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GB/T 39239-2020: Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities
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| GB/T 39239-2020 | English | 759 |
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Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities
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GB/T 39239-2020
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Basic data | Standard ID | GB/T 39239-2020 (GB/T39239-2020) | | Description (Translated English) | Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 19.100 | | Word Count Estimation | 41,452 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-06-01 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39239-2020: Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities
---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 Ultrasonic testing Discontinuous characteristics and quantification)
ICS 19.100
J04
National Standards of People's Republic of China
Non-destructive testing ultrasonic testing
Discontinuous characteristics and quantification
2020-11-19 released
2021-06-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Principle of discontinuous representation 1
5 Pulse echo technology 2
6 Penetration technology 7
Appendix A (Normative Appendix) Evaluation of multiple displays 9
Appendix B (Normative Appendix) Discontinuous classification 11
Appendix C (Normative Appendix) Iterative Quantitative Technology 18
Appendix D (Normative Appendix) Evaluation of discontinuous dimensions based on mathematical calculations 23
Appendix E (informative appendix) Special quantitative techniques 27
Appendix F (Informative Appendix) Maximum Echo Height Quantitative Technology 29
Appendix G (Normative Appendix) Probe Mobile Length Measurement Technology 31
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to modify and adopt ISO 16827.2012 "Characteristics and quantification of discontinuities in ultrasonic testing for non-destructive testing".
The technical differences between this standard and ISO 16827.2012 and the reasons are as follows.
---Regarding normative reference documents, this standard has made adjustments with technical differences to adapt to my country's technical conditions and adjustments
It is concentratedly reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are as follows.
● Replace ISO 5577 with GB/T 12604.1 which is equivalent to adopting international standards (see Chapter 2 and Chapter 3);
● Replace ISO 23279 with GB/T 29711 equivalent to the international standard (see Chapter 2, B.1.1);
● Replace ISO 16810 (see Chapter 2, 4.1, 5.1) with GB/T 39240 modified to adopt international standards;
● Replace ISO 16823 (see Chapter 2, 6.1) with GB/T 39241 modified to adopt international standards;
● Replace ISO 16811 (see Chapter 2, 5.6, 5.7.1, F.1.1, F.2.1) with GB/T 39242 which is modified to adopt international standards.
--- Added a chapter "Terms and Definitions" (see Chapter 3).
--- Added "Overview", "Quantitative Technology Classification" and "Other Instructions" (see 6.5.1, 6.5.2, 6.5.3).
--- "Roughness Ra=6.3μm" and "Ra=12.5μm" are modified to "roughness not exceeding 6.3μm" and "roughness not exceeding 12.5μm" (see 4.2).
---Modified the formula (D.4), the "Ⅰ, Ⅱ" in the original international standard formula is not a parameter or variable, but only represents the probe moving direction as shown in Figure 3.
Therefore, it should not appear in the formula. A note has been added after this standard formula (D.4).
This standard has made the following editorial changes.
---Adjusted the order of Appendix C~Appendix G according to the order in which the text is cited.
This standard was proposed and managed by the National Standardization Technical Committee for Nondestructive Testing (SAC/TC56).
Drafting organizations of this standard. Shanghai Materials Research Institute, China General Nuclear Power Engineering Co., Ltd., Eintick Testing Technology (Shanghai) Co., Ltd., China
Power Research Institute of Zhejiang Electric Power Co., Ltd., Wuhan Zhongke Innovation Technology Co., Ltd., Yantai CIMC Raffles Offshore Engineering Co., Ltd.
Company, Changzhou Ultrasonic Electronics Co., Ltd., Shandong Ruixiang Mould Co., Ltd., State Grid Shanghai Electric Power Research Institute.
The main drafters of this standard. Jiang Jiansheng, Ding Jie, Zhang Yifeng, Wang Sen, Zhu Congbin, Zhang Rui, Long Shaojun, Zhao Zhoufeng, Lu Kuangda, Lin Guanghui,
Wang Zicheng, Jin Lei, Xiao Xiao, Wei Zhongrui, Ma Jianmin, Luo Defense.
Non-destructive testing ultrasonic testing
Discontinuous characteristics and quantification
1 Scope
This standard specifies the general principles and techniques for characterizing and quantifying the detected discontinuities to ensure that the discontinuities are assessed according to the applicable acceptance criteria.
This standard applies to the discontinuous characterization and quantification of materials specified in GB/T 39240.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 12604.1 Non-destructive testing term Ultrasonic testing (GB/T 12604.1-2005, ISO 5577.2000, IDT)
GB/T 29711 Non-destructive testing of welds. Ultrasonic testing of welds. Display features (GB/T 29711-2013, ISO 23279.2010, IDT)
GB/T 39240 General rules for nondestructive testing and ultrasonic testing (GB/T 39240-2020, ISO 16810.2012, MOD)
GB/T 39241 Non-destructive testing Ultrasonic testing penetration technology (GB/T 39241-2020, ISO 16823.2012, MOD)
GB/T 39242 Non-destructive testing ultrasonic testing sensitivity and range setting (GB/T 39242-2020, ISO 16811.2012, MOD)
ISO 16828 Non-destructive testing Ultrasonic testing Ultrasonic diffraction acoustic time technology testing and evaluation methods
3 Terms and definitions
The terms and definitions defined in GB/T 12604.1 apply to this document.
4 Principle of discontinuous representation
4.1 Overview
The characterization of discontinuity refers to the characteristics that need to be determined to evaluate the discontinuity according to the acceptance criteria, including.
a) Determine the basic parameters of the ultrasonic signal (echo height, ultrasonic propagation time).
b) Determine the basic shape and orientation.
c) Take any of the following methods to quantify.
1) Measure one or more dimensions (area/volume), if it cannot be measured due to conditions, follow the method of 2);
2) Measure certain parameters according to the acceptance criteria, such as echo height that can represent discontinuous dimensions.
d) Positioning, such as the distance from the detection surface or other discontinuities.
e) Determine other parameters or characteristics required for evaluation.
f) Feature evaluation, such as cracks or slag inclusions, but it is necessary to fully understand the inspected part and its manufacturing process before effective evaluation.
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