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GB/T 23900-2009: Non-destructive testing -- Practice for measuring ultrasonic velocity in materials
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 23900-2009 | English | 559 |
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Non-destructive testing -- Practice for measuring ultrasonic velocity in materials
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GB/T 23900-2009
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Basic data | Standard ID | GB/T 23900-2009 (GB/T23900-2009) | | Description (Translated English) | Non-destructive testing -- Practice for measuring ultrasonic velocity in materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 19.100 | | Word Count Estimation | 24,244 | | Date of Issue | 2009-05-26 | | Date of Implementation | 2009-12-01 | | Quoted Standard | GB/T 12604.1; JB/T 9214 | | Adopted Standard | ASTM E494-2005, MOD | | Regulation (derived from) | PRC National Standard Approval Announcement 2009 No.7 (Total No.147) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the type A pulse-echo ultrasonic testing equipment to measure the speed of the material ultrasound method. This standard describes a known ultrasonic velocity reference material (test piece) to measure the speed of ultrasound in the test material by way of comparison. | GB/T 23900-2009: Non-destructive testing -- Practice for measuring ultrasonic velocity in materials
---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.
Non-destructive testing. Practice for measuring ultrasonic velocity in materials
ICS 19.100
J04
National Standards of People's Republic of China
Non-destructive testing of materials for measuring ultrasonic velocity
Posted 2009-05-26
2009-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions
Overview 4 1
5 Equipment 1
6 Measurement procedures 2
7 3 Report
Other important technical appendix A (informative) material ultrasonic velocity measurements 5
Annex B (informative) speed of sound engineering materials 14
Annex C (informative) Changes in water temperature of 16 supersonic speeds
Foreword
This revised standard adopts ASTME494-05 "material ultrasonic velocity measurement methods" (in English).
This standard redrafted according ASTME494-05.
Taking into account China's national conditions, when using ASTME494-05, we made some changes in this standard. About the technical differences are as follows.
--- The Normative references to our standards;
--- Remove ASTME494-05 Chapter 5;
--- Remove ASTME494-05 Chapter 9;
--- Remove ASTME494-05 informative Appendix X1.
For ease of use, this standard also made the following editorial changes.
--- "The method" be replaced by "this standard";
--- Insert GB/T 1.1-2000 specified key words in Chapter 2;
--- According to GB/T 1.1-2000 prescribed format requirements of appendix and part of the reg number re-done.
This standard Annex A, Annex B and Annex C is informative appendix.
The standard non-destructive testing by the National Standardization Technical Committee (SAC/TC56) and focal points.
This standard was drafted. Chinese Special Equipment Inspection and Research Institute.
Drafters of this standard. Shen Tian Gong, Wu Yan.
Non-destructive testing of materials for measuring ultrasonic velocity
1 Scope
This standard specifies the type A pulse reflection type ultrasonic flaw detection device to measure material ultrasonic velocity method.
This standard describes a supersonic velocity known reference material (test piece) adopted by the comparative method to measure the material being tested
Supersonic speeds.
This standard is applicable between the two surfaces to a thickness greater than or equal to 5mm of solid material, and perpendicular to the direction of propagation of the ultrasonic energy
The parallelism between ± 3 °, and coupled with the ultrasonic probe surface roughness better than 3.2μm.
Other specially developed ultrasound equipment, auxiliary equipment and special technology available to more accurate results. Appendix A lists the measurement of ultra
Some other methods of acoustic velocity.
Note. The factors include changes in technology, equipment, material type, and operators who will cause changes in the speed indicator, sometimes even up to 5%. Due to the above
Su integrated together affect the outcome expected to increase detection accuracy (probably less than 1% tolerance).
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 12604.1 Terminology for nondestructive testing Ultrasonic testing (GB/T 12604.1-2005, ISO 5577.2000,
Non-destructivetesting-Ultrasonicinspection-Vocabulary, IDT)
JB/T 9214 A pulse reflection type ultrasonic flaw detection system performance test method
3 Terms and Definitions
Terms and definitions GB/T 12604.1 established apply to this standard.
4 Overview
In the solid can propagate several possible vibration modes. This standard relates to two kinds of propagation speed, namely the speed of longitudinal waves (vp l) and transverse
Speed \u200b\u200b(vp s). When the sample in the direction perpendicular to the beam geometry and beam area much larger than the wavelength of the longitudinal wave velocity from a few specimens
Geometry of. Shear wave propagating speed is substantially unaffected by the specimen geometry. The method covered by this standard applies only to routine
Pulse reflection type ultrasonic flaw detection equipment.
5 device
5.1 Test Instruments
Any ultrasound machines are made of baseline emission (pulse) device, receiving device (echo amplifier) \u200b\u200band A-scan display circuit
, And it can produce, receive and display the ultrasonic signals. The instrument should be able to ± 0.5mm precision baseline readout Ak, Al, At the time along the A-scan,
As (see definition in 6.1.5 and 6.2.5), and several other locations. For best accuracy, we should adopt the highest possible frequency, and at least be able to
Showing 2 times, preferably 5 times the echo reflected from clear.
5.2 Probe
Contact method for the detection of the probe should be able to generate and receive the appropriate size, type and frequency of ultrasound. Longitudinal wave mode is used in direct contact with
Compressional wave velocity measurements, direct contact with the shear wave velocity measurement mode is used.
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