GB/T 31391-2015 English PDF
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GB/T 31391-2015: Ultimate analysis of 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/GBT31391-2015NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.040 D 21 Ultimate analysis of coal (ISO 17247.2013, Coal - Ultimate analysis, MOD) Issued on. MAY 15, 2015 Implemented on. JULY 01, 2015 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Method summary... 5 5 Test methods... 5 6 Result expression... 5 7 Test report... 8 Annex A (informative) Comparison on chapter and subchapter numbers between this Standard and ISO 17247.2013... 10 Annex B (informative) Technical differences between this Standard and ISO 17247.2013 and their reasons... 11 Annex C (informative) Examples of ultimate analysis of coal... 12Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard uses redrafting method to modify and adopt ISO 17247.2013 “Coal - Ultimate analysis”. Compared with ISO 17247.2013, this Standard has more structural adjustments. Annex A lists the comparison on chapter and subchapter numbers between this Part and ISO 17247.2013. There are technical differences between this Standard and ISO 17247.2013.The terms to which these differences relate have been indicated by a vertical single line (∣) in their outer margins. A list of the corresponding technical differences and their reasons is given in Annex B. This Standard also makes the following editorial modifications. - Change “this International Standard” to “this Standard”; - Use decimal point "." to replace comma "," in the ISO standard. This Standard was proposed by China Coal Industry Association. This Standard shall be under the jurisdiction of National Technical Committee on Coal of Standardization Administration of China (SAC/TC 42). The drafting organizations of this Standard. Coal Research Institute Testing and Research Branch, Shenhua Sales Group Co., Ltd. Main drafters of this Standard. Li Ting, Wang Runye, Xing Yongfeng, Pi Zhongyuan. Ultimate analysis of coal1 Scope
This Standard specifies the terms and definitions, method summary, test methods, result expression and test report of ultimate analysis of coal. This Standard applies to coal.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 211, Determination of total moisture in coal3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 483 and GB/T 3715 apply. It is obtained by subtracting the carbon, hydrogen, nitrogen, sulfur, ash and moisture of coal from 100, expressed in mass fraction.4 Method summary
Carry out the experimental analysis of coal carbon, hydrogen, nitrogen, sulfur, ash and moisture. Oxygen is calculated by subtraction.5 Test methods
According to the test method specified in Table 1, the carbon, hydrogen, nitrogen, sulfur, ash and moisture of coal are measured, respectively.6 Result expression
Calculate the air-drying basis hydrogen (Hm,ad) content including hydrogen in moisture according to formula (2). The test results of carbon, hydrogen, nitrogen, sulfur, ash and moisture of coal and calculated oxygen by difference are expressed in mass fraction. Except for oxygen by difference, other items can be converted based on GB/T 483.7 Test report
The test report shall include at least the following information.Annex A
(informative) Comparison on chapter and subchapter numbers between this Standard and ISO 17247.2013Annex B
(informative) Technical differences between this Standard and ISO 17247.2013 and their reasonsAnnex C
(informative) Examples of ultimate analysis of coal The examples of ultimate analysis of coal are shown in Table C.1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
