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GB/T 34370.5-2017: Nondestructive testing of amusement equipment - Part 5: Ultrasonic testing Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 34370.5-2017: Nondestructive testing of amusement equipment - Part 5: Ultrasonic testing---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/GBT34370.5-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 97.200.40 Y 57 Nondestructive testing of amusement equipment - Part 5.Ultrasonic testing Issued on. SEPTEMBER 29, 2017 Implemented on. APRIL 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. 1 ScopeThis part of GB/T 34370 specifies the requirements for ultrasonic testing methods, quality grading, ultrasonic thickness measurement methods for amusement equipment. This part applies to ultrasonic testing of metal raw materials, parts, welded joints for amusement equipment, as well as ultrasonic testing of metal parts and welded joints for use in amusement equipment.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard. GB/T 7233.1 Steel castings - Ultrasonic examination - Part 1.Steel castings for general purposes GB/T 11344 Non-destructive testing - Practice for measuring thickness by ultrasonic pulse-echo contact method GB/T 12604.1 Non-destructive testing - Terminology - Terms used in ultrasonic testing GB/T 20306 Amusement devices terminology GB/T 20737 Non-destructive testing - General terms and definitions GB/T 27664.1 Non-destructive testing - Characterization and verification of ultrasonic test equipment - Part 1.Instruments GB/T 27664.2 Non-destructive testing - Characterization and verification of ultrasonic test equipment - Part 2.Probes GB/T 29302 Non-destructive testing instruments - Characterization and verification of phased array ultrasonic examination systems GB/T 34370.1 Nondestructive testing of amusement equipment - Part 1. General requirement3 Terms and definitionsThe terms and definitions as defined in GB/T 12604.1, GB/T 20306, GB/T 20737, GB/T 34370.1 as well as the following terms and definitions apply to this document. 3.1 Loss of back reflection caused by flaws BG/BF (dB) The ratio of the first bottom-wave amplitude BG in a flaw-free region which is close to the flaw to the first bottom-wave amplitude BF in the flaw region, expressed by the value of sound pressure level (dB). 3.2 Basic and scanning sensitivities The basic sensitivity generally refers to the recording sensitivity, which is usually used for the quantitation of flaws and the classification of flaws. The scanning sensitivity mainly refers to the actual testing sensitivity. In order not to miss recording flaws or certain specific flaws, to ensure the safety of the amusement equipment, the actual testing is usually carried out by a high testing sensitivity for scanning. In principle, the scanning sensitivity shall not be lower than the basic sensitivity. 3.3 Focusing angle beam probe An ultrasonic angle beam probe that uses a focusing method such as a lenticular, an emissive, a curved wafer, to converge the ultrasonic beam to improve testing sensitivity. 3.4 Tip diffraction During the propagation of ultrasonic waves, when the wave-front passes through the flaw, the wave-front will bend around the edge of the flaw and spread in the center of the circle. 3.5 Maximum tip reflected wave When the amplitude of the end echo of the flaw reaches a maximum (that is, the instantaneous amplitude position before the peak of the flaw end’s echo- peak starts to fall), the echo is called the maximum tip reflected wave. 3.6 Echo dynamic patterns The dynamic waveform is the envelope of the probe's moving distance and the echo’s amplitude change of the corresponding flaw reflector.4 Summary of method4.1 Ultrasonic waves are mechanical waves which have a frequency higher than 20 kHz. The frequency which is commonly used for ultrasonic testing in industrial non-destructive testing is 0.5 MHz ~ 5 MHz. 4.2 Ultrasonic waves propagate in the material at a certain speed and direction. When a heterogeneous interface (such as a flaw or the bottom-surface of the object to be tested) with different acoustic impedance is encountered, it will reflect or diffract. 4.3 Reflective ultrasonic testing is to use this reflection phenomenon for flaw testing or thickness measurement. Figures 1a) ~ c) are schematic diagrams for type-A pulse oblique incident ultrasonic testing, type-A pulse direct incident ultrasonic testing, type-A pulse reflective ultrasonic thickness measurement.5 Safety requirements5.1 This clause does not list all safety requirements for testing. Users using this part shall establish safety guidelines prior to testing. 5.2 The safety requirements during the testing process include at least. a) The testing personnel shall comply with the safety requirements of the site where the workpiece under testing is located, wear protective overalls and wear relevant protective equipment according to the requirements of the site of testing; b) The wall temperature of the tested workpiece shall be within the temperature range during which the coupling agent works normally; c) It shall be noted that during ultrasonic testing, the coupling agent may cause poor insulation and short-circuit of the electrical equipment; d) For the testing of the amusement equipment after putting into operation,6 Personnel requirementsPersonnel engaged in ultrasonic testing of amusement equipment shall comply with the relevant provisions of GB/T 34370.1.7 Testing equipment7.1 Basic requirements 7.1.1 Ultrasonic testing equipment shall include at least testing equipment and 7.1.2 Ultrasonic testing equipment shall have a certificate of product quality or a certificate of conformity. 7.2 Testing equipment 7.3 Probe 7.3.1 Single-transducer or double-transducer probes, including focus or non- focus contact or liquid-immersed probes. The diameter of the circular wafer shall generally not exceed 40 mm. The length of either side of the square wafer shall generally not exceed 40 mm. The performance indicators shall be tested according to the requirements of GB/T 27664.2. 7.3.2 The center frequency of the ultrasonic phased array probe is generally in the range of 0.5 MHz ~ 15 MHz, the number of array elements shall be not less than 8.The performance indicators are tested according to the requirements of JB/T 11731. 7.4 System performance of ultrasonic detectors and probes 7.4.1 System performance requirements for type-A pulse reflection ultrasonic detectors and probes. 7.4.2 System performance requirements for ultrasonic thickness gauges and probes. 7.4.3 System performance requirements for phased array ultrasonic detectors and probes. 7.4.4 It shall test the combined performance of the test instrument and the probe in the following cases. 7.5 Test block 7.5.1 Test block for type-A pulse reflection ultrasonic testing 7.5.1.1 Standard test block 7.5.1.3 Simulation test block 7.5.2 Test block for ultrasonic thickness testing 7.5.3 Test block for phased array ultrasonic testing The test blocks for phased array ultrasonic testing are divided into standard test blocks, control test blocks, simulation test blocks. 7.6 Requirements for calibration, verification, in-period verification and inspection of ultrasonic testing equipment and materials 7.6.1 General requirements 7.6.1.1 Calibration, verification and intermediate verification shall be performed on standard test blocks. 7.6.1.2 During calibration, verification and intermediate verification shall be such that the main sound beam of the probe is vertically aligned with the reflecting surface of the reflector, to obtain a stable and maximum reflected signal. 7.6.2 Calibration, verification, intermediate verification or inspection 7.6.2.1 It shall carry out at least one calibration of the ultrasonic detector. The calibration requirements shall meet the requirements of the calibration procedures of ultrasonic detector. 7.7 Recheck of newly-purchased probes and testing process 7.7.1 Determination of newly-purchased probe 7.7.2 Pre-testing determination of instrument and probe system 7.7.3 Recheck of instrument and probe system 7.7.3.1 It shall recheck the instrument and probe system if any of the following conditions are encountered during the testing process. 7.7.3.2 If the offset of any point on the scan line exceeds 10% of the reading at this point of the scan line or 5% of the full scan range, the scan range shall be adjusted again and all tested workpieces be rechecked since the last recheck. 7.7.3.3 During the recheck, if the echo amplitude of any artificial reflector is reduced by 2 dB at any depth in the testing range or the distance-amplitude curve, all the testing parts shall be re-checked since the last recheck; if the rise is 2 dB, all recorded signals shall be re-evaluated.8 Testing procedure8.1 General testing procedures The organizations engaged in ultrasonic testing of amusement equipment shall formulate general testing procedures according to the requirements of GB/T 34370.1 and this part, its contents shall at least include the following elements. 8.2 Testing process card 8.2.1 For each tested workpiece, according to the instrument used and the actual site conditions, compile the ultrasonic testing process card according to GB/T 34370.1, this document, the general testing procedure, to determine the testing location and surface conditions. Map each tested workpiece, draw the structural diagram of the tested workpiece and the coverage area of the probe. 8.2.2 The determination of the testing surface shall ensure that the tested workpiece of the workpiece is fully checked. 8.2.3 In the ultrasonic testing of the amusement equipment in the process of manufacture, installation, operation, the timing of the testing as well as the selection of the sampling rate shall be carried out according to the requirements and principles of the regulations, product standards and relevant technical documents. 8.2.4 The testing process card shall at least include the following contents.9 Preparation before testing9.1 Data review The data review shall include the following. 9.2 Site survey 9.2.1 For the in-use amusement equipment, before the implementation of the testing, it shall make site survey for the tested equipment, to determine the supporting conditions for the implementation of the testing, identify all factors that may affect the test. The interference of these factors shall be avoided as far as possible during the testing. 9.2.2 The surface quality of the tested workpiece shall pass the visual inspection. All rust, splash or dirt that affect ultrasonic testing shall be removed, the surface roughness shall meet the testing requirements. The irregular state of the surface shall not affect the correctness and completeness of the testing results, otherwise it shall be properly treated. 9.3 Requirements for scanning coverage 9.3.1 It shall be ensured that the ultrasonic beam may scan the entire testing area of the workpiece during the testing. 9.3.2 Each scanning coverage of the probe shall be greater than 15% of the diameter of the probe or preferentially meet the testing coverage requirements of the corresponding clauses. 9.4 Requirements for probe’s movement speed 9.5 Requirements for scanning sensitivity 9.5.1 The scanning sensitivity shall normally not be lower than the basic sensitivity and shall be according to the relevant clauses. 9.5.2 Before each testing, the set temperature of time baseline, the sensitivity shall differ from the temperature of the tested workpiece for not more than 15 °C. 9.6 Coupling agent 9.6.1 It shall use the coupling agents that have good sound transmission and do not damage the testing surface, such as engine oil, paste, glycerin, water. 9.6.2 The selection of the coupling agents shall take into account the requirements of the conditions and environment of use. 9.7 Sensitivity compensation 9.8 Compilation of testing process card 9.8.1 It shall be determined that the timing of ultrasonic testing and the selection of testing ratios are in compliance with relevant regulations, standards, relevant technical documents. 9.8.2 The contents of the testing process card shall be according to 8.2. 10 Ultrasonic testing and quality grading of raw materials and components 10.1 Ultrasonic testing and quality grading of sheet for amusement equipment 10.1.1 Scope of application of ultrasonic testing of sheet 10.1.2 Principles of testing 10.1.2.1 Sheets are generally tested by straight probes. 10.1.2.2 When there is any doubt about the flaw during the testing process or as specified in the technical agreement between the two parties, it may use the angle beam probe for testing. 10.1.2.3 Any rolled surface of the optional sheet is tested. If the testing personnel believes necessary or as required by the technical conditions, it may also select the upper and lower rolling surfaces of the sheet for testing. 10.1.3 Selection of probes 10.1.4 Test block 10.1.5 Determination of sensitivity 10.1.6 Testing 10.1.7 Determination and recording of flaws ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 34370.5-2017 be delivered?Answer: The full copy PDF of English version of GB/T 34370.5-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 34370.5-2017_English with my colleagues?Answer: Yes. 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