GB/T 16425-2018 English PDF

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GB/T 16425-2018: Determination for minimum explosive concentration of dust clouds
Status: Valid

GB/T 16425: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 16425-2018	119	Add to Cart	3 days	Determination for minimum explosive concentration of dust clouds	Valid
GB/T 16425-1996	279	Add to Cart	3 days	Determination for minimum explosive concentration of dust cloud	Obsolete

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Basic data

Standard ID: GB/T 16425-2018 (GB/T16425-2018)
Description (Translated English): Determination for minimum explosive concentration of dust clouds
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C67
Classification of International Standard: 13.230
Word Count Estimation: 6,693
Date of Issue: 2018-12-28
Date of Implementation: 2019-07-01
Older Standard (superseded by this standard): GB/T 16425-1996
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16425-2018: Determination for minimum explosive concentration of dust clouds

---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.
Determination for minimum explosive concentration of dust clouds ICS 13.230 C67 National Standards of People's Republic of China Replace GB/T 16425-1996 Dust cloud explosion lower limit concentration determination method Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 16425-1996 "Determination method of lower limit concentration of dust cloud explosion", compared with GB/T 16425-1996, the main The technical changes are as follows. --- Revised scope (see Chapter 1, Chapter 1 of the.1996 edition); --- Added a chapter on normative references (see Chapter 2); --- Revised the definitions of the terms "dust", "combustible dust" and "lower explosive concentration" (see Chapter 3, Chapter 2 of the.1996 edition); --- Revised the overview of the test device (see 4.1, 3.1 of the.1996 edition); --- Increased the design of the tank design pressure in the test device (see 4.2); --- Revised the provisions on the energy and quality of the ignition source in the test device (see 4.2, 3.2 of the.1996 edition); --- Removed the ignition source performance test in the test device (4.2 edition of.1996); --- Revised the test conditions and requirements (see 5.1, 4.1 of the.1996 edition); --- Modified the determination of the lower explosive concentration (see 5.2, 4.3 edition of.1996); --- Added chapter on security measures (see Chapter 7); --- Added the moisture content of the sample in the content of the test report (see Chapter 8). Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard was proposed by the Emergency Management Department of the People's Republic of China. This standard is under the jurisdiction of the National Safety Production Standardization Technical Committee (SAC/TC288). This standard was drafted. China Coal Science and Technology Group Chongqing Research Institute Co., Ltd., Shanghai Chemical Research Institute. The main drafters of this standard. Ma Zhongbin, Li Runzhi, Zhang Yinhe, Xiao Qiuping, Si Rongjun. The previous versions of the standards replaced by this standard are. ---GB/T 16425-1996. Dust cloud explosion lower limit concentration determination method

1 Scope

This standard specifies the test device, test procedure, and other alternative test methods for the determination of the lower explosive concentration of dust-air mixture. Safety measures and test reports. This standard applies to combustible dust that relies on oxygen in the air to maintain its oxidation reaction. This standard does not apply to explosives or substances that can be burned without relying on oxygen in the air.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 15604 dust explosion-proof terminology

3 Terms and definitions

The following terms and definitions as defined in GB/T 15604 apply to this document. 3.1 Dust dust Fine solid particles. 3.2 Combustible dust combustibledust Dust that can be exploded by violent oxidation reaction with the combustion-supporting gas. 3.3 Lower explosive concentration minimumexplosibleconcentration Cmin The lowest concentration of dust cloud that can occur in a self-sustaining combustion under the action of a given energy ignition source.

4 test device

4.1 Overview The test device is suitable for measuring the lower explosion concentration of combustible dust having a particle size of not more than 75 μm and a water content of not more than 5%. actual On the other hand, if the dust with a larger particle size or higher moisture can be effectively diffused in the explosion tank, the device can be used for the determination of the dust of the test dust. The degree distribution and moisture should be representative of the particle size distribution and moisture of the substance used. 4.2 device The device consists of a spherical stainless steel explosion tank with a volume of 20L. The schematic view is shown in Figure 1. The tank design pressure is ≥2.0MPa. burst A dust diffuser is arranged in the lower part of the fryer, and the diffuser communicates with the dust tank through the pipeline, and a solenoid valve is arranged on the connected passage. Dust tank volume It is 0.6L. A pressure sensor is attached to the wall of the explosion tank, and the sensor is connected to the recorder. ......

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