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GB/T 21756-2008: Chemical products for industrial use -- Determination of relative temperature of spontaneous flammable of solids
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21756-2008 | English | 169 |
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Chemical products for industrial use -- Determination of relative temperature of spontaneous flammable of solids
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GB/T 21756-2008
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Basic data | Standard ID | GB/T 21756-2008 (GB/T21756-2008) | | Description (Translated English) | Chemical products for industrial use -- Determination of relative temperature of spontaneous flammable of solids | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300 | | Word Count Estimation | 7,773 | | Date of Issue | 2008-05-12 | | Date of Implementation | 2008-09-01 | | Adopted Standard | NF T20-036-1985, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 7, 2008 (No. 120 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 specifies the determination of solid chemical products through spontaneous combustion temperature properties of a method. This standard does not apply to explosive products and at room temperature, spontaneous combustion products and air, as well as the method of experimental conditions melted solid product. | GB/T 21756-2008: Chemical products for industrial use -- Determination of relative temperature of spontaneous flammable of solids
---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 relative temperature of spontaneous flammable of solids
ICS 13.300
A80
National Standards of People's Republic of China
Chemical products for industrial use
Determination of relative autoignition temperature of solid matter
Posted.2008-05-12
2008-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard is identical with the French National Standard NFT20-036 "Determination of the relative auto-ignition temperature of solid products of chemical products for industrial use
Set "(September 1985) (French version).
For the convenience of use, this standard has the following editorial changes.
--- Increase the "Introduction" part of the French national standard NFT20-036 "chemical products for industrial use of solid relative to the auto-ignition temperature
Measurement "in" 0introduction "part of the" Introduction "part;
--- French National Standard NFT20-036 "Chemical products for industrial use Determination of the relative auto-ignition temperature of solid substances" "8BIB-
LIOGRAPHIE "part of the standard" reference "section.
This standard by the National Standardization Technical Committee of hazardous chemicals management (SAC/TC251) and focal point.
This standard is drafted by. Shenzhen Exit Inspection and Quarantine.
Participated in the drafting of this standard. Shanghai Exit Inspection and Quarantine.
The main drafters of this standard. Liu Zhihong, Zou Chunhai, Ren Cong, Chen Xiangyang, Zhang Zhufu, Liang Feng, Li Bin, Liu Li, Chen Xiang, Jiang Wei.
This standard is released for the first time.
Introduction
In the implementation of this standard determination, it is recommended to first grasp the potential for spontaneous combustion and explode the nature of the product information.
This method provides preliminary data on the spontaneous combustion of solid products caused by high temperatures; in fact, if the product reacts with oxygen or exothermes
The heat generated by the solution does not dissipate quickly enough in free space and its self-heating will drive the product to autoignition.
Taking into account the complexity of combustion and combustion of solids, the autoignition temperature determined according to this method is only used for comparative assessment.
Chemical products for industrial use
Determination of relative autoignition temperature of solid matter
1 Scope
This standard specifies the method by measuring the pyrophoric nature of solid chemical products by heating.
This standard does not apply to explosive products and products at room temperature and spontaneous combustion of air and the method of experimental conditions, the melting of solid
Body Products (eg Surfactant etc.).
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Under normal conditions, a certain volume of spontaneous combustion of the product temperature, the minimum temperature is room temperature in degrees Celsius (℃) said.
3 principle
Place a defined volume of sample under test in the oven. Set the oven temperature to 0.5 ℃/min speed up until 400 ℃, of course
After the simultaneous determination of sample and oven temperature, respectively, when the sample self-heating reached 400 ℃ oven temperature, that is, the sample auto-ignition temperature.
4 device
4.1 oven, programmable temperature, 2L volume, with natural air circulation and explosion buffer device. Decomposition gas can not enter, contact electricity
Heat the resistor to avoid all the risk of explosion.
4.2 metal mesh cube, cut a piece of mesh width of 45μm stainless steel wire mesh. Fold the stainless steel mesh and use wire
Fix it open, ie, cube without top surface.
The unit is millimeter
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