HOME   Cart(0)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (18 Oct 2025)

GB/T 23904-2025 English PDF

US$379.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 23904-2025: Non-destructive testing - Test method for ultrasonic testing by surface wave
Status: Valid

GB/T 23904: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 23904-2025English379 Add to Cart 4 days [Need to translate] Non-destructive testing - Test method for ultrasonic testing by surface wave Valid GB/T 23904-2025
GB/T 23904-2009English229 Add to Cart 3 days [Need to translate] Non-destructive testing -- Test method for ultrasonic testing by surface wave Valid GB/T 23904-2009

PDF similar to GB/T 23904-2025


Standard similar to GB/T 23904-2025

GB/T 23901.5   GB/T 23901.4   GB/T 23901.3   GB/T 23902   GB/T 23901.1   

Basic data

Standard ID GB/T 23904-2025 (GB/T23904-2025)
Description (Translated English) Non-destructive testing - Test method for ultrasonic testing by surface wave
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 19.100
Word Count Estimation 18,185
Date of Issue 2025-05-30
Date of Implementation 2025-09-01
Older Standard (superseded by this standard) GB/T 23904-2009
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 23904-2025: Non-destructive testing - Test method for ultrasonic testing by surface wave

---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 Replace GB/T 23904-2009 Nondestructive testing - ultrasonic surface wave testing method Released on 2025-05-30 2025-09-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Detection system 1 5 Test preparation 2 6 Detection sensitivity 2 7 Detection 4 8 Records 5 9 Supplementary testing 6 10 Test records and reports 6 Appendix A (Informative) Surface wave rectangular notch comparison test block 7 Appendix B (Informative) Surface wave flat bottom hole comparison test block 8 Appendix C (Informative) Determination of single detection range of surface waves 9 Reference 10

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 replaces GB/T 23904-2009 "Non-destructive testing - Ultrasonic surface wave test methods" and is consistent with GB/T 23904-2009. In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2009 edition); b) Personnel qualifications have been deleted (see Chapter 4 of the.2009 edition); c) The requirements for instruments have been changed (see 4.1, 5.1 of the.2009 edition); d) The requirements for probes have been changed (see 4.2, 5.2 of the.2009 edition); e) The requirements for preparing the test process specifications have been changed (see 5.1, 7.1 of the.2009 edition); f) Deleted the detection principle (see Chapter 6 of the.2009 edition); g) Added general provisions on detection sensitivity (see 6.1); h) Added comparison test block type (see 6.3.1); i) The sensitivity adjustment method of the surface wave rectangular notch comparison test block has been changed (see 6.3.2.1, 8.2 of the.2009 edition); j) Added the sensitivity adjustment method for surface wave flat bottom hole comparison test block (see 6.3.2.2); k) The probe frequency and corresponding rectangular notch number of the rectangular notch comparison block method have been changed (see Table 1, Table 1 of the.2009 edition); l) Added the probe frequency and corresponding flat bottom hole number of the flat bottom hole comparison test block method (see Table 2); m) The drawing of distance-amplitude curve (DAC curve) was modified (see 6.4, 8.3 of the.2009 edition); n) The detection sensitivity has been changed (see 6.5, 8.4 of the.2009 edition); o) Changed the requirements for the probe scanning path (see 7.1, 7.3 of the.2009 edition); p) The scan coverage has been changed (see 7.4, 9.3 of the.2009 edition); q) Added defect location (see 8.2); r) Added supplementary testing (see Chapter 9); s) The test records and reports have been changed (see Chapter 10, Chapter 11 of the.2009 edition); t) The “surface wave rectangular notch comparison test block” was changed (see Appendix A, Appendix A of the.2009 edition). 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 Jinyi Testing Technology Co., Ltd., Shanghai Materials Research Institute Co., Ltd., Dongfang Boiler Group of Dongfang Electric Corporation Co., Ltd., Ningbo Special Equipment Inspection and Research Institute, Jiangsu University of Science and Technology, Jiaxing Special Equipment Inspection and Testing Institute, Jiangsu Gongchang Roller Co., Ltd., Shanghai Xinzhenyuan Electronic Technology Co., Ltd., Jiangsu Special Equipment Safety Supervision and Inspection Institute, Ningbo Yongchuang Testing Technology Co., Ltd. Technology Co., Ltd., Baoshan Iron & Steel Co., Ltd., Beijing Nuclear Construction Hengxin Testing Technology Co., Ltd., Wuhan Zhongke Innovation Technology Co., Ltd. company. The main drafters of this document are. Song Huanan, Jiang Jiansheng, Luo Yundong, Ding Jie, Chen Xiaoming, Li Binbin, Liu Bingxia, Li Fushan, Feng Xifeng, Peng Shanbai, Tan Yunhua, Zhang Xiaolong, Peng Hui, Wang Changan, Yan Yu, Zhao Yajun, Ding Xiaoying, Ding Xiaoping, Han Lina, Hu Lichen, Zhao Yanyan, Gu Jianping, Song Yimin, Shen Kaifeng, and Shen Yanwen. This document was first published in.2009 and this is the first revision. Nondestructive testing - ultrasonic surface wave testing method

1 Scope

This document specifies the general method of contact pulse reflection ultrasonic surface wave testing for the detection of surface imperfections in metallic materials. This document is applicable to workpieces with a surface roughness Ra not greater than 6.3μm and a thickness not less than 5 times the wavelength of the surface wave used for detection. The curvature radius of the workpiece such as a cylinder shall not be less than 22.5mm. Note. The wavelength of the surface wave used for detection is calculated based on the theoretical surface wave sound velocity of the workpiece/the nominal frequency of the surface wave probe used for detection.

2 Normative references

The contents of the following documents constitute 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. GB/T 12604.1 Nondestructive testing terminology Ultrasonic testing GB/T 27664.1 Non-destructive testing - Performance and inspection of ultrasonic testing equipment - Part 1.Instrument GB/T 27664.2 Non-destructive testing - Performance and inspection of ultrasonic testing equipment - Part 2.Probes GB/T 27664.3 Non-destructive testing - Performance and inspection of ultrasonic testing equipment - Part 3.Combined equipment

3 Terms and definitions

The terms and definitions defined in GB/T 12604.1 apply to this document. 4.Detection system 4.1 Instrument Ultrasonic instruments should comply with the provisions of GB/T 27664.1 and have the following characteristics. ---The operating frequency includes the frequency range of 0.5MHz~10MHz; ---With a continuously adjustable gain of more than 80dB, the minimum gain step is no more than 1dB; ---The linear deviation of the time base is not more than 0.5%, and the linear deviation of the amplitude is not more than 5%. 4.2 Probe The probe should comply with the provisions of GB/T 27664.2 and meet the following requirements. ---Can form surface waves through refraction of longitudinal waves on the detection surface; ---The chip area should not be greater than 500mm2, and the length of any side of the rectangular chip should not be greater than 25mm; ---The frequency range should be 1MHz~5MHz; ---The deflection angle should not be greater than 2°. When scanning curved surfaces, the gap between the measured surface and the bottom surface of the probe should not be greater than 0.5mm, otherwise the bottom surface of the probe should be ground to match the curved surface. 4.3 System Performance The time base linearity, gain linearity, physical condition and appearance should be checked regularly. The verification method, verification cycle and performance parameter indicators should be

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23904-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23904-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 23904-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23904-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 23904-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 23904-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.