GB/T 12604.12-2021 English PDF

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GB/T 12604.12-2021: Non-destructive testing - Terminology - Part 12: Radiation methods for industrial computed tomography
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Basic data

Standard ID: GB/T 12604.12-2021 (GB/T12604.12-2021)
Description (Translated English): Non-destructive testing - Terminology - Part 12: Radiation methods for industrial computed tomography
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Word Count Estimation: 25,214
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 12604.12-2021: Non-destructive testing - Terminology - Part 12: Radiation methods for industrial computed tomography

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Non-destructive testing -- Terminology -- Part 12: Radiation methods for industrial computed tomography ICS 19:100 CCSJ04 National Standards of People's Republic of China Replacing GB/T 34365-2017 NDT terminology Part 12: Industrial X-ray Computed Tomography Inspection (ISO 15708-1:2017, Non-destructive testing-Radiation methods for Published on 2021-12-31 2022-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 Appendix A (informative) This document deletes the term 6 of GB/T 34365-2017 Appendix B (informative) The terms added in this document compared with GB/T 34365-2017 9 Appendix C (informative) Terms modified in this document compared with GB/T 34365-2017 10 Appendix D (informative) Changes in the structure of this document compared to ISO 15708-1:201711 Appendix E (informative) Technical differences between this document and ISO 15708-1:2017 and their reasons 13 Appendix F (informative) Terms added in this document compared to ISO 15708-1:2017 14 Index 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 is part 12 of GB/T 12604 "Nondestructive Testing Terminology": GB/T 12604 has released the following parts: --- GB/T 12604:1 Nondestructive testing term ultrasonic testing; ---GB/T 12604:2 Non-destructive testing term radiographic testing; --- GB/T 12604:3 Non-destructive testing terminology penetrant testing; ---GB/T 12604:4 Nondestructive testing term acoustic emission testing; --- GB/T 12604:5 Non-destructive testing term magnetic particle testing; --- GB/T 12604:6 Non-destructive testing term eddy current testing; --- GB/T 12604:7 Non-destructive testing term leak detection; --- GB/T 12604:8 Non-destructive testing term neutron testing; ---GB/T 12604:9 Non-destructive testing term infrared thermal imaging; ---GB/T 12604:10 Non-destructive testing term magnetic memory testing; ---GB/T 12604:11 Non-destructive testing term X-ray digital imaging testing; --- GB/T 12604:12 Non-destructive testing terminology Part 12: Industrial ray computed tomography testing: This document replaces GB/T 34365-2017 "Non-destructive testing terminology industrial computer tomography (CT) testing", and Compared with GB/T 34365-2017, in addition to structural adjustment and editorial modification, the main technical changes are as follows: a) Some terms are deleted (see Appendix A); b) Added some terms (see Appendix B); c) Some terms have been changed (see Appendix C): This document is modified to adopt ISO 15708-1:2017 "Non-Destructive Testing Radiographic Computed Tomography Testing - Part 1: Terminology": Compared with ISO 15708-1:2017, this document has more structural adjustments: Appendix D gives this document and ISO 15708-1: 2017 chapter number comparison list: Compared with ISO 15708-1:2017, this document has many technical differences: In the outer margins of the clauses involved, vertical The straight single line ( ) is marked: See Appendix E for a list of these technical differences and their reasons: Increased compared to ISO 15708-1:2017 terms, see Appendix F: The following editorial changes have been made to this document: --- Changed the standard name to be consistent with the existing series of standards; --- Added informative Appendix A~Appendix F; --- Added index for ease of use: 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 was drafted by: Chongqing University, Shanghai Institute of Materials Science and Technology, Ningbo Branch of China Academy of Ordnance Science, Chongqing Zhenshi Technology Co:, Ltd: Co:, Ltd:, Tsinghua University, Beijing Guhong Technology Co:, Ltd:, CRRC Qiqihar Vehicle Co:, Ltd:, Hubei Sanjiang Aerospace Jiangbei Mechanical Engineering Co:, Ltd: Co:, Ltd:, Aerospace Intelligent Manufacturing (Shanghai) Technology Co:, Ltd:, and CITIC Dicastal Co:, Ltd: The main drafters of this document: Wang Jue, Ni Peijun, Jiang Jiansheng, Duan Xiaojiao, Lu Yanping, Ding Jie, Xiao Yongshun, Zuo Xin, Zhang Weiguo, Guo Zhimin, Tan Hui, Zhou Feng, Liu Rong, Zou Yongning, Duan Liming, Chen Yan, Wang Xiaoyong, Xu Guozhen, Liu Jun, Ye Qing, Song Quanzhi: The previous versions of this document and its superseded documents are as follows: --- This document was first published as GB/T 34365-2017 in:2017;

Introduction

Non-destructive testing technology is an indispensable tool for human industrialization and social development, and it is also an important tool for product quality control and ensuring the safety of equipment and facilities: The main means of full operation, it also provides feedback on the production process: Nondestructive testing utilizes the properties of heat, force, sound, light, electricity and magnetism of matter, Detect, locate and measure defects or anomalies in materials and components, evaluate their performance, organization and integrity: The application of non-destructive testing covers machinery manufacturing, chemical industry, medicine and medical treatment, energy, transportation, metallurgy, construction, water conservancy, marine engineering Engineering, weapons, aviation, aerospace, nuclear industry, hygienic food, smuggling and anti-terrorism and public safety and other fields: There are many methods and techniques of non-destructive testing, which are widely used: A common term that establishes the basis for various methods and techniques of nondestructive testing, is The primary task of various non-destructive testing standardization organizations at home and abroad to carry out non-destructive testing standardization activities: GB/T 12604 "Non-destructive testing technique "Language" is the basic and general standard to guide the standardization activities of non-destructive testing in my country: GB/T 12604 "Nondestructive Testing Terminology" aims to establish A term generally applied to a standardization document for non-destructive testing, consisting of twelve parts: --- GB/T 12604:1 Nondestructive testing term ultrasonic testing; ---GB/T 12604:2 Non-destructive testing term radiographic testing; --- GB/T 12604:3 Non-destructive testing terminology penetrant testing; ---GB/T 12604:4 Nondestructive testing term acoustic emission testing; --- GB/T 12604:5 Non-destructive testing term magnetic particle testing; --- GB/T 12604:6 Non-destructive testing term eddy current testing; --- GB/T 12604:7 Non-destructive testing term leak detection; --- GB/T 12604:8 Non-destructive testing term neutron testing; ---GB/T 12604:9 Non-destructive testing term infrared thermal imaging; ---GB/T 12604:10 Non-destructive testing term magnetic memory testing; ---GB/T 12604:11 Non-destructive testing term X-ray digital imaging testing; --- GB/T 12604:12 Non-destructive testing terminology Part 12: Industrial ray computed tomography testing: This document is part 12 of GB/T 12604, which defines the terminology of industrial radiography computed tomography (CT): this time Revise GB/T 34365-2017 and incorporate it into the GB/T 12604 terminology document system, clarify commonly used terms and definitions, and There is a basis for formulating industrial CT inspection methods and product documents, so as to give full play to the basic and general support function of terminology documents, and to better promote NDT trade, exchange and technical cooperation: NDT terminology Part 12: Industrial X-ray Computed Tomography Inspection

1 Scope

This document defines the terminology used in industrial radiographic computed tomography (CT) inspection: The terminology provided in this document applies to CT examinations: and other radiation imaging related fields:

2 Normative references

There are no normative references in this document:

3 Terms and Definitions

3:1 absorption photoelectric absorption The interaction between photons and matter, incident photons are absorbed by atoms of matter, and electrons are emitted: NOTE: See Compton Scattering (3:6): 3:2 angularincrement Angular separation between adjacent CT projections (3:15): 3:3 artefact; artifact The image information that appears on the CT image (3:13) does not match the physical characteristics of the measured object: 3:4 beam hardening spectrum hardening The change in the energy spectrum of a polychromatic beam due to the faster decay of low-energy photons as it passes through an object: NOTE: See goblet effect (3:20): 3:5 beamwidth beamwidth; BW The effective width of the beam emitted by the ray source and received by a single detector at a specific position of the measured object and in the direction of the vertical ray: Note: According to the geometric relationship, it is a function constructed by converting the influence of the ray source and the detector on the imaging to the center of the image reconstruction: For the mathematical expression, see the formula (1): BW= d2 [a(M-1)]2 (1) where: M --- geometric magnification, M=SDD/SOD; d --- detector width; a --- ray source focus size: ......

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