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GB/T 33643-2022: Non-destructive testing - Test methods for leak detection by means of acoustic emission
Status: Valid GB/T 33643: Evolution and historical versions
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| GB/T 33643-2022 | English | 519 |
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Non-destructive testing - Test methods for leak detection by means of acoustic emission
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GB/T 33643-2022
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| GB/T 33643-2017 | English | 999 |
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Non-destructive testing -- Test methods for leak detection by means of acoustic emission
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GB/T 33643-2017
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PDF similar to GB/T 33643-2022
Basic data | Standard ID | GB/T 33643-2022 (GB/T33643-2022) | | Description (Translated English) | Non-destructive testing - Test methods for leak detection by means of acoustic emission | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Word Count Estimation | 26,237 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 33643-2022: Non-destructive testing - Test methods for leak detection by means of acoustic emission
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Non-destructive testing - Test methods for leak detection by means of acoustic emission
ICS 19.100
CCSJ04
National Standards of People's Republic of China
Replacing GB/T 33643-2017
Nondestructive Testing Acoustic Emission Leak Detection Method
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Personnel Requirements 1
5 Method Outline 1
6 Inspection process specification 4
7 Detection system 5
8 Inspection procedure 6
9 Evaluation of test results 10
10 Inspection records and reports 11
Appendix A (normative) Acoustic emission system performance requirements 13
Appendix B (Informative) Typical Leak Detection Application Case 15
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document replaces GB/T 33643-2017 "Non-destructive Testing Acoustic Emission Leak Detection Method", compared with GB/T 33643-2017,
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
--- Added the content of normative references (see Chapter 2, Chapter 2 of the.2017 edition);
--- Deleted the safety requirements (see Chapter 5 of the.2017 edition);
--- Increased the requirements for the fixation of the sensor (see 7.3.2);
--- Increased the requirements for the protection level of the sensor housing (see 7.3.3);
--- Increased the requirements for measurement parameters (see 7.5);
--- Deleted the requirements for pressure indicating devices (see 8.6 of the.2017 edition).
This document is drafted with reference to ISO 18081.2016 "Non-destructive Testing Acoustic Emission Detection Acoustic Emission Leak Detection Method", and the degree of consistency is
Not equivalent.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed and managed by the National Technical Committee for Standardization of Nondestructive Testing (SAC/TC56).
This document is drafted by. China Institute of Special Equipment Testing, Shanghai Institute of Materials, Anhui Huaxia High-tech Development Co., Ltd.,
Nanjing Boiler and Pressure Vessel Inspection and Research Institute, Beijing Shenghua Xingye Technology Co., Ltd., Shandong Kejie Engineering Inspection Co., Ltd., Beijing Kehai
Hang Seng Technology Co., Ltd.
The main drafters of this document. Zhang Junjiao, Shen Gongtian, Shen Yongna, Ding Jie, Yecheng, Hu Bin, Yu Yue, Wang Ting, Jiang Jun, Liu Shifeng, Li Huan,
Liang Yumei, Duan Qingru, Xiong Qunfeng.
This document was first published in.2017 and this is the first revision.
Nondestructive Testing Acoustic Emission Leak Detection Method
1 Scope
This document describes a leak detection method and result evaluation based on acoustic emission (AE) technology.
This document applies to acoustic emission detection of structures or components that leak due to pressure differences.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 4208 enclosure protection class (IP code)
GB/T 9445 Qualification and Certification of Nondestructive Testing Personnel
GB/T 12604.4 Nondestructive Testing Terminology Acoustic Emission Testing
GB/T 12604.7 Non-destructive testing term leak detection
GB/T 19800 Primary Calibration of Acoustic Emission Detection Transducers for Nondestructive Testing
GB/T 19801 Nondestructive Testing Acoustic Emission Testing Acoustic Emission Sensor Secondary Calibration
GB/T 20737 General Terms and Definitions of Nondestructive Testing
GB/T 27025 General requirements for the competence of testing and calibration laboratories
3 Terms and Definitions
Terms and definitions defined in GB/T 12604.4, GB/T 12604.7 and GB/T 20737 apply to this document.
4 Personnel requirements
Personnel who implement acoustic emission testing in this document shall be qualified and certified in accordance with GB/T 9445 or the system agreed by the parties to the contract.
certificate, and the employer or its agent shall carry out on-the-job training and operation authorization.
5 Summary of the method
5.1 The phenomenon of acoustic emission caused by leakage
The fluid stored in the closed equipment leaks out through the leakage hole due to the pressure difference.
Gasification and collision of solid particles produce mechanical waves that propagate outward, that is, the phenomenon that leakage produces acoustic waves, also known as the generalized acoustic emission phenomenon. Book
The method detects the leakage of closed equipment and determines the leakage location by collecting and analyzing the acoustic emission signal.
Figure 1 shows the schematic diagram of the acoustic emission signal generated by leakage and the principle of acoustic emission leakage detection. The continuous acoustic emission signal generated by leakage can be regarded as a
significantly enhanced background noise. During the leakage process, the transient changes of pressure fluctuations near the leakage point are different, and the resulting acoustic emission signal has
have a wider spectral range.
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