GB/T 23902-2021 English PDF

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GB/T 23902-2021: Non-destructive testing - Ultrasonic testing - Time-of-flight diffraction technique as a method for detection and sizing of discontinuities
Status: Valid

GB/T 23902: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23902-2021	414	Add to Cart	4 days	Non-destructive testing - Ultrasonic testing - Time-of-flight diffraction technique as a method for detection and sizing of discontinuities	Valid
GB/T 23902-2009	799	Add to Cart	4 days	Non-destructive testing -- Ultrasonic examination -- Time-of-flight diffraction technique as a method for detection and sizing of discontinuities	Obsolete

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GB/T 23901.3   GB/T 23901.2   GB/T 23901.4   GB/T 23904   GB/T 23901.1   

Basic data

Standard ID: GB/T 23902-2021 (GB/T23902-2021)
Description (Translated English): Non-destructive testing - Ultrasonic testing - Time-of-flight diffraction technique as a method for detection and sizing of discontinuities
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Word Count Estimation: 22,241
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 23902-2021: Non-destructive testing - Ultrasonic testing - Time-of-flight diffraction technique as a method for detection 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-Time-of-flight diffraction technique as a method for detection and sizing of discontinuities ICS 19.100 CCSJ04 National Standards of People's Republic of China Replace GB/T 23902-2009 Non-destructive testing Ultrasonic testing Ultrasonic diffraction acoustic time technology detection and evaluation method (ISO 16828.2012, IDT) Released on 2021-05-21 2021-12-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ 1 Scope 1 2 Normative references 1 3 Terms, definitions, symbols and abbreviations 2 4 Overview 3 5 Personnel qualifications 5 6 Equipment requirements 5 7 Device Setup Program 7 8 Data interpretation and analysis 9 9 Detection and quantification of complex geometric shapes 12 10 Limitations of technology 12 11 TOFD test without data record 13 12 Inspection process procedures 14 13 Test report 14 Appendix A (informative) Reference test block 15 Appendix NA (informative) Compared with GB/T 23902-2009, new terms, definitions, symbols, and abbreviations in this document 16 Appendix NB (informative) Contents deleted from this document compared with GB/T 23902-2009 17 Appendix NC (informative) Contents of this document modified compared with GB/T 23902-2009 18 Reference 19

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" Drafting. This document replaces GB/T 23902-2009 "Non-destructive Testing Ultrasonic Testing Ultrasonic Diffraction Acoustic Time Technical Testing and Evaluation Methods" Compared with GB/T 23902-2009, the main technical changes are as follows. a) Some terms and definitions, symbols, and abbreviations have been added (see Appendix NA); b) Deleted part of the content (see Appendix NB); c) Some parameter requirements have been changed (see Appendix NC). The translation method used in this document is equivalent to ISO 16828.2012 "Non-destructive testing, ultrasonic testing, ultrasonic diffraction, acoustic time technical testing and evaluation. Price Method." The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows. ---GB/T 9445-2015 qualification and certification of non-destructive testing personnel (ISO 9712.2012, IDT); ---GB/T 39240-2020 General Principles of Ultrasonic Testing for Nondestructive Testing (ISO 16810.2012, MOD); ---GB/T 39242-2020 Ultrasonic testing sensitivity and range setting for non-destructive testing (ISO 16811.2012, MOD). This document has made the following editorial changes. ---Added an informative appendix NA. Compared with GB/T 23902-2009, this document adds new terms, definitions, symbols, and abbreviations; ---Informative appendix NB is added, and the contents of this document are deleted compared with GB/T 23902-2009; ---Added informative appendix NC, the content of this document compared with GB/T 23902-2009. This document was proposed and managed by the National Standardization Technical Committee for Nondestructive Testing (SAC/TC56). Drafting organizations of this document. Shuode (Beijing) Technology Co., Ltd., Shanghai Institute of Materials, Guangdong Shantou Ultrasonic Electronics Co., Ltd. Acoustic Instrument Branch, Ayntech Technology (Shanghai) Co., Ltd., China State Construction and Civil Engineering Co., Ltd., China Aviation Industry Corporation North Beijing Great Wall Metrology and Testing Technology Research Institute, Baker Hughes Testing and Control Technology (Shanghai) Co., Ltd., China Special Equipment Testing and Research Institute, China Institute of Metrology. The main drafters of this document. Xiang Yong, Huang Yin, Ma Jun, Wang Lili, Peng Chun, Zhou Lijun, Fu Rulong, Chen Xinbo, Liu Yongfu, Zhang Xuetao, Zhong Dehuang, Shen Gongtian, Yang Ping. This document was first published in.2009, and this is the first revision. Non-destructive testing Ultrasonic testing Ultrasonic diffraction acoustic time technology detection and evaluation method

1 Scope

This document specifies the general principles of the Ultrasonic Time-of-Sound Diffraction (TOFD) method. This document is applicable to low alloy and carbon steel components Discontinuous detection. This document is also applicable to other types of materials, provided that the number of components must be fully considered when using ultrasonic diffraction acoustic technology. What shape and material acoustic properties and detection sensitivity. This document is generally applicable to discontinuous testing in materials included in ISO 16810, including welds, which can be used as a reference. select The reason for this method is its clear ultrasound probe position and scanning direction. Unless otherwise specified in the cited documents, this document applies to the minimum requirements. Unless expressly stated otherwise, this document applies to the following levels specified by ISO 16811. ---1 category, no restrictions; - Category 2 and Category 3, the specified restrictions apply. Note 1.Chapter 9 has similar instructions. For category 4 and category 5, product testing requires special process procedures. Note 2.Chapter 9 has similar instructions. Note 3.ISO 10863 describes the use of TOFD for weld inspection technology. Note 4.The relevant acceptance documents are given in ISO 15626.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. ISO 9712 Non-destructive testing personnel qualification and certification (Non-destructivetesting-Qualificationandcertifi- cationofNDTpersonnel) ISO 16810 Non-destructive testing-Ultrasonic testing-General principles) ISO 16811 non-destructive testing ultrasonic testing sensitivity and range setting (Non-destructive testing-Ultrasonic testing-Sensitivityandrangesetting) EN12668-1 Non-destructive testing Ultrasonic testing equipment performance and inspection Part 1.Instruments (Non-destructive testing- Characterizationandverificationofultrasonicexaminationequipment-Part 1.Instruments) EN12668-2 Non-destructive testing Ultrasonic testing equipment performance and inspection Part 2.Probe (Non-destructive testing- Characterizationandverificationofultrasonicexaminationequipment-Part 2.Probes) EN12668-3 Non-destructive testing. Performance and inspection of ultrasonic testing equipment. Part 3.Combined equipment (Non-destructive testing-Characterizationandverificationofultrasonicexaminationequipment-Part 3.Combined equipment) ......

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