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JJG 746-2024 English PDF

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JJG 746-2024: Ultrasonic Flaw Detectors
Status: Valid

JJG 746: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 746-2024English579 Add to Cart 5 days [Need to translate] Ultrasonic Flaw Detectors Valid JJG 746-2024
JJG 746-2004English719 Add to Cart 3 days [Need to translate] Verification Regulation for Ultrasonic Flaw Detectors Obsolete JJG 746-2004
JJG 746-1991English319 Add to Cart 3 days [Need to translate] Verification Regulation for Ultrasonic Inspection Instruments Obsolete JJG 746-1991

Basic data

Standard ID JJG 746-2024 (JJG746-2024)
Description (Translated English) Ultrasonic Flaw Detectors
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 28,250
Date of Issue 2024-06-14
Date of Implementation 2024-12-14
Issuing agency(ies) State Administration for Market Regulation
Summary This standard applies to the initial verification, subsequent verification and in-use inspection of type A display pulse ultrasonic flaw detectors (including digital ultrasonic flaw detectors).

JJG 746-2024: Ultrasonic Flaw Detectors

---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.
National Metrology Verification Regulations of the People's Republic of China Ultrasonic flaw detector Released on 2024-06-14 Implementation on 2024-12-14 The State Administration for Market Regulation issued Ultrasonic flaw detector calibration procedures Replaces JJG 746-2004 Responsible unit. National Acoustic Metrology Technical Committee Main drafting unit. China National Institute of Metrology Participating in the drafting. Hubei Institute of Metrology and Testing Technology Jilin Institute of Metrology This regulation is entrusted to the National Acoustic Metrology Technical Committee for interpretation. The main drafters of this regulation are. Yang Ping (China Institute of Metrology) Tian Qi (China National Institute of Metrology) Xing Guangzhen (China National Institute of Metrology) Participating drafters. Yao Qiuping (Hubei Institute of Metrology and Testing Technology) Fang Facheng (Jilin Institute of Metrology)

Table of contents

Introduction (II) 1 Scope(1) 2 References(1) 3 Terminology and units of measurement (1) 3.1 Terms and definitions (1) 3.2 Units of measurement (3) 4 Overview(3) 5 Metrological performance requirements (3) 5.1 Stability after preheating (3) 5.2 Receiving performance requirements (3) 5.3 Transmission performance requirements (4) 6 General technical requirements (4) 6.1 Signs and information (4) 6.2 Appearance and structure (4) 7 Measuring instrument control (4) 7.1 Verification conditions (4) 7.2 Verification Items (5) 7.3 Verification methods (6) 7.4 Inspection during use (12) 7.5 Processing of test results (12) 7.6 Verification cycle (13) Appendix A Format of the inner pages of the verification certificate and verification result notification (14) Appendix B Examples of Evaluation of Measurement Uncertainty (18) Appendix C In-use Inspection (21)

Introduction

JJF1001-2011 "General metrological terms and definitions", JJF1002-2010 "National metrological verification procedures The JJF1059.1-2012 “Evaluation and Expression of Uncertainty in Measurement” together constitute the basis for the formulation of this regulation. Series specifications. This regulation is revised with reference to EN12668-1.2010 "Non-destructive testing - Characterization and verification of ultrasonic inspection equipment - Part 1 Part 1.Instruments (English version), EN12668-3.2011 Non-destructive testing - Characterization and verification of ultrasonic examination equipment ENISO 22232.1.2020 Non-destructive testing - Ultrasonic testing Characterization and verification of equipment - Part 1.Instruments (English version), GB/T 27664.1-2011 Nondestructive testing of ultra- Performance and inspection of ultrasonic testing equipment Part 1.Instruments" and GB/T 27664.3-2011 "Non-destructive testing of ultrasonic Performance and verification of testing equipment Part 3.Combined equipment. This regulation replaces JJG 746-2004 Ultrasonic Flaw Detector. Compared with JJG 746-2004, the main technical changes are as follows. a) Added terms and definitions; b) Deleted the horizontal linearity error, attenuator attenuation error, vertical linearity error, electrical noise level, maximum use Verification items such as sensitivity, flaw detection sensitivity margin, scanning range and resolution; c) Updated the metrological performance requirements and test methods for dynamic range verification items; d) Added amplifier frequency response, transmission energy leakage suppression, transmission pulse after blind area, equivalent input noise Acoustic, attenuator error, amplitude linearity error, time base linearity error, transmitting pulse voltage, pulse rise time, pulse Metrological performance requirements and test methods for calibration items such as duration and pulse repetition frequency. The previous versions of this regulation are as follows. ---JJG 746-2004. Ultrasonic flaw detector calibration procedures

1 Scope

This regulation applies to the initial verification of type A display pulse ultrasonic flaw detectors (including digital ultrasonic flaw detectors). Subsequent verification and in-use inspection.

2 References

This specification refers to the following documents. JJF1001-2011 General metrological terms and definitions JJF1034-2020 Acoustic Metrology Terms and Definitions JJF1059.1-2012 Evaluation and Expression of Measurement Uncertainty GB/T 3102.7 Acoustic quantities and units GB/T 27664.1-2011 Performance and inspection of ultrasonic testing equipment for non-destructive testing Part 1.Instrument GB/T 27664.3-2012 Performance and inspection of ultrasonic testing equipment for non-destructive testing Part 3.Combination equipment EN12668-1.2010 Characterization and verification of ultrasonic inspection equipment for non-destructive testing Part 1.Instrument equipment-Part 1.Instruments) EN12668-3.2010 Characterization and verification of ultrasonic inspection equipment for non-destructive testing Part 3.Combined equipment equipment-Part 3.Combined equipment) equipment-Part 1.Instruments) For any referenced document with a date, only the version with the date is applicable to this Regulation; for any referenced document without a date, The latest version (including all amendments) shall apply to this regulation.

3 Terminology and units of measurement

3.1 Terms and Definitions The following terms and definitions defined in JJF1001-2011, JJF1034-2020 and JJF1059.1-2012 apply to For use in this procedure. 3.1.1 Ascope The display screen of ultrasonic testing instruments (including ultrasonic flaw detectors and ultrasonic diagnostic instruments) is based on the ultrasonic probe receiving The reflected pulse signal amplitude is the ordinate, and the ultrasonic wave propagation time is the abscissa, showing the image of the ultrasonic wave on the propagation path. Line image display mode. [JJF1034-2020,6.60]

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