GB/T 31932-2015 PDF EnglishUS$85.00 · In stock · Download in 9 seconds
GB/T 31932-2015: Method for electromagnetic automatic ultrasonic testing for thicker steel plates 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 31932-2015: Method for electromagnetic automatic ultrasonic testing for thicker steel plates---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/GBT31932-2015GB NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA ICS 77.040.20 H 26 Method for electromagnetic automatic ultrasonic testing for thicker steel plates Issued on: SEPTEMBER 11, 2015 Implemented on: JUNE 1, 2016 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 General requirements ... 5 5 Comparative sample ... 5 6 Testing equipment ... 6 7 Testing methods ... 6 8 Testing records and defect evaluation ... 8 9 Steel plate quality grade ... 8 10 Testing reports ... 9 Appendix A (Informative) Comparative sample production ... 10ForewordThis Standard was drafted in accordance with the rules specified in GB/T 1.1- 2009. This Standard was proposed by China Iron and Steel Association. This Standard shall be under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC 183). The drafting organizations of this Standard. Hunan Valin Xiangtan Iron & Steel Co., Ltd., China Electronics Technology Information Industry Co., Ltd., Metallurgical Industry Information Standards Institute. The main drafters of this Standard. Cao Zhiqiang, Yuan Renping, Qian Hongliang, Dong Li, Chen Peiying, Li Xiaoli, Liu Yingqing, Yan Chongqiang, Zhang Weixu. Method for electromagnetic automatic ultrasonic testing for thicker steel plates1 ScopeThis Standard specifies the terms and definitions, general requirements, comparative samples, testing equipment, testing method, testing record and defect evaluation, steel plate grade, and inspection report, etc., of electromagnetic automatic ultrasonic testing for thicker steel plates. This Standard applies to the electromagnetic automatic ultrasonic testing for 6mm thickness below boiler, pressure vessels, bridges, construction, shipbuilding, pipelines, steel mold and other steel plates. The steel plate of other specifications can make reference to this Standard.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 2970 Thicker steel plate – Method for ultrasonic inspection GB/T 9445 Non-destructive testing – Qualification and certification of NED personnel GB/T 12604.1 Non-destructive testing – Terminology – Terms used in ultrasonic testing GB/T 20935.1 Method of electromagnetic acoustic inspection for metal materials – Part 1. Standard guide for electromagnetic acoustic transducers (EMATs)3 Terms and definitionsThe terms and definitions which are defined in GB/T 12604.1 and GB/T 20935.1 apply to this document. or parallel with the steel plate rolling direction. It shall ensure 100% scanning of the entire steel plate surface. 7.2 Testing rate During electromagnetic ultrasonic defect testing, the testing rate shall not exceed 2m/s. 7.3 Testing sensitivity 7.3.1 The testing sensitivity of electromagnetic automatic ultrasonic defect testing equipment can be calibrated by electronic technology, OR otherwise by comparative sample. 7.3.2 When using electronic technology for calibration, the sensitivity of the testing system shall be set by the first bottom wave of the testing steel plate’s flawless location based on the probe’s large flat probe DGS curve, probe 5mm flat bottom hole DGS curve, OR diameter 5mm flat bottom hole DAC curve; AND meanwhile the diameter 5mm flat bottom hole DGS curve or DAC curve is set as alarm threshold. The probe’s DGS curve can be provided by the probe manufacturer, whilst the DAC curve shall be subject to actual measurement by the comparative samples having different depth and diameter 5mm flat bottom holes. 7.3.3 When using the comparative sample for calibration, one method is at the comparative sample’s flawless location, ADJUST the first reflected wave height to 50% of the full scale, then INCREASE the dB difference (actual measurement) between the comparative sample’s first reflected wave and the diameter 5mm flat bottom hole wave, which is used as the testing sensitivity; the other method is at the comparative sample, ADJUST the 3mm flat groove reflected wave height to 50% of full scale, then DECREASE the dB difference (actual measurement) between the 3mm flat bottom groove and the diameter 5mm flat bottom hole wave, which is used as the testing sensitivity. 7.4 Calibration 7.4.1 The electromagnetic automatic ultrasonic defect testing equipment shall be regularly calibrated. 7.4.2 During the continuous operation of equipment, at least every 8h, USE the comparative sample to calibrate the testing sensitivity. As compared with the standard result, if the variance of the testing result is not less than 10%, it shall adjust the testing system, so as to make its performance reach to the specified requirements; it shall also re-conduct the defect testing for the tested steel plate after the previous calibration. ......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 31932-2015 be delivered?Answer: The full copy PDF of English version of GB/T 31932-2015 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 31932-2015_English with my colleagues?Answer: Yes. 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