This standard specifies the test method for the explosion hazard of industrial chemicals. This standard is applicable to testing whether solid, liquid, and paste chemicals have explosion hazards due to their thermal sensitivity or when they are subjected to impact or friction. This standard is equivalent to NF T20-038:1985 "Determination of the explosion hazard of industrial chemicals" (French version), and has made editorial modifications to the standard text format according to GB/T 1.1-2000. GB/T 21848-2008 Determination of the explosion hazard of industrial chemicals GB/T21848-2008 Standard download decompression password: www.bzxz.net
This standard specifies the test method for the explosion hazard of industrial chemicals. This standard is applicable to testing whether solid, liquid, and paste chemicals have explosion hazards due to their thermal sensitivity or when they are subjected to impact or friction. This standard is identical to NF T20-038:1985 "Determination of Explosion Hazards of Industrial Chemicals" (French version), and has made editorial modifications to the standard text format in accordance with GB/T 1.1-2000.

1CS 13.300
National Standard of the People's Republic of China
GB/T21848—2008wwW.bzxz.Net
Chemical products for industrial useDetermination of explosion risk2008-05-12Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2008-09-01Implementation
GB/T21848—2008
This standard is equivalent to NFT20-038:1985 (Determination of explosion risk of chemicals for industrial use (French version)) and has made editorial changes in the standard text format according to GB/T1.1-2000. Appendices A, B and C of this standard are informative appendices. This standard was proposed and developed by the National Technical Committee for Standardization of Dangerous Chemicals (SAC/TC251). The drafting unit of this standard is: Jiangsu Entry-Exit Inspection and Quarantine Bureau. The participating drafting unit of this standard is: Jiangxi Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard are: Zhu Yan, Gui Jiaxiang, Shang Guiqin, Li Jianjun, Lu Zhigang, Wang Hongsong, Gao Xiang. This standard is published for the first time.
Determination of explosion hazard of industrial chemicals This standard specifies the test method for explosion hazard of industrial chemicals: GB/T21848--2008
This standard is applicable to testing solid, liquid, and paste chemicals to determine whether there is explosion hazard due to their thermal sensitivity or under impact or friction.
2 Terms and definitions
The following terms and definitions apply to this standard. 2.1
Explosion products
Products that explode under flame or have a higher impact or friction sensitivity than 1,3-diphenylbenzene. 3 Method Summary
Take samples separately and test their thermal sensitivity, impact sensitivity and friction sensitivity in turn, and observe the explosion hazard of each test method. 4 Safety specifications
At the beginning of the test, take about 10rng of the sample and place it on the mouth of the Bunsen burner for direct heating, and use wooden and iron sticks to perform impact and friction tests. If the product is unstable and explosive, the experimenter should take special safety precautions to avoid physical damage. 5 Test methods
5.1 Thermal sensitivity test
5. 1. 1 Principle
Place the sample in a steel pipe with exhaust holes of different sizes, heat the pipe body, and observe the damage of the pipe body by the explosion. 5.1.2 Reagents and materials
Fuel gas, industrial alkane or other equivalent gases. 5.1.3 Instruments and equipment
5.1.3.1 Stainless steel tube: Use stainless steel tube with inner diameter of 24mm, length of 75mm and wall thickness of 0.5mm obtained by drawing and stamping steel plate (see Appendix A). A steel plate with vent holes should be installed at its open end to prevent pressure: the steel plate is fixed to the pipe mouth by two-part screw joint (open nut and closed nut). 5.1.3.2 Steel plate with circulating gas outlet (see Appendix A): high-strength chrome steel, thickness 6 mm, with small holes of different diameters, ($2 mm, $2.5 mm, ±3 mm, 9 mm, ±5 mm, $6 mm, $8 mm, $10 mm, 912 mm, 514 mm, 916 mm, $18 1 mm, $20 mm).
5.1.3.3-Open nut and closed nut (see Appendix): made of chrome steel, which will not cause sparks when the temperature rises to 800℃. 5.1.3.4 Metal tester: see Appendix B for dimensions. 5.1.3.5 Propane burner: see Appendix C for dimensions. 5.1.3.6 Wooden piston: cooking diameter 20 mm.
5. 1, 4 Operation steps
5.1.4.1 Sample preparation
Place three samples of equal mass in the stainless steel tube (5.1.3.1) until the height is 60 mm; use a wooden piston to gently compact the sample with a force not exceeding 1
GB/T 21848—2008
80N. If the sample is a paste, be careful to avoid bubbles. 5.1.4.2 Test
According to the situation, at least two series of tests shall be carried out: each series shall be tested up to three times. For the first series of experiments, a steel plate with a small hole of 2 mm in diameter (5.1.3.2) is fixed at the mouth of the stainless steel tube containing the sample (5.1.3.1). If it is necessary to do a second series of experiments, a steel plate with a small hole of 2 mm in diameter (for example, 6 mm) needs to be fixed (5.1.3.2). The closed tube is placed in a metal testing instrument (5.1.3.4). Four pseudo-alkane burners are used to surround the test steel tube and heat it at a speed of 3.2 L/tmin at a pressure below 500 hPa (see Appendix B). The flame is adjusted to heat the tube body evenly with a blue flame: 5min shop. If no explosion occurs during this period, operate the next two prepared experiments to complete the first series of experiments and the second series of experiments. In the second series of experiments, a new sample must be used for each operation. If an explosion occurs within 5min and the tube body is exploded into 3 or more pieces, it is determined to be an explosion and no subsequent tests are required.
5.1.5 Expression of results
The sensitivity of the product to impact is determined by the actual results obtained through a series of tests (at least 6 times). Whether the product is sensitive to impact after heating
5.2 Impact sensitivity test
5.2.1 Principle
Pour the sample into a
5.2.2 Apparatus and equipment
5.2.2.1 Impact equipment
5. 2. 2. 1. 1
real instrument and observe whether there is an explosion or a fire equivalent to an explosion after a free fall drop test. Gray pin iron (length 230mm, width 250mm, height 200mb) and a quick-cast body (year 450mm, width 450mm piece
height 50mm) support
5.2.2.1.2 in the casting
seamless steel pipe.
5.2.2. 1.3
stick (100mm diameter, 70-mm high)
fixed with screws on the back
deep fire steel tamping with
03~153) hardness is
concrete cube, and then
5.2.2.2 mold
is made of two braided fire steel
fast supports, and
root ... The straight track is fixed with screws on the vertical track and consists of coaxial rollers. One is placed in the other roller, which plays the role of a guide sleeve. The dimensions of the two coaxial rollers are 800mm×600mm×600mm. These two rollers are then placed together on another hollow roller with an outer diameter of 10.003mm and an inner convex surface (with a smooth surface and a hardness of HRC 3-153). The annular ridge (circular radius is 0.5mm).
p10mm10.005mm, height 13mm, smooth meat 5.2.2,3 middle steel
height 26 mm, through
5.2.3 operation steps
5.2.3.1 sample preparation
height 10mm, surface
the scale of the hollow roller is
the center ring and a stop ring adjust the axis to eliminate the gas produced by the explosion 5.2.3.1.1 solid state: the sample is sieved with a sieve with a sieve aperture of 500μm in accordance with NFX11-501 standard. If the sample is in a quick or milky state, it is reduced to powder and sieved for the experiment. 5.2.3.1.2 state: inject the sample into the steel roller (5.2.2.2) until it is ! mm away from the inner roller, and keep it in place. 5.2.3.2, Test
Example 40μ1. Sample to the mold (5,2.2.2), according to the situation, up to six tests, the tamping chain (5.2.2.1.3) dropped from a height of 400mm, hit the mold (5.2.2.2) containing the sample, and if an explosion or flame occurs, the next test should be stopped immediately. In this case, a new series of tests are needed to replace this set of molds.
5.2.4 Expression of results
Whether the sample has an explosion hazard after mechanical impact depends on the actual results obtained through a series of tests (at least 6 times). 2
5.3 Friction sensitivity test
5.3.1 Principle
CB/T 21848--2008
Place the sample on an uneven plate, rub the sample back and forth on the surface while maintaining a constant force, and observe the generation of explosion or flame equivalent to explosion.
5.3.2 Instruments and equipment
5.3.2.1 Friction equipment includes:
5.3.2.1.1 A friction device fixed on the cast iron base. 5.3.2.1.2 White porcelain rod: 15 mm long, 10 mm in diameter, with a rough spherical end (arc radius 10 mm), the rate of change must be less than 360 N.
Removable porcelain plate, 25 mm long, 25 mm wide, 5 mm thick, the surface of the porcelain plate is as uneven as possible (grain depth 5. 3. 2. 1. 3
fixed in a sliding cream that can slide back and forth in two tracks, the sliding groove is driven by an electric motor with a depth of 9 μm~32 μm). The plate
pulley and a gear transmission system. The porcelain core is driven by a transmission rod in a range of 10 mm, including
m.
5.3.3 Operation steps
5.3.3.1 Preparation of samples of solid products
The samples are sieved
for the experiment.
5.3.3.2 Test
Sieve 10
through a 500m sieve perpendicular to the moving direction. If the sample is blocky or emulsion, first select it into powder and sieve it with electricity
. Place the paste or liquid sample on a part of the plate, and pay attention to the concave and half of the horizontal lines of the porcelain plate and the movement of the porcelain plate. Place the friction sample on the sample and apply a vertical force of 360N during the friction. Manual instrument, ensure the friction support
, and make the porcelain plate reciprocate at a distance of 10mm within 44s. According to the situation, the cylinder and the sample
are reversed at most 6 times each time.
If an explosion or flame occurs on the same porcelain plate
, stop the test immediately. 5.3.4 Expression of results Whether the product is explosive after exposure depends on the test results obtained through a series of experiments (at least 6 steps). 5.3.5 Test report The test report should include the following parts: 8) Detailed information of the sample (physical form, moisture, impurities, etc.); b) Test method; Preparation of the test sample (reduction, filtration); Type of instrument used; Phenomena observed during the test (type, number of flames, flames, explosions, fragments); Results of each test; Detailed report of all special circumstances that occurred during the test! Report on all operations that are not foreseen in the current standard or all operations that are performed at random. 3
GB/T 21848-2008
Appendix A
(Informative Appendix)
Schematic diagram of open nut and closed nut
h-1 heart or Yi 20
M35XL5
Schematic diagram of open screw width and closed nut
Unit is kilo
Appendix B
(Informative Appendix)
Schematic diagram of metal testing instrument
Figure B.1 Schematic diagram of metal separation testing instrument
GB/T 21848—2008
Unit is flow
GB/T 21848—2008
Appendix C
(Informative Appendix)
Schematic diagram of propane burner
Figure C.1 Schematic diagram of propane burner
Unit: millimeters
Figure C.2 Schematic diagram of propane burner
GB/T 21848-2308
Unit: millimeters
GB/R 21848—2008
References
NFA53-153 Rockwell hardness test for metallic materials]
Bulletin of the National Bulletin ... 3
Testing the nominal size of the holes in screens, metal mesh, perforated metal and electroformed sheetsArticle 82-905 of the Law amending Articles 77-771 of October 21, 1982 (see Council Directive 67/518E of 22 October 1982 of 27 July 1967 (Official Journal of the European Union L 196, 16 August 1967, p. 1); Council Directive 79/831 of 18 September 1979 (Official Journal of the European Union L 259, 15 October 1979, p. 10); Council Directive 84/449 of 75 April 1984 (Official Journal of the European Union L 251, 19 August 1984, p. 2) Copyright reserved. All rights reserved. No. 5: 1550661-32480
GB/T 21818-2008
Price:
8006--818162 Schematic diagram of propane burner
GB/T 21848-2308
Unit is tachometer
GB/R 21848—2008
References
NFA53-153 Rockwell hardness test for metallic materials]
Bulletin)
NF X I1-501 3
Testing the nominal size of the holes in screens, metal mesh, perforated metal and electroformed sheetsArticle 82-905 of the Law amending Articles 77-771 of October 21, 1982 (see Council Directive 67/518E of 22 October 1982 of 27 July 1967 (Official Journal of the European Union L 196, 16 August 1967, p. 1); Council Directive 79/831 of 18 September 1979 (Official Journal of the European Union L 259, 15 October 1979, p. 10); Council Directive 84/449 of 75 April 1984 (Official Journal of the European Union L 251, 19 August 1984, p. 2) Copyright reserved. All rights reserved. No. 5: 1550661-32480
GB/T 21818-2008
Price:
8006--818162 Schematic diagram of propane burner
GB/T 21848-2308
Unit is tachometer
GB/R 21848—2008
References
NFA53-153 Rockwell hardness test for metallic materials]
Bulletin)
NF X I1-501 3
Testing the nominal size of the holes in screens, metal mesh, perforated metal and electroformed sheetsArticle 82-905 of the Law amending Articles 77-771 of October 21, 1982 (see Council Directive 67/518E of 22 October 1982 of 27 July 1967 (Official Journal of the European Union L 196, 16 August 1967, p. 1); Council Directive 79/831 of 18 September 1979 (Official Journal of the European Union L 259, 15 October 1979, p. 10); Council Directive 84/449 of 75 April 1984 (Official Journal of the European Union L 251, 19 August 1984, p. 2) Copyright reserved. All rights reserved. No. 5: 1550661-32480
GB/T 21818-2008
Price:
8006--81816
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