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Test methods for hydride orientation fraction of nuclear grade zirconium and zirconium alloy tubes
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Basic data
| Standard ID | GB/T 38913-2020 (GB/T38913-2020) |
| Description (Translated English) | Test methods for hydride orientation fraction of nuclear grade zirconium and zirconium alloy tubes |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | H24 |
| Classification of International Standard | 77.040.99 |
| Word Count Estimation | 10,138 |
| Date of Issue | 2020-06-02 |
| Date of Implementation | 2021-04-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 38913-2020: Test methods for hydride orientation fraction of nuclear grade zirconium and zirconium alloy tubes
---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.
(Nuclear grade zirconium and zirconium alloy pipe hydride orientation factor detection method)
ICS 77.040.99
H24
National Standards of People's Republic of China
Nuclear grade zirconium and zirconium alloy pipe hydride orientation factor
Detection method
2020-06-02 release
2021-04-01 Implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Nonferrous Metals Industry Association.
This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
This standard was drafted by. National Nuclear Baozi Zirconium Co., Ltd., National Nuclear Zirconium Hafnium Physical and Chemical Testing Co., Ltd., Baoji Titanium Industry Co., Ltd., West
Ministry of New Zirconium Nuclear Material Technology Co., Ltd., Xi'an Hantang Analysis Testing Co., Ltd., Baoji Titanium New Material Testing Technology Center Co., Ltd.,
Non-ferrous Metal Technology and Economic Research Institute.
The main drafters of this standard. Zhang Tianguang, Li Gang, Zhang Mengni, Wei Xinmin, Li Xianjun, Shi Wen, Li Fan, Wang Songmao, Yang Yan, Li Xiaoning, Yue Qiang,
Zhang Jiangfeng.
Nuclear grade zirconium and zirconium alloy pipe hydride orientation factor
Detection method
Warning---Persons using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible safety issues
question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the conditions prescribed by the relevant national regulations.
1 Scope
This standard stipulates the method for detecting the orientation factor of hydride of nuclear grade zirconium and zirconium alloy pipes.
This standard is applicable to the determination of the orientation factor of hydride of nuclear grade zirconium and zirconium alloy pipes through hydrogen permeation or gas permeation of autoclaves.
2 Normative references
The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 13298 Metal microstructure inspection method
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Hydride
A compound formed by hydrogen and a more metallic metal.
3.2
Radial hydride
On a certain inspection section of zirconium and zirconium alloy pipes, the radial angle (θ) between the hydride and the pipe is not greater than the product standard and technical conditions
Or the requirements of the demand side, and its actual length is not less than 15μm hydride.
3.3
Hydride count
On a certain inspection section of zirconium and zirconium alloy pipes, the number of hydrides whose actual length is not less than 15μm is counted.
3.4
Radial hydride count
Nθ
On a certain inspection section of zirconium and zirconium alloy pipes, the number of radial hydrides (3.2) is counted.
3.5
Hydride orientation factor
Fθn
The ratio of the number of radial hydrides (3.4) to the number of hydrides (3.3) on a certain inspection section of zirconium and zirconium alloy pipes.
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