GB/T 5450-2014 PDF EnglishUS$310.00 · In stock · Download in 9 seconds
GB/T 5450-2014: Audibert-Arnu dilatometer test of bituminous coal Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 5450: Historical versions
GB/T 5450-2014: Audibert-Arnu dilatometer test of bituminous coal---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/GBT5450-2014NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.040 D 21 Replacing GB/T 5450-1997 Audibert-Arnu dilatometer test of bituminous coal (ISO 349.1975, Hard coal - Audibert-Arnu dilatometer test, MOD) Issued on. JUNE 09, 2014 Implemented on. OCTOBER 01, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Method summary... 5 5 Instruments... 6 6 Specimen preparation and storage... 13 7 Instrument calibration and inspection... 14 8 Test procedure... 15 9 Expression of results... 17 10 Method precision... 19 11 Test report... 20 Appendix A (Informative) Comparison of clause number between this standard and ISO 349.1975... 21 Appendix B (Informative) Technical differences between this standard and ISO 349.1975 and their causes... 22 Appendix C (Normative) Inspection of dilatation tube and dilatation rod... 24ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 5450-1997 "Audibert-Arnu dilatometer test of bituminous coal". Compared with GB/T 5450-1997, the main technical changes are as follows. - DELETE the description of the number of turns of the electric furnace wire in the original standard (see 4.1.2 of the 1997 edition); - MODIFY the contraction of adjustment lever to the tilt contraction (see Chapter 9.1; Chapter 7 of the 1997 edition); - It is stipulated that if the initial dilatation temperature is greater than 500 °C during tilt contraction, the initial dilatation temperature shall be reported as 500 °C (see 8.1). This standard uses the redrafting method to modify and adopt ISO 349.1975 "Hard coal - Audibert-Arnu dilatometer test". Compared with ISO349.1975, this standard has been structurally adjusted. Appendix A lists the comparison of clause number between this standard and ISO 349.1975. There are technical differences between this standard and ISO 349.1975.The terms involved in these differences have been marked by vertical single lines (I) on the outer margins of the corresponding page. Appendix B gives a list of corresponding technical differences and their causes. This standard was proposed by China Coal Industry Association. This standard shall be under the jurisdiction of the National Coal Standardization Technical Committee (SAC/TC 42). Drafting organization of this standard. Testing Research Branch of the Coal Science Research Institute. The main drafters of this standard. Chen Baohua, Li Hongtu, Xing Xiuyun. The previous editions of GB/T 5450-1997 are as follows. - GB/T 5450-1985. Audibert-Arnu dilatometer test of bituminous coal1 ScopeThis standard specifies the terms and definitions, method summary, reagents and materials, instruments and equipment, specimens, test procedures, expression of results, method precision of Audibert-Arnu dilatometer test of bituminous coal.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.3 Terms and definitionsThe following terms and definitions apply to this document. The temperature at which the dilatation rod stops moving. The percentage of maximum distance that the dilatation rod rises to the length of the coal pencil.4 Method summaryThe test coal sample is made into a coal pencil of a certain specification according to the prescribed method, placed in a standard caliber tube (dilatation tube), on which a steel rod (dilatation rod) that can slide freely in the tube is placed.5 InstrumentsThe electric furnace is composed of a shell with a base and a top cover as well as a metal furnace core. The furnace core is made of aluminum bronze metal block which can resist oxidation.6 Specimen preparation and storageThe prepared coal samples for general analysis and testing shall be packed in glass bottles with ground stoppers and placed in a cool place. The test shall be completed within 3 days after preparation.7 Instrument calibration and inspectionThe gauge can be used to check the wear of the forming mold used in the test. Meanwhile it can also be used to check the new forming mold. If it inserts the gauge from the large-diameter end of the forming mold being inspected, it can observe.8 Test procedureRemove the wire plug at the bottom of the dilatation tube. Use a metal rod with an axe-shaped head to remove the semi-coke in the tube. Then use a copper wire brush to clean the remaining semi-coke powder in the tube.9 Expression of resultsFigures 10 ~ 13 respectively show four types of recording curves for positive dilatation, negative dilatation, contraction only, tilt contraction in the bituminous coal dilatometer test.10 Method precisionThe repeatability limit and reproducibility critical difference of Audibert-Arnu dilatometer test of bituminous coal are as specified in Table 3.11 Test reportThe test result report shall include at least the following information. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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