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SN/T 4787-2017 English PDF

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SN/T 4787-2017: Chemicals - Classification test method for chemically unstable gases and gas mixtures
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PDF similar to SN/T 4787-2017


Standard similar to SN/T 4787-2017

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Basic data

Standard ID SN/T 4787-2017 (SN/T4787-2017)
Description (Translated English) Chemicals - Classification test method for chemically unstable gases and gas mixtures
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard G09
Word Count Estimation 10,189
Date of Issue 2017-05-12
Date of Implementation 2017-12-01
Quoted Standard GB 30000.3-2013; ISO 10156; BS EN 1839; ASTM E 918-1983
Regulation (derived from) State-Quality-Inspection-Accreditation (2017) 228
Issuing agency(ies) General Administration of Customs
Summary This standard specifies test methods and classification criteria for chemically unstable gas and gas mixtures. This standard applies to the determination and classification of a chemically unstable gas in an additional sub-category of flammable gases in the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS) (Revised 6). This standard does not apply to the determination of the decomposition of gases under process conditions in chemical plants and the hazardous reactions that may occur between gases in a gas mixture.

SN/T 4787-2017: Chemicals - Classification test method for chemically unstable gases and gas mixtures


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(Classification of chemical instability of chemical gases and gases) People's Republic of China entry and exit inspection and quarantine industry standards Chemistry of chemical gases and gas mixtures Instability classification method Released on.2017-05-12 2017-12-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued Entry-Exit Inspection and Quarantine Industry Standard Chemistry of chemical gases and gas mixtures Instability classification method China Standard Press Publishing First edition, June.2018

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard and the United Nations Handbook on Testing and Standards for the Transport of Dangerous Goods (Recommendationsonthe TRANSPORTOFDANGEROUSGOODSManualofTestsandCriteria) (Revision 6) related to the technology Consistent. This standard has the following structural and editorial changes. --- According to actual needs, increased the initial pressure, explosion pressure, pressure rise ratio three definitions; ---The unit of measurement has been changed into the legal unit of measurement in China; --- Increased the classification of chemically unstable gases by GHS. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Tianjin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Li Ningtao, Yu Yanjun, He Cheng, Zhao Chen, Han Wei, Zhang Ying. Chemical gas and gas mixture Chemical instability classification method

1 Scope

This standard specifies test methods and classification criteria for chemically unstable gas and gas mixtures. This standard applies to one of the flammable gases in the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS) (Revised 6) Additional sub-categories - Determination and classification of chemically unstable gases. This standard does not apply to the determination of the decomposition of gases under process conditions in chemical plants and the risks that may occur between gases in a gas mixture. Risk response.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB 30000.3-2013 Classification and labelling of chemicals - Part 3. flammable gas ISO 10156 gas and gas mixture for the determination of gas combustion potential and oxidizing capacity for the selection of cylinder valve outlets (Gases Andgasmixtures-determinationoffirepotentialandoxidizingabilityfortheselectionofcylindervalve Outlets) BSEN1839 Determination of gas and vapor explosion limits (Determination ofexplosionlimitsofgasesand Vapours) ASTME918-83 Procedure for the determination of flammability limits for chemicals at elevated temperatures and pressures (Standard Practice for Determi- ningLimitsofFlammabilityofChemicalsatElevatedTemperatureandPressure) United Nations Handbook of Tests and Criteria for Recommendations on the Transport of Dangerous Goods (Revision 6) United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS) (6th revised edition)

3 Terms and definitions

United Nations Manual on Recommendations for Testing and Criteria for the Transport of Dangerous Goods (Revised 6) and the Globally Harmonized Classification of Chemicals and The following terms and definitions are defined in the Labeling System (GHS) (Revision 6) and apply to this document. 3.1 Chemically unstable gas chemicalyunstablegases A flammable gas that reacts extremely quickly even in the absence of air and/or oxygen. Note. Mixtures where hazardous reactions occur between components (such as flammable gases and oxidizing gases) should not be considered chemical instability as referred to in this standard. gas. 3.2 Chemical instability The gas or gas mixture can be decomposed by decomposition even in the absence of any associated conditions (such as air or oxygen) The temperature and/or pressure rises and a dangerous reaction occurs.

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