GB/T 5450-2014 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 5450-2014 | English | 310 |
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Audibert-Arnu dilatometer test of bituminous coal
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| GB/T 5450-1997 | English | 599 |
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Audibert-Arnu dilatometer test of bituminous coal
| Obsolete |
| GB/T 5450-1985 | English | RFQ |
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Audibert-Arnu dilatometer test of bituminous coal
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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/GBT5450-2014
NATIONAL 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 Contents
Foreword... 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... 24
Foreword
This 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 coal
1 Scope
This 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 references
The 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 definitions
The 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 summary
The 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 Instruments
The 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 storage
The 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 inspection
The 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 procedure
Remove 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 results
Figures 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 precision
The repeatability limit and reproducibility critical difference of Audibert-Arnu
dilatometer test of bituminous coal are as specified in Table 3.
11 Test report
The 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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