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GB/T 29711-2023 English PDFUS$314.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 29711-2023: Non-destructive testing of welds - Ultrasonic testing - Characterization of discontinuities in welds Status: Valid GB/T 29711: Evolution and historical versions
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GB/T 29711-2023: Non-destructive testing of welds - Ultrasonic testing - Characterization of discontinuities in welds---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. ICS 25:160:40 CCSJ33 National Standards of People's Republic of China Replace GB/T 29711-2013 Non-destructive testing of welds Ultrasonic testing Characteristics of discontinuities within the weld (ISO 23279:2017,IDT) Published on 2023-11-27 2024-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General 1 5 Guideline 2 Appendix A (normative) Classification flow chart for indication of discontinuity within welds 5 Appendix B (informative) Directional reflection 7 Appendix C (informative) Basic dynamic waveforms of reflectors 8ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 29711-2013 "Display Characteristics in Non-Destructive Testing of Welds and Ultrasonic Testing of Welds", and is the same as GB/T 29711- Compared with:2013, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Changed the scope and clarified the classification principles for determining burial discontinuity (see Chapter 1, Chapter 1 of the:2013 edition); b) Added terms and definitions (see Chapter 3); c) Added the requirement that the criteria for classification discontinuity be implemented in accordance with the content established in Chapter 5 (see 5:1, 4:1 of the:2013 version); d) Changed the expression of comparing the highest echo amplitude obtained in all directions of the same discontinuity (see 5:3:3, 4:3:3 of the:2013 version); e) The threshold conditions for stage 3 in the flow chart in Appendix A have been changed (see Appendix A, Appendix A of the:2013 version): This document is equivalent to ISO 23279:2017 "Non-destructive testing of welds and ultrasonic testing of internal discontinuity characteristics of welds": Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by China Machinery Industry Federation: This document is under the jurisdiction of the National Welding Standardization Technical Committee (SAC/TC55): This document was drafted by: Shanghai Materials Research Institute, China Special Equipment Testing Research Institute, Jiangsu Fangtian Electric Power Technology Co:, Ltd:, Shandong Rui Xiang Mold Co:, Ltd:, Guoneng Boiler and Pressure Vessel Inspection Co:, Ltd:, Shanghai Survey and Design Institute Co:, Ltd:, State Grid Xinjiang Electric Power Co:, Ltd: The company's Electric Power Research Institute, Chongqing Yuhuang Electric Power Equipment Manufacturing Co:, Ltd:, Guangdong Yuqi Testing Co:, Ltd:, Harbin Welding Research Institute Co:, Ltd:, Guangdong Fuweide Welding Co:, Ltd: The main drafters of this document: Sun Dan, Zheng Hui, Pan Zhixin, Wei Zhongrui, Jiang Jiansheng, Hao Xiaojun, Li Xi, Ma Junpeng, He Cheng, Han Lina, Chen Qingqing, Xia Bingbing, Fan Xingzhao, Wang Bin, Ding Jie, Yuan Keyi, Ouyang Yuheng, Zeng Weibiao, Su Jinhua, Luo Xunqi: This document was first published in:2013 and this is the first revision: Non-destructive testing of welds Ultrasonic testing Characteristics of discontinuities within the weld1 ScopeThis document describes a method for classifying the characteristics of ultrasound indications produced by discontinuities: According to the indicator characteristics, internal discontinuities are divided into Planar and non-planar: This document is applicable to the discontinuity of the weld surface opening after removing the weld reinforcement:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: testing-Acceptancelevels) Note: GB/T 29712-2023 Ultrasonic testing acceptance level for non-destructive testing of welds (ISO 11666:2018, IDT) trasonictesting-Techniques,testinglevels,andassessment) Note: GB/T 11345-2023 Ultrasonic testing technology, testing levels and assessment for non-destructive testing of welds (ISO 17640:2018, IDT)3 Terms and definitionsThere are no terms or definitions to be defined in this document:4 General principlesDiscontinuities are classified as planar or non-planar based on the following parameters: a) Welding technology; b) Discontinuous geometric positions; c) Maximum echo amplitude; d) Directional reflection; e) Echo static waveform (such as A scan); f) Echo dynamic waveform (envelope): Each of the above parameters is considered comprehensively to obtain accurate classification results: As a guide, Figure A:1 specifies a method of classifying internal discontinuities in welds suitable for general applications: Figure A:1 should be related to parameter a) and parameter Number b) should be used in combination and should not be considered individually: The classification process specified in this document is also applicable to the classification of discontinuous openings on the weld surface after removing the weld reinforcement (see Figure 1): ...... |