall thickness 0.20mm ~ 6.0mm" specification; --- remove flat bottom hole as a standard artificial defect requirements; --- increase the light pipe and the internal thread of the flaw detection specifications and the corresponding standard artificial defects hole, the size of the vertical U-groove; - a sample tube and its production drawings with on-line inspection of standard artificial defects (see 5.6); - Increased manual detection of rotary flaw detection performance indicators (see 4.6.5 and Table 3); --- clear online testing. daily test to adjust the sensitivity (manual), regular test evaluation performance to manual automatic (dynamic) get on. This standard is proposed by China Nonferrous Metals Industry Association. This standard is owned by the National Committee for the Standardization of Nonferrous Metals (SAC/TC243). This standard drafting unit. China Nonferrous Metals Industry Nondestructive Testing Center, Guilin Lijia Metal Co., Ltd., Beijing Nonferrous Metal Research Research Institute, Zhongluo Luoyang Copper Co., Ltd., Jinlong Precision Copper Group Co., Ltd., Jiangyin Xinhua Hong Copper Co., Ltd., Suzhou Longjun Nondestructive Testing Equipment Co., Ltd., in the color Obert Copper and Aluminum Co., Ltd., Jiangxi Nile Copper Co., Ltd. The main drafters of this standard. Zhang Guangji, Wang Yueming, Xi Guoping, Wang Xiaoyan, Zhang Luncao, Zhang Boan, Zhang Ying, Li Yang, Lou Dongge, Chen Hua, Wang Nan, Wang Xiangdong, Liu Aikui, Qin Liyun, Liu Jinlong, Luo Qiliang, Jiang Yexin, Zhang Xijun. This standard replaced the previous version of the standard release. GB/T 5248-1985, GB/T 5248-1998, GB/T 5248-2008. Copper and copper alloy seamless tube eddy current testing method

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 φ3mm ~ φ160mm 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 signaltonoiseratio 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 differenceofinduced-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 feed-througheddycurrenttestingmethod A method of eddy current testing using a through vortex detection coil. 2.6 Point eddy current testing method probecoileddycurrenttestingmethod A method of eddy current testing using point vortex detection coil. 2.7 Standard penetration depth standarddepthofpenetration 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 ...