Testing method for classification of chemical hazards—Fire potential and oxidizing ability of gases and gas mixtures

GB/T 27862-2011 Test methods for hazardous classification of chemicals Combustion potential and oxidizing power of gases and gas mixtures GB/T27862-2011 Standard compression package decompression password: www.bzxz.net
This standard specifies the test method for the flammability of gases or gas mixtures in air and the oxidizing power under atmospheric conditions. This standard applies to the classification of gases and gas mixtures, including the selection of cylinder valve exhaust ports. This standard does not apply to gases and gas mixtures at other ambient pressures and temperatures. ||
tt||This standard was drafted in accordance with the rules given in GB/T1.1-2009. This
standard uses the translation method and is equivalent to ISO10156:2010 "Selection of cylinder valve exhaust ports for gases and gas mixtures by determining the combustion potential and oxidizing power".
This standard has been edited as follows:
———The name has been changed to "Test Methods for Hazard Classification of Chemicals - Combustion Potential and Oxidation Capacity of Gases and Gas Mixtures".
This standard was proposed and managed by the National Technical Committee for the Administration of Hazardous Chemicals (SAC/TC251). The
drafting units of this standard: Shandong Entry-Exit Inspection and Quarantine Bureau, Jiangsu Entry-Exit Inspection and Quarantine Bureau, National Hazardous Chemicals Quality Supervision and Inspection Center.
The main drafters of this standard: Tang Zhixu, Luo Xin, Xu Qin, Niu Zengyuan, Li Xiaofeng, Pang Shiping, Zhu Yan.

1cS13.300
National Standard of the People's Republic of China
GB/T27862—2011/ISO 10156:2010 Testing method for classification of chemical hazards-.Fire potential and oxidizing ability of gases and gas mixtures(IS0 10156,2010,Gases and gas mixtures—Determination of fire potential and axidizing abiliry for the selection of cylinder valve outlets,IDT)
Issued on December 30, 2011
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on August 1, 2012
This standard was drafted in accordance with the rules given in GB/T1.1-2009. GB/T27862-2011/IS010156:2010 This standard uses the translation method and is equivalent to ISO10156:2010 "Selection of cylinder valve exhaust ports for gases and gas mixtures by determining their combustion potential and carrying capacity".
This standard has been edited as follows:
--The name is changed to "Test Method for Hazard Classification of Chemicals - Combustion Potential and Oxidizing Power of Gases and Gas Mixtures". This standard is proposed and managed by the National Technical Committee for Standardization of Hazardous Chemicals Management (SAC/TC251). The drafting units of this standard are: Shandong Exit-Entry Inspection and Quarantine Bureau, Jiangsu Exit-Entry Inspection and Quarantine Bureau, and National Hazardous Chemicals Quality Supervision and Inspection Center.
The main drafters of this standard are: Dang'e Xu, Luo Xin, Xu Qin, Niu Zengyuan, Li Xiaofeng, Pang Shiping, and Zhu Yan. TTTKANYKACA
GB/T27862--2011/ISO10156+2010 Introduction
ISO5145 Selection and sizing of gases and gas mixtures at the exhaust port of cylinder valves Other similar standards establish practical criteria for determining cylinder outlet connections. These parameters are based on fixed physical and chemical properties of the gases. Flammability and oxidizing potential in air are specifically considered. For pure gases, there is a large amount of data in the literature, the differences in which depend on the test methods. For mixed gases, the data in the literature are often incomplete or even unavailable. This is a difficult aspect of the application of this standard. The primary goal of this standard is to eliminate ambiguities in the literature and to supplement the existing data on mixed gases. In addition to the selection of cylinder valve exhaust ports, the later ISO 10156 was used for other purposes, such as establishing flammability and oxidizing potential data for international transport under the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) and for warning labels in the Dangerous Substances Regulations. Revision of the second edition of this standard began in 2006. In 2010, the previous version and ISO 10156-2 were merged, and the flammability and oxidizing data were updated.
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1 Scope
GB/T278622011/IS010156:2010
Test methods for hazardous classification of chemicals
Combustion potential and oxidizing capacity of gases and gas mixtures This standard specifies the test method for the flammability of gases or gas mixtures in air and the oxidizing capacity under atmospheric conditions. This standard applies to the classification of gases and gas mixtures, including the selection of cylinder valve exhaust ports. This standard does not apply to gases and gas mixtures at other ambient pressures and temperatures. 2 Definitions and terms
2.1 Terms and definitions
The following terms and definitions apply to this document. 2.1.1
Combustible gas or gas mixture in air gs or gas mixture flanmahle in air at atmospheric pressure and 20 ℃, a gas or gas mixture that can be ignited in air. 2.1.2
lower flammability limit in airlower flammability limit in airThe lowest concentration of a gas or gas mixture at the beginning of flame propagation in a homogeneous mixture with air. Note: The lower flammability limit is measured under atmospheric conditions. 2.1.3
upper flanumability limit in airThe maximum concentration of a gas or gas mixture at the beginning of flame propagation in a homogeneous mixture with air. Note: The upper flammability limit is measured under atmospheric conditions. 2, 1, 4
flammability rangeflammability rangeThe concentration range between the lower flammability limit and the lower flammability limit. Note: In this standard, the "flammability range" is also called the "flammability range". 2.1.5
gas or gas mixture that is more oxidizing than air air Gas or gas mixture with an oxygen content of more than 23.5% in the oxidant at atmospheric pressure that can sustain combustion. 2.2 Symbols
The following symbols apply to this document.
A: mole fraction of flammable gas in the mixed gas B: mole fraction of inert gas in the mixed gas C: oxygen fraction coefficient
F: i-th flammable gas in the mixed gas
I: i-th inert gas in the mixed gas
n: number of flammable gases in the mixed gas
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GB/T27862—2011/IS010156:2010P: number of inert gases in the mixed gas
K: number of inert gases Gas equivalence coefficient
A.: Fraction of flammable gas
L.: Lower flammable limit of flammable gas
T: Maximum value of non-flammability when flammable gas and a certain amount of nitrogen are mixed i: Mole fraction of fluorinated component
Ne: Hydrogen
Kr: Hydrogen
Nz: Nitrogen
H.: Hydrogen
O: Oxygen
CO Carbon dioxide
SO2+ Bowl of dioxide
NO, Hydrogen oxide
SF Sulfur hexafluoridewww.bzxz.net
CF: Tetrafluoromethane
C, Fs: Octafluoropropane
CH.: Methane
Note: The percentages of all gases in this standard are expressed in mole fractions (%), equivalent to the volume fraction (%) under atmospheric conditions, 3 Flammability of gases and gas mixtures in air 3.1 Overview
The following clauses describe the test and calculation methods for determining whether a gas or gas mixture is flammable in air. The calculation method mentioned in 3.3 can only be used when reliable engineering (or engineering) values ​​are available. When T. (or L,> values ​​are not available, the test method should be used in all cases.
3.2 Test method
3.2.1 Safety points
The test should be carried out by trained and competent personnel in accordance with the procedures of 3.2.4. The reaction tube and flow meter should be adequately identified to protect personnel in the event of an explosion. Personnel should wear safety glasses during the ignition process. During the process, the reaction tube should be opened in the atmosphere and isolated from the supply gas. Protective measures should also be taken when analyzing the test gas or mixture. 3.2.2 Principle
The gas or gas mixture is mixed with air to the ideal ratio, and the test mixture is ignited by electric spark under static conditions to observe whether the flame propagates through the reaction tube.
3.2.3 Equipment and materials
The instrument (see Figures 1 and 2) includes:
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a) Mixing tube,
b) Test tube for reaction;
c) Ignition system;
d) Analysis system for determining the composition of the test gas GB/T27862-2011/IS010156:2010 Note: Equivalent alternative instruments described in the standard test methods for determining the explosion limit may be used, such as ASTME681 and EN183913 - Gas discharged to the atmosphere; 2. Analysis; Mixer; Flow meter, Test gas: Compressed air: Safety device (pressure relief cabinet): Analysis; Valve; Incineration; Thermocouple: Heat-resistant glass tube 1 m long, 50 mm diameter Door.
Figure 1 Instrument using heat-resistant glass tube and temperature measuring probe 3
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CB/T27862—2011/ISOt0156:20101
Mixed gas analyzed and discharged into the atmosphere: Ignition electrode:
Gas mixture released during the test,
High-voltage transformer:
Time switch:
Mixture containing % test gas
Line area;
Test gas,
9 -…-Metering pump 1x%
Metering pump 2y%;
Gas control:
Combined
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