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GB/T 34637-2017: Non-destructive testing -- Test methods for bubble leak detection
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| GB/T 34637-2017 | English | 199 |
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Non-destructive testing -- Test methods for bubble leak detection
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GB/T 34637-2017
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Basic data | Standard ID | GB/T 34637-2017 (GB/T34637-2017) | | Description (Translated English) | Non-destructive testing -- Test methods for bubble leak detection | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 19.100 | | Word Count Estimation | 10,183 | | Date of Issue | 2017-09-29 | | Date of Implementation | 2018-04-01 | | 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 | GB/T 34637-2017: Non-destructive testing -- Test methods for bubble leak detection---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.
Non-destructive testing - Test methods for bubble leak detection
ICS 19.100
J04
National Standards of People's Republic of China
Nondestructive testing of bubble leak detection methods
2017-09-29 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that some of this document may be patentable. The release of this document
The agency does not assume responsibility for identifying these patents.
This standard by the National Standardization Technical Committee nondestructive testing (SAC/TC56) and focal point.
This standard drafting unit. China Special Equipment Inspection and Research Institute, the State Nuclear Power Station Service Technology Co., Ltd., Shanghai Thai Division Detection Technology
Limited, Nanjing Boiler and Pressure Vessel Inspection Institute.
The main drafters of this standard. Shen Koten, Zhang Jiao, Gao Guangxing, King for the Section, Yan River, Qian Zhengyu, industry into, Zhang Yiming, Hu Zhenlong, Wanqiang.
Nondestructive testing of bubble leak detection methods
1 Scope
This standard specifies the bubble leak detection method and the results of evaluation.
This standard applies to the system and in the use of closed equipment or parts of the bubble leak detection.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 9445 non-destructive testing personnel qualification and certification
GB/T 11533 standard logarithmic visual acuity chart
GB/T 12604.7 Non-destructive testing term leak detection
GB/T 20737 non-destructive testing common terms and definitions
GB/T 20967 non-destructive testing visual inspection General
3 Terms and definitions
GB/T 12604.7 and GB/T 20737 defined terms and definitions apply to this document.
4 Method summary
Bubble leak detection technology, is the use of the pressure difference generated on both sides of the test object, the bubble in the low pressure side of the solution to detect the vent
Leakage method, with easy, fast, environmentally friendly and low-cost features. The sensitivity of the bubble leak detection method is affected by pressure difference, pressurized gas
And foaming solution. Bubble leak detection methods include the following two techniques.
a) direct pressurization technology, the inside of the equipment to be inspected is directly pressurized with gas, and a foaming solution is directly applied to the outside of the equipment or the equipment to be inspected
Directly immersed in the solution of the detection method, according to the formation of gas leakage bubbles through the liquid to determine whether the seized equipment leaks and leaks
The location of the hole
b) Vacuum cover technology, suitable for the detection of leakage can not be directly pressurized equipment leak detection method. In the seized equipment shell local area facilities
Plus bubble solution, and then through the vacuum hood so that the two sides of this local area to form a certain pressure difference, if leakage occurs, will be in
Bubbles are generated on the low pressure side to determine the site of the leak.
5 safety requirements
Users using this standard should establish safety guidelines before testing. Safety guidelines should include at least.
a) The inspectors shall comply with the safety requirements of the test site, wear protective overalls and wear protective clothing according to the requirements of the test site
equipment;
b) When operating at high altitude, the necessary protective measures should be taken into consideration when considering the factors such as the fall of personnel and equipment and equipment;
c) Under extreme conditions such as low temperature and high temperature, the personnel should consider frostbite, scald, heat stroke and other factors and take the necessary protection
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