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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 45377-2025: Non-destructive testing - Long-range inspection of above-ground pipelines and plant piping using guided wave testing with axial propagation Status: Valid
Basic dataStandard ID: GB/T 45377-2025 (GB/T45377-2025)Description (Translated English): Non-destructive testing - Long-range inspection of above-ground pipelines and plant piping using guided wave testing with axial propagation Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J04 Classification of International Standard: 19.100 Word Count Estimation: 18,125 Date of Issue: 2025-03-28 Date of Implementation: 3/28/2025 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 45377-2025: Non-destructive testing - Long-range inspection of above-ground pipelines and plant piping using guided wave testing with axial propagation---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 Standard of the People's Republic of China Non-destructive testing of ground pipelines and factory pipeline axial Long distance guided wave detection (ISO 18211.2016, MOD) Released on 2025-03-28 2025-03-28 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Principles 2 5 Factors affecting the implementation of ultrasonic guided wave testing 3 6 Testing Equipment 4 7 Testing Procedure 5 8 Test data quality requirements 5 9 Detection 6 10 Supplementary testing 7 11 Test Report 8 Appendix A (Informative) Selection of guided wave modes 9 Reference 12ForewordThis 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 modified to adopt ISO 18211.2016 "Non-destructive testing of surface pipelines and plant pipelines - axial long-distance guided wave testing". This document has the following structural adjustments compared to ISO 18211.2016. --- Chapter 3, 3.14~3.17 correspond to 3.15~3.18 in Chapter 3 of ISO 18211.2016, and 3.14 is deleted; --- Chapters 4 to 11 correspond to Chapters 5 to 12 of ISO 18211.2016, and Chapter 4 is deleted. The technical differences between this document and ISO 18211.2016 and their reasons are as follows. --- Changed the term "total pipe wall cross-section TCS" to "cross-section" (see 3.3), To adapt to my country's national conditions; --- Changed the English equivalent of the term "datumpoint" to "datum" (see 3.5) to eliminate ambiguity; --- The term "secondary mode" (see 3.14 of ISO 18211.2016) has been deleted and is not cited in the entire text; --- Deleted the personnel requirements (see Chapter 4 of ISO 18211.2016) to adapt to my country's technical conditions and increase operability. The following editorial changes were made to this document. --- Added the reference document GB/T 31211.1 (see 6.4) on the performance verification method of waveguide equipment to increase the operability of the verification. 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. China National Nuclear Power Operation Management Co., Ltd., Shanghai Institute of Materials Co., Ltd., Jiangsu Special Equipment Safety Supervision Co., Ltd. Inspection and Research Institute, Shanghai Lanya Petrochemical Equipment Testing Institute Co., Ltd., Wuhan Zhongke Innovation Technology Co., Ltd., Suzhou Tian Hezhongdian Electric Power Engineering Technology Co., Ltd., Ningbo Special Equipment Inspection and Research Institute. The main drafters of this document are. Li Qiuda, Shang Xianhe, Jiang Jiansheng, Ding Jie, Zhang Yanbing, Tian Li, Lin Guanghui, Luo Jie, Wen Jie, Ma Xiangdong, Deng Zhixin, Zhang Wei, Fei Zhisong, Liu Shun, Xu Bo, Han Zhixiong, Wu Xiao, Wu Mingliang, Huang Kai, Wu Xuegang, Li Binbin, Wang Xin, Liu Dejun, Hu Minglei, Ge Lianwei. Non-destructive testing of ground pipelines and factory pipeline axial Long distance guided wave detection1 ScopeThis document specifies the use of ultrasonic guided waves propagating axially along the entire circumferential section to measure the surface pipelines and plant areas made of carbon steel and low alloy steel. A method for long-distance detection of corrosion or erosion damage in pipelines. This document applies to the following types of pipes. --- Ground coating pipeline; --- Ground pipelines with insulation layer; ---Coated pipelines in factory areas; ---Insulated pipes in the factory area. Note. Guided wave testing (GWT) is a rapid method for checking surface pipelines, plant pipelines and pipelines with casings crossing roads, and for determining areas of possible corrosion or erosion. The pipeline section with casing (without asphalt or plastic coating) crossing the road is the section where the outer wall of the pipeline is not Special buried pipes subject to soil pressure, this document applies to such pipes. Other types of pipes are not included in the above list due to their increased complexity. Use dedicated detection methods.2 Normative referencesThis document has no normative references.3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 axialdirection Along the major axis of the pipe. 3.2 Along the circumference of the pipe. 3.3 cross-section The area between the inner diameter and the outer diameter of the pipe on a plane perpendicular to the axis of the pipe. 3.4 Cross-section change The equivalent change in cross-section calculated assuming that the indication is entirely caused by the change in cross-section (3.3). 3.5 Datum A reference point used to report the test position (3.15) and to establish a correlation between the test result and the corresponding position of the test object. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 45377-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 45377-2025_English as soon as possible, and keep you informed of the progress. 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