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GB/T 21847-2008: Chemical products for industrial use -- Determination of inflammation of gases
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21847-2008 | English | 134 |
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Chemical products for industrial use -- Determination of inflammation of gases
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GB/T 21847-2008
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Basic data | Standard ID | GB/T 21847-2008 (GB/T21847-2008) | | Description (Translated English) | Chemical products for industrial use -- Determination of inflammation of gases | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300 | | Word Count Estimation | 7,772 | | Date of Issue | 2008-05-12 | | Date of Implementation | 2008-09-01 | | Adopted Standard | NF T20-041-1985, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards 2008 No. 8 (No. 121 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard applies to determine the gas chemical products in the same below ambient pressure surrounding air mixture flammability. | GB/T 21847-2008: Chemical products for industrial use -- Determination of inflammation of gases---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Chemical products for industrial use. Determination of inflammation of gases
ICS 13.300
A80
National Standards of People's Republic of China
Chemical products for industrial use flammable gas determined
Posted 2008-05-12
2008-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is equivalent to using NFT20-041. 1985 "Chemical products for industrial use flammable gas determined" (French version).
This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points.
This standard is drafted by. Tianjin CIQ.
Participated in the drafting of this standard. Jiangsu Exit Inspection and Quarantine, Chinese Academy of Inspection and Quarantine.
The main drafters of this standard. in Yanjun, Chi Yu Feng, Xu Yan, Xiongzhong Jiang, Zhou Xin, Li Jing.
This standard is the first release.
NFT Introduction
This Standard on August 5, 1985 approved by the Director-General of the French Association for Standardization, on September 5, 1985 entered into force.
Before publication of this standard, which no internationally relevant international standards, but it is with the 84/449 the party/CEE Directive Committee A11
Anastomosis.
This standard is for those who engage in physical and chemical properties of chemicals (industrial use) analysis, in this case, you must write a
Parts of the technical dossier, in order to provide a new set of content, or in accordance with the provisions of No. 82-950 preparation, taking into account the 79/831/CEE Terms
On Sixth Amendment 67/548/CEE on the terms of the relevant provisions of hazardous substances.
The standard method is a gas and air mixture in different proportions, close to the gas mixture with a spark and see if there may be a mixed gas
Flammable.
International Technology Glossary. \u200b\u200bchemical products, industrial products, gases, hazardous substances, physical and chemical composition, uncertainty, flammable, surroundings
test.
Chemical products for industrial use flammable gas determined
1 Scope
This standard applies to the determination of gas chemical products in the pressure with the surrounding environment combustible air mixed.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
The highest and lowest limit gas explosion on contact with air. The highest and lowest explosive limit combustible gas is in contact with air fire
Not spread range.
Principle 3
Gradually increase the gas concentration in the air, each additional concentration ignition time to observe whether there is a flame spread.
4 Reagents and materials
4.1 Test Tube
High 300mm, 50mm of the inner diameter of the glass tube, the distance between the ignition has poles 3mm ~ 5mm and 60mm is fixed in a test tube
Place. Test tube with a bracket protection.
4.2 ignition source
Standard ignition source of 10kV ~ 15kV high voltage transformer output voltage (maximum input power of 300W) generate interval 0.5s
EDM, as the ignition source.
4.3 metering pump
5 test procedure
At room temperature and atmospheric pressure, the gas in the test tube (4.1) in a concentration of the test gas injected into the air by a metering pump (4.3)
Mixture.
Mars burst in the mixed gas, to observe the situation and circumstances of the spread of the flame produced in the gas mixture.
In each 1% increase in the gas concentration measurement, the test is repeated until a flame above description, and then continue to increase gas
Until the concentration of the mixed gas is no longer burst of flame.
6 Test Results
During the test gas concentration in the sample increased gradually mixed with air gap variation flammability, flame in mL/m3 count
Gas concentration.
7 Test report
The test report shall include the following.
a) Sample Information (impurities, etc.);
b) the use of reference.
--- Instrument used (volume, etc.),
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