GB/T 43658.2-2024 English PDF

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GB/T 43658.2-2024: Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X and gamma rays - Part 2: Double wall radiographic inspection
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 43658.2-2024	614	Add to Cart	5 days	Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X and gamma rays - Part 2: Double wall radiographic inspection	Valid

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Basic data

Standard ID: GB/T 43658.2-2024 (GB/T43658.2-2024)
Description (Translated English): Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X and gamma rays - Part 2: Double wall radiographic inspection
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 19.100
Word Count Estimation: 30,370
Date of Issue: 2024-03-15
Date of Implementation: 2024-03-15
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 43658.2-2024: Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X and gamma rays - Part 2: Double wall radiographic inspection

---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 19.100 CCSJ04 National Standards of People's Republic of China Nondestructive testing of pipeline corrosion and deposits X and Gamma ray testing - Part 2.Double wall gamma ray testing (ISO 20769-2.2018, IDT) Released on 2024-03-15 2024-03-15 implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface I Introduction II 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 X-ray detection technology classification 3 5 General Requirements 4 6 Recommended Radiographic Inspection Techniques 5 7 Sensitivity, quality and assessment of radiographic films/digital images 14 8 Measurement of Transillumination Thickness Difference 15 9 Digital image recording, storage, processing and display 16 10 Test report 17 Appendix A (Normative) Minimum Image Quality Value 19 Appendix B (Normative) Using image grayscale to detect transillumination thickness 21 Appendix C (Normative) Determination of basic spatial resolution 23 Reference 26

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 for standardization documents" Drafting. This document is Part 2 of GB/T 43658 Non-destructive testing of pipeline corrosion and deposits - X-ray and gamma-ray testing. GB/T 43658 has published the following parts. --- Part 1.Tangential radiographic testing; --- Part 2.Double wall radiographic testing. This document is equivalent to ISO 20769-2.2018 "Non-destructive testing of pipeline corrosion and deposits - X-ray and gamma ray testing - Part 2 Division. Double-wall radiographic detection. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Standardization of Nondestructive Testing (SAC/TC56). This document was drafted by. Shanghai Institute of Materials Co., Ltd., Hubei Sanjiang Aerospace Jiangbei Mechanical Engineering Co., Ltd., Beijing Aerospace Special Equipment Testing Research and Development Co., Ltd., Aerospace Intelligence Manufacturing (Shanghai) Technology Co., Ltd., Shanghai Aerospace Equipment Manufacturing General Factory Co., Ltd., Ning Poland Labor Safety Technical Service Co., Ltd., Shanghai Space Propulsion Institute. The main drafters of this document are. Jiang Jiansheng, Wang Xiaoyong, Xia Meiling, Ding Jie, Han Lina, Cao Heng, Liu Kai, Huang Yin, Lv Yanda, Xu Wei, Chai Junhui, Ma Jun, Xu Guozhen, Xu Lang, Zhang Xiaolong, and Chen Yiwei.

Introduction

Small-diameter pipes, pressure pipes, boiler drums, pressure vessels and other pipe products are widely used in industry. The inner and outer walls are very susceptible to corrosion damage and may cause the pipeline system to fail. Corrosion and scab formation, actual pipe wall thinning. There is a difference in thickness between the corroded and uncorroded parts, and the corrosion damage is detected by radiographic testing. Compared with other non-destructive testing methods, X-ray testing technology can detect the corrosion of the inner and outer walls of pipes in time due to its high sensitivity and intuitiveness. This is of great significance to ensure the safe operation of pipe fittings. GB/T 43658 is planned to consist of two parts. --- Part 1.Tangential radiography. The purpose is to specify the use of industrial film radiography, computer radiography (CR) and digital Digital detector array (DDA) detects and measures thickness loss in the wall thickness direction on and off the pipe centerline. Tangential detection technology. --- Part 2.Double wall radiographic testing. The purpose is to specify the use of industrial film radiography, computer radiography (CR), digital The Dual Detector Array (DDA) detects and measures in-service material loss inside or outside pipelines that may be caused by corrosion or erosion. Wall X-ray detection technology. This document is the second part of GB/T 43658, which covers the classification of radiographic testing technology, general requirements, recommended radiographic testing technology, It specifies the technology, sensitivity, quality and evaluation of radiographic films/digital images, and digital image recording, storage, processing and display. Nondestructive testing of pipeline corrosion and deposits X and Gamma ray testing - Part 2.Double wall gamma ray testing

1 Scope

This document specifies film and digital radiographic testing that meets testing requirements to obtain satisfactory, economical and reproducible test results. The technology specified in this document is based on basic detection theory and experiments. This document is applicable to the radiographic detection of defects such as pitting corrosion, surface corrosion and erosion caused by steel pipes during service. The term "tube" used in this specification includes, in addition to its conventional meaning, other cylindrical objects, such as small-diameter tubes, pressure tubes, boiler drums and pressure vessels. The detection technology specified in this document is applicable to weld detection of corrosion/erosion defects, and is not applicable to typical defects generated during the welding process. Detection. This document describes methods for evaluating the loss of material inside or outside a pipeline that may be caused by corrosion or erosion. The pipeline may or may not contain Insulation. This document specifies the dual wall inspection techniques for detecting wall thickness loss, including dual wall single image (DWSI) and dual wall dual image (DW-DW) techniques. DI). NOTE. The DWDI described in this document is generally used in conjunction with the tangential radiographic technique defined in ISO 20769-1. This document applies to in-service dual-lens radiography systems using industrial film radiography, computed radiography (CR) and digital array detectors (DDA). Wall X-ray detection technology.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. ISO 11699-1 Industrial radiographic films for non-destructive testing - Part 1.Classification of industrial radiographic film systems (Non-destructive testing - Part 2.Classification of industrial radiographic film systems diography Note. GB/T 19348.1-2014 Industrial radiographic films for non-destructive testing Part 1.Classification of industrial radiographic film systems (ISO 11699- 1.2008,MOD) ISO 11699-2 Non-destructive testing of industrial radiographic films - Part 2.Control of film processing by reference value method (Non-destructive testing of industrial radiographic films - Part 2.Control of film processing by reference value method encevalues) Note. GB/T 19348.2-2003 Non-destructive testing of industrial radiographic films Part 2.Control of film processing using reference value method (ISO 11699-2. 1998,IDT) ISO 16371-1 Non-destructive testing - Industrial computed radiography based on storage phosphor imaging plates - Part 1.Classification of systems 1) EN14784-1 was invalidated in.2006 and replaced by ENISO 16371-1. Note. GB/T 21355-2022 Non-destructive testing Classification of industrial computer radiography testing systems based on storage phosphor imaging plates (ISO 16371-1. ......

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