GB/T 21847-2008 English PDF

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GB/T 21847-2008: Chemical products for industrial use -- Determination of inflammation of gases
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21847-2008	134	Add to Cart	3 days	Chemical products for industrial use -- Determination of inflammation of gases	Valid

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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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