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TB/T 2340-2012: Ultrasonic testing detector for rail Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid TB/T 2340: Historical versions
Similar standardsTB/T 2340-2012: Ultrasonic testing detector for rail---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/TBT2340-2012TB RAILWAYS INDUSTRY STANDARD ICS 45.120 S 23 Replacing TB/T 2340-2000, TB/T 2634-1995 Ultrasonic testing detector for rail Issued on. MARCH 01, 2012 Implemented on. JULY 01, 2012 Issued by. Ministry of Railways of the People's Republic of China Table of Contents1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 7 4 Technical requirements... 10 5 Inspection methods... 17 6 Inspection rules... 31 7 Mark, packaging, transportation, storage and accompanying documents... 33 Annex A... 35 Annex B... 36 Annex C... 37 Annex D... 38 Annex E... 39 Bibliography... 401 ScopeThis Standard specifies the terms and definitions, technical requirements, inspection methods, inspection rules, marks, package, transportation, storage etc. of the multi-channel ultrasonic testing detector for rail (hereinafter referred to as the detector) This Standard applies to multi-channel ultrasonic testing detector for rail.2 Normative referencesThe following documents are indispensable for application of this document. For the dated documents so quoted, only the dated versions apply to this document. For the undated documents so quoted, the latest versions (including all modification sheets) apply to this document. GB/T 2423.1 Environmental testing for electric and electronic and electronic products - Part 2.Test methods - Test A. Cold (GB/T 2423.1-2008, IEC 60068-2-1.2007, Environmental Testing - Part 2-1.Tests A. Cold, IDT) GB/T 2423.2 Environmental testing for electric and electronic and electronic products - Part 2.Test methods - Test A. Heat (GB/T 2423.2-2008, IEC 60068-2-2.2007, Environmental Testing - Part 2-2.Tests B. Dry heat, IDT) GB/T 2423.3 Environmental testing for electric and electronic products - Part 2.Test method - Test Cab. Damp heat Steady state (GB/T 2423.3-2006, IEC 60068-2-78.2001, Environmental Testing - Part 2-78.Tests Cab. Damp heat, steady state, IDT) GB/T 2423.7 Environmental testing for electric and electronic products Part 2.Test methods - Test Ec and guidance. Drop and topple Primarily for equipment-type specimens (GB/T 2423.7-1995, IEC 60068-2-31.1982, IDT)3 Terms and definitionsFollowing terms and definitions apply to this document. 3.1 Multi-channel ultrasonic testing detector for rail It can be used for the defect detection operation of in-service rail. It is the entirety of multi-channel ultrasonic testing detector displayed by the defect detection oscilloscope, including the instrument (including power), probe, water tank with coupling liquid, and trolley that can be pushed-travelled on the track. 3.4 Amplifier bandwidth The bandwidth between the high cutoff frequency and low cutoff frequency. This Standard sets the points where the amplifier gain is 3 dB below the peak value as the limits (see Figure 1). Figure 1 Amplifier bandwidth 3.5 Dynamic range The amplitude ratio between the maximum signal and the minimum signal the ultrasonic device can show. The minimum signal may be restricted by the system noise and the maximum signal may be restricted by the saturation of the amplifier or the maximum attenuation that induces large signal into the screen. Note. modify the definition 7.4 in GB/T 12604.1-2005. 3.6 Time base-linearity The degree of proportional relation BETWEEN the input signal provided by calibrated time generator or provided by multiple reflections of known-thickness plate AND the signal location indicated on the time base-line. [Definition 7.2 in GB/T 1604-2005]4 Technical requirements4.1 General rules 4.1.1 The detector shall be able to apply to the automatic defect detecting operation for in-service rail with 43 kg/m-75 kg/m. 4.1.4 Each channel of the detector shall be equipped with sound alarm device; the sound in each channel shall be easy to distinguish. 4.1.5 The detector shall be equipped with an attenuator. 4.1.6 The detector shall be powered by storage battery; the capacity of the battery shall be able to meet the requirement that the detector continuously operates for 8 hours. 4.1.10 The detector shall be no damage on its surface; there is no damage on the devices and components. The performance of each switch shall be stable; the display of indicator light, oscilloscope tube or display screen and others shall be normal. 4.1.11 The components of detector of the same model shall be exchangeable. 4.1.12 The digital detectors shall have functions such as measuring speed, data replaying, over-speed alarming, and delivering data according to specified data format. 4.2 Probe 4.2.1 General rules for probes 4.2.1.1 The surface of the probe shall be no damage. the probe wiring shall be flexible; the plug-in of connector shall be reliable; the shield shall be good. 4.2.1.2 The connectors of the probe shall meet the requirements of superior product or first grade class product in standard SJ/T 9562.2-1993. 4.2.2 Probe performance 4.2.2.1 Physical properties For flat probes, the flatness tolerance on the probe coupling surface shall not be more than 0.05 mm. 4.2.2.2 Echo frequency Transverse-wave probes. 2 MHz~2.5 MHz; longitudinal wave transducers. 3.5 MHz~5 MHz or 2 MHz~2.5 MHz. 4.2.2.7 Attenuation value of protection boots (film) The attenuation value of protection boots (film) shall be less than or equal to 8 dB. 4.2.2.8 Resolution The resolution R of 0° probe shall be ≥18 dB; the resolution R of offset-angle probe shall be ≥14 dB. 4.2.2.9 Sensitivity margin The high and low sensitivity of probes is expressed by the sensitivity margin after the probe has been combined with instruments; the specified value of sensitivity margin S is. 4.3.3 Dynamic range Minimum limitation. It shall not be less than 16 dB. Maximum limitation. 2 dB~6 dB. 4.3.4 Amplifier frequency response The central frequency obtained by f0 = (fu x fi)1/2 shall be within ±10% of nominal value. The amplifier bandwidth ∆f (3 dB lower-point) obtained by ∆f = fu - fi shall be within ±10% of nominal value of bandwidth, and shall not be less than 40% of the nominal central frequency of the probe. 4.3.9 The effects of operation voltage on the wave height of detector echo and the sensitivity of detection (alarm) Within the rated operation voltage, the position of the detector gate and alarm electrical level shall have no significant change; the change ∆Nd of echo amplitude and the detection (alarm) sensitivity change ∆Sd shall not be larger than 1dB respectively. 4.3.10 Digital detector 4.4 Combination property 4.4.1 Sensitivity margin 0° probes. When detecting the 110mm bottom-surface of the WGT-3 test block, and when the wave height reaches 80%, the sensitivity margin shall not be less than 36 dB. 35° probes and 70° probes. When detecting Φ3mm cross-hole with 65 mm depth on the WGT-3 test block (see Annex A), and when the wave height reaches 80%, the sensitivity margin shall not be less than 40 dB. 4.5 Electromagnetic compatibility The detector shall have relative strong anti-interference ability and can work normally nearby the electrified lines and stations. The electromagnetic compatibility of the detector shall comply with provisions of Chapter 6 (Performance decision A) in GB/T 18268.1-2010. 4.7 Temperature stability When the temperature changes by 10°C, the amplitude and range change of reference echo cannot exceed ± 5% and ± 1% respectively. 4.8 Vibration performance The detector shall be able to operate normally after the test in 5.8. 4.9 Drop performance The detector shall be able to operate normally after the test in 5.9. 4.10 Sealing performance The detector shall be able to operate normally after the test in 5.10. 4.11 Safety performance The insulation resistance between the traveling wheel and frame of the detector shall not be less than 1 MΩ; other parts of the detector shall meet insulation requirements.5 Inspection methods5.1 Inspection conditions 5.1.1 Environment condition. In addition to operation ambient temperature test, other tests can be carried out when the temperature is 10°C-30°C; the relative humidity is 50%-70%; the operation voltage does not exceed the rated operation voltage of the detector for rail; the external magnetic interference and direct sunlight shall be avoided with good ventilation. 5.1.5 The test of combination property shall use coupled probes provided by the manufacturer. 5.1.6 Coupling agent. Clean machinery oil or clean water. 5.2 Probes 5.2.1 Physical properties Visually inspect whether there are proper identification and assembly on the outer surface of the probe and physical damage that may affect the current or future reliability. Measure the flatness of the probe coupling surface with knife-edge ruler and feeler gauge. 5.2.4 Refraction angle error Inspect it according to provisions of 3.2.7 in JB/T 10062-1999.5.2.5.1. 5.2.5 Acoustic-axis offset angle 5.2.6 Relative deviation of combined probe Take the longitudinal center-line of probe housing as a base-line; use ruler to measure the vertical distance α1 and α2 from the two probe centers to the base-line. 5.2.7 Attenuation value of protective boot (film) Detect R100 mm arc surface of CSK-I A test block by using a 70° probe with protective boot (film); move the probe back-and-forth; and keep the probe parallel to the side of test block. 5.2.8 Resolution Resolution can be measured with universal flaw-detector conforming to JB/T 10061-1999 standard; the instrument inhibition is set to “zero” or “off” position when testing; it can add the matching coil if necessary. 5.3 Instrument 5.3.1 Pulse repetition frequency Inspection method is performed in accordance with the provision 4.12 of JB/T 10061-1999. 5.3.6 Vertical linearity error Measurement channel inhibition of flaw-detector is set to “0” or minimum; the attenuator has at least 20 dB of attenuation margin; find a reflected wave with the sound path equivalent to 100 mm ~ 200 mm longitudinal wave on WGT-3 test block; take it as the reference wave; adjust the gain and make the amplitude of reference wave up to 100% (the base-line of relative measurement channel). 5.4.4 Flaw-detection capability Rail flaw-detector is in an assembled state; it is pushed-travelled at normal flaw-detection speed; under the condition at a fixed flaw-detection sensitivity and no false alarm, other artificial defects on GTS-60 test block, other than 15° lower crack, shall be found one by one. In order to facilitate to distinguish the alarm sound, it can test different channels separately; it may also lengthen the test block, or process the defects of GTS-60 test block onto multiple test blocks for testing.6 Inspection rules6.1 The inspection of flaw-detector is divided into type inspection and exit-factory inspection. 6.2 Inspection items of flaw-detector are shown in Table 2.7 Mark, packaging, transportation, storage and accompanying documents7.1 Mark Nameplate of flaw-detector shall identify the type of flaw-detector (high temperature, low temperature, ordinary), manufacturer’s name, manufacturing time and serial numbers. 7.2 Packaging Product packaging shall be dustproof, waterproof, anti-vibration and pressure resistant; the instrument shall be isolated from the car and be packaged separately; the packaging mark shall be obvious. 7.5 Accompanying documentsAnnex A(Informative Annex) WGT-3 test block A.1 Technical conditions A.1.1 Chemical composition, grain size and internal defect inspection of test block material shall refer to JB/T 10063-1999. A.1.2 Limit deviation of unspecified tolerance size is in accordance with IT 14. A.1.3 Test block is produced by professional factory and shall conduct the united acceptance.Annex B(Informative Annex) GTS-60C lengthened test block Material and size of GTS-60C lengthened test block base shall comply with the provisions of TB/T 2344 corresponding technical requirements; all slot widths are 0.2 mm~0.3 mm. Other size requirements are shown in Figure B.1. TB/T 2340-2012 TB RAILWAYS INDUSTRY STANDARD ICS 45.120 S 23 Replacing TB/T 2340-2000, TB/T 2634-1995 Ultrasonic testing detector for rail Issued on. MARCH 01, 2012 Implemented on. JULY 01, 2012 Issued by. Ministry of Railways of the People's Republic of ChinaTable of Contents1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 7 4 Technical requirements... 10 5 Inspection methods... 17 6 Inspection rules... 31 7 Mark, packaging, transportation, storage and accompanying documents... 33 Annex A... 35 Annex B... 36 Annex C... 37 Annex D... 38 Annex E... 39 Bibliography... 401 ScopeThis Standard specifies the terms and definitions, technical requirements, inspection methods, inspection rules, marks, package, transportation, storage etc. of the multi-channel ultrasonic testing detector for rail (hereinafter referred to as the detector) This Standard applies to multi-channel ultrasonic testing detector for rail.2 Normative referencesThe following documents are indispensable for application of this document. For the dated documents so quoted, only the dated versions apply to this document. For the undated documents so quoted, the latest versions (including all modification sheets) apply to this document. GB/T 2423.1 Environmental testing for electric and electronic and electronic products - Part 2.Test methods - Test A. Cold (GB/T 2423.1-2008, IEC 60068-2-1.2007, Environmental Testing - Part 2-1.Tests A. Cold, IDT) GB/T 2423.2 Environmental testing for electric and electronic and electronic products - Part 2.Test methods - Test A. Heat (GB/T 2423.2-2008, IEC 60068-2-2.2007, Environmental Testing - Part 2-2.Tests B. Dry heat, IDT) GB/T 2423.3 Environmental testing for electric and electronic products - Part 2.Test method - Test Cab. Damp heat Steady state (GB/T 2423.3-2006, IEC 60068-2-78.2001, Environmental Testing - Part 2-78.Tests Cab. Damp heat, steady state, IDT) GB/T 2423.7 Environmental testing for electric and electronic products Part 2.Test methods - Test Ec and guidance. Drop and topple Primarily for equipment-type specimens (GB/T 2423.7-1995, IEC 60068-2-31.1982, IDT)3 Terms and definitionsFollowing terms and definitions apply to this document. 3.1 Multi-channel ultrasonic testing detector for rail It can be used for the defect detection operation of in-service rail. It is the entirety of multi-channel ultrasonic testing detector displayed by the defect detection oscilloscope, including the instrument (including power), probe, water tank with coupling liquid, and trolley that can be pushed-travelled on the track. 3.4 Amplifier bandwidth The bandwidth between the high cutoff frequency and low cutoff frequency. This Standard sets the points where the amplifier gain is 3 dB below the peak value as the limits (see Figure 1). Figure 1 Amplifier bandwidth 3.5 Dynamic range The amplitude ratio between the maximum signal and the minimum signal the ultrasonic device can show. The minimum signal may be restricted by the system noise and the maximum signal may be restricted by the saturation of the amplifier or the maximum attenuation that induces large signal into the screen. Note. modify the definition 7.4 in GB/T 12604.1-2005. 3.6 Time base-linearity The degree of proportional relation BETWEEN the input signal provided by calibrated time generator or provided by multiple reflections of known-thickness plate AND the signal location indicated on the time base-line. [Definition 7.2 in GB/T 1604-2005]4 Technical requirements4.1 General rules 4.1.1 The detector shall be able to apply to the automatic defect detecting operation for in-service rail with 43 kg/m-75 kg/m. 4.1.4 Each channel of the detector shall be equipped with sound alarm device; the sound in each channel shall be easy to distinguish. 4.1.5 The detector shall be equipped with an attenuator. 4.1.6 The detector shall be powered by storage battery; the capacity of the battery shall be able to meet the requirement that the detector continuously operates for 8 hours. 4.1.10 The detector shall be no damage on its surface; there is no damage on the devices and components. The performance of each switch shall be stable; the display of indicator light, oscilloscope tube or display screen and others shall be normal. 4.1.11 The components of detector of the same model shall be exchangeable. 4.1.12 The digital detectors shall have functions such as measuring speed, data replaying, over-speed alarming, and delivering data according to specified data format. 4.2 Probe 4.2.1 General rules for probes 4.2.1.1 The surface of the probe shall be no damage. the probe wiring shall be flexible; the plug-in of connector shall be reliable; the shield shall be good. 4.2.1.2 The connectors of the probe shall meet the requirements of superior product or first grade class product in standard SJ/T 9562.2-1993. 4.2.2 Probe performance 4.2.2.1 Physical properties For flat probes, the flatness tolerance on the probe coupling surface shall not be more than 0.05 mm. 4.2.2.2 Echo frequency Transverse-wave probes. 2 MHz~2.5 MHz; longitudinal wave transducers. 3.5 MHz~5 MHz or 2 MHz~2.5 MHz. 4.2.2.7 Attenuation value of protection boots (film) The attenuation value of protection boots (film) shall be less than or equal to 8 dB. 4.2.2.8 Resolution The resolution R of 0° probe shall be ≥18 dB; the resolution R of offset-angle probe shall be ≥14 dB. 4.2.2.9 Sensitivity margin The high and low sensitivity of probes is expressed by the sensitivity margin after the probe has been combined with instruments; the specified value of sensitivity margin S is. 4.3.3 Dynamic range Minimum limitation. It shall not be less than 16 dB. Maximum limitation. 2 dB~6 dB. 4.3.4 Amplifier frequency response The central frequency obtained by f0 = (fu x fi)1/2 shall be within ±10% of nominal value. The amplifier bandwidth ∆f (3 dB lower-point) obtained by ∆f = fu - fi shall be within ±10% of nominal value of bandwidth, and shall not be less than 40% of the nominal central frequency of the probe. 4.3.9 The effects of operation voltage on the wave height of detector echo and the sensitivity of detection (alarm) Within the rated operation voltage, the position of the detector gate and alarm electrical level shall have no significant change; the change ∆Nd of echo amplitude and the detection (alarm) sensitivity change ∆Sd shall not be larger than 1dB respectively. 4.3.10 Digital detector 4.4 Combination property 4.4.1 Sensitivity margin 0° probes. When detecting the 110mm bottom-surface of the WGT-3 test block, and when the wave height reaches 80%, the sensitivity margin shall not be less than 36 dB. 35° probes and 70° probes. When detecting Φ3mm cross-hole with 65 mm depth on the WGT-3 test block (see Annex A), and when the wave height reaches 80%, the sensitivity margin shall not be less than 40 dB. 4.5 Electromagnetic compatibility The detector shall have relative strong anti-interference ability and can work normally nearby the electrified lines and stations. The electromagnetic compatibility of the detector shall comply with provisions of Chapter 6 (Performance decision A) in GB/T 18268.1-2010. 4.7 Temperature stability When the temperature changes by 10°C, the amplitude and range change of reference echo cannot exceed ± 5% and ± 1% respectively. 4.8 Vibration performance The detector shall be able to operate normally after the test in 5.8. 4.9 Drop performance The detector shall be able to operate normally after the test in 5.9. 4.10 Sealing performance The detector shall be able to operate normally after the test in 5.10. 4.11 Safety performance The insulation resistance between the traveling wheel and frame of the detector shall not be less than 1 MΩ; other parts of the detector shall meet insulation requirements.5 Inspection methods5.1 Inspection conditions 5.1.1 Environment condition. In addition to operation ambient temperature test, other tests can be carried out when the temperature is 10°C-30°C; the relative humidity is 50%-70%; the operation voltage does not exceed the rated operation voltage of the detector for rail; the external magnetic interference and direct sunlight shall be avoided with good ventilation. 5.1.5 The test of combination property shall use coupled probes provided by the manufacturer. 5.1.6 Coupling agent. Clean machinery oil or clean water. 5.2 Probes 5.2.1 Physical properties Visually inspect whether there are proper identification and assembly on the outer surface of the probe and physical damage that may affect the current or future reliability. Measure the flatness of the probe coupling surface with knife-edge ruler and feeler gauge. 5.2.4 Refraction angle error Inspect it according to provisions of 3.2.7 in JB/T 10062-1999.5.2.5.1. 5.2.5 Acoustic-axis offset angle 5.2.6 Relative deviation of combined probe Take the longitudinal center-line of probe housing as a base-line; use ruler to measure the vertical distance α1 and α2 from the two probe centers to the base-line. 5.2.7 Attenuation value of protective boot (film) Detect R100 mm arc surface of CSK-I A test block by using a 70° probe with protective boot (film); move the probe back-and-forth; and keep the probe parallel to the side of test block. 5.2.8 Resolution Resolution can be measured with universal flaw-detector conforming to JB/T 10061-1999 standard; the instrument inhibition is set to “zero” or “off” position when testing; it can add the matching coil if necessary. 5.3 Instrument 5.3.1 Pulse repetition frequency Inspection method is performed in accordance with the provision 4.12 of JB/T 10061-1999. 5.3.6 Vertical linearity error Measurement channel inhibition of flaw-detector is set to “0” or minimum; the attenuator has at least 20 dB of attenuation margin; find a reflected wave with the sound path equivalent to 100 mm ~ 200 mm longitudinal wave on WGT-3 test block; take it as the reference wave; adjust the gain and make the amplitude of reference wave up to 100% (the base-line of relative measurement channel). 5.4.4 Flaw-detection capability Rail flaw-detector is in an assembled state; it is pushed-travelled at normal flaw-detection speed; under the condition at a fixed flaw-detection sensitivity and no false alarm, other artificial defects on GTS-60 test block, other than 15° lower crack, shall be found one by one. In order to facilitate to distinguish the alarm sound, it can test different channels separately; it may also lengthen the test block, or process the defects of GTS-60 test block onto multiple test blocks for testing.6 Inspection rules6.1 The inspection of flaw-detector is divided into type inspection and exit-factory inspection. 6.2 Inspection items of flaw-detector are shown in Table 2.7 Mark, packaging, transportation, storage and accompanying documents7.1 Mark Nameplate of flaw-detector shall identify the type of flaw-detector (high temperature, low temperature, ordinary), manufacturer’s name, manufacturing time and serial numbers. 7.2 Packaging Product packaging shall be dustproof, waterproof, anti-vibration and pressure resistant; the instrument shall be isolated from the car and be packaged separately; the packaging mark shall be obvious. 7.5 Accompanying documentsAnnex A(Informative Annex) WGT-3 test block A.1 Technical conditions A.1.1 Chemical composition, grain size and internal defect inspection of test block material shall refer to JB/T 10063-1999. A.1.2 Limit deviation of unspecified tolerance size is in accordance with IT 14. A.1.3 Test block is produced by professional factory and shall conduct the united acceptance.Annex B(Informative Annex) GTS-60C lengthened test block Material and size of GTS-60C lengthened test block base shall comply with the provisions of TB/T 2344 corresponding technical requirements; all slot widths are 0.2 mm~0.3 mm. Other size requirements are shown in Figure B.1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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