This standard specifies the terms and definitions, requirements, tests, marking and labeling, and inspection rules for solid inorganic nitrate dangerous goods. This standard applies to the inspection of solid inorganic nitrate dangerous goods (except ammonium nitrate). GB 19456-2004 Safety specification for inspection of hazardous properties of dangerous goods of nitrates GB19456-2004 Standard download decompression password: www.bzxz.net

ICS13.300
National Standard of the People's Republic of China
GB 19456—2004
Hazardous properties of dangerous goods for nitrates
Safety code for inspection
Safety code for inspection of hazardous properties of dangerous goods for nitrates2004-03-04Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2004-10-01Implementation
Chapter 4, Chapter 5, Chapter 6 and Chapter 7 of this standard are mandatory. The rest are recommended. GB19456—2004
The consistency of this standard with the United Nations "Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria" (4th revised edition) is not equivalent. Its relevant technical contents are consistent with the above regulations. The standard text format has been abbreviated and modified according to GB/T1.1·2000. This standard is proposed and managed by the National Technical Committee for Standardization of Dangerous Chemicals Management (SAC/TC.251). The responsible drafting unit of this standard is the Dangerous Goods Central Laboratory of the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, and the participating drafting units of this standard are: Tianjin Exit-Entry Inspection and Quarantine Bureau of the People's Republic of China, Asia-Pacific Dangerous Goods Association, and Jiangnan University. The main drafters of this standard are: Wang Libing, Gao Weiping, Liu Shaocong, Sun Shujun, Zhao Haolibao, and Zhang Bao. This standard is formulated for the first time.
1 Scope
Safety specification for inspection of hazardous properties of dangerous goods of nitrates GB19456-2004
This standard specifies the terms and definitions, requirements, tests, marking and labeling, and inspection rules for solid-state photomechanical nitrates. This standard applies to the inspection of solid inorganic nitrates (except ammonium nitrate) dangerous goods. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For dated references, all subsequent amendments (excluding errata) or revised versions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest versions apply to this standard. GB19458-2001 General Rules for Safety Specifications for Dangerous Characteristics of Dangerous Goods United Nations Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria (3rd Static Edition) 3 Terms and Definitions
The following terms and definitions established in GB19458-2004 apply to this standard. 3.1
Oxidizing solid
Solid material that can increase the burning rate or burning intensity of a combustible material when completely mixed with the combustible material. 4 Requirements
4.1 The material to be used in the form of transport should be checked to see if it contains particles with a true diameter of less than 500μm. If the powder with a diameter less than 500 μm accounts for more than 10% of the total mass, or if the material is brittle, all test samples should be ground into powder before the test to take into account the reduction of the particle size of the cargo during loading, unloading and transportation. 4.2 The test needs to be carried out in a fume hood or other ventilated area with a certain degree of ventilation and an air flow rate of 0.5 m/s or less. The smoke exhaust system is suitable for absorbing toxic fumes.
4.3 The solid oxidizing test is carried out at a normal temperature of 20℃±5℃. 4.4 Different types of oxides should be stored and transported in appropriate storage and transportation locations according to their properties and fire extinguishing methods. 4.5 The storage and transportation locations should be cleaned and washed before and after storage and loading and unloading to prevent the mixing of impurities such as organic and flammable materials. 4.6 The storage and transportation locations should be away from fire, heat and water sources and prevent sunlight exposure. 4.7 During loading, storage and transportation, throwing, dropping, overturning, dragging and other methods are not allowed. Try to avoid friction, collision and explosion. 4.8 The marks, signs and dangerous goods color labels cast, printed or pasted on the nitrate packaging should be clear and meet the relevant requirements of GB19458-2004. 5 Tests
5.1 Test items
Oxidizing solid test:
5.2 Sample numberwww.bzxz.net
Randomly select 500g of representative substances from the materials to be tested for dangerous characteristics detection. 5.3 Equipment and materials
5.3.1 Potassium nitrate reference material: sieved particle size 0.15 mm~0.3 mm, industrial pure. Dry at 65℃ to constant weight for at least 12 hours), 1
GB19456-2004
Then put it into a desiccator (with desiccant), cool it down and set it aside. 5.3.2 Fiber: Length 50m~250m. Average diameter 25m. Make the fiber into a thin layer with a thickness of no more than 25mm, dry it at 103℃ to constant weight (at least 4 hours), then put it into a desiccator (with desiccant), cool it down and set it aside. The moisture content should be less than 0.5% by mass, and the drying time can be extended if necessary. 5.3.3 Ignition source: that is, the inert metal wire connected to the power supply should meet the following characteristics: a) Length = 3 cm + 1 cm:
Diameter = 0,60mm±0.05mm
Resistance = 6.0 0/m±0.5 0/m:
Power consumption of metal wire = 150W-7W;
The shape of the metal wire is shown in Figure 1.
B Heating metal wire;
Low thermal conductivity flat plate.
Figure 1 Test plate and ignition metal wire
Glass funnel: A 60\ glass funnel with one end closed and an inner diameter of 70) mm. Test plate: The test plate should be transparent and meet the following requirements: length = 150 mm; width = 150 mm: thickness = 6 mm: thermal conductivity (°C): 0.23 W/(K). 5.4 Test procedure 5.4.1 30.0 More than 0.1 g of the reference material (cellulose mixture) is prepared according to the mass ratio of potassium urate to cellulose of 3:7, 2:3 and 3:2. 30.0 Three 0.1 g of the test material (whose particle size is the particle size to be used for transportation) and the cellulose mixture are prepared according to the weight ratio of sample to cellulose of 4:1 and 1:1. Each mixture should be mixed as thoroughly as possible by mechanical means without being too rough. 5.4.2 Use a glass funnel to make the mixture into a 70 mm diameter glass funnel. The truncated cone is placed on a circular ignition wire placed flat on a low thermal conductivity flat plate.
GB19456—2004
5.4.3 The ignition wire is connected to a power source and remains energized during the test. If the mixture does not ignite and burn, it is kept energized for 3 minutes. The burning time recorded is from the power supply being turned on to the end of the main reaction (such as flame, glowing or flameless combustion). Intermittent reactions after the main reaction, such as sparks or crackling responses, are not considered. If the heating wire breaks during the test, the test should be repeated. Five parallel tests should be carried out for each sample.
5.5 Determination
Perform experiments in accordance with Clause 5.4 of this standard to determine whether the dangerous goods should be classified as oxidizing substances in Class 5.1 and classify the hazard levels according to Table 1.
Capsule 1 Whether dangerous goods should be classified as 5.1 The average burning time of samples tested for oxidizing substances and applicable packing groups in a 4:1 or 1:1 ratio of fiber to cellulose by weight is not greater than the average burning time of a mixture of potassium bromate and cellulose in a 3:2 weight ratio. Not greater than the average burning time of a mixture of potassium bromate and cellulose in a 2:3 weight ratio and not meeting the criteria for packing group I. Not greater than the average burning time of a mixture of potassium bromate and cellulose in a 3:7 weight ratio and not meeting the criteria for packing groups I and II. Does not ignite or burn, and is greater than the average burning time of a mixture of potassium bromate and cellulose in a 1:1 weight ratio. Marking and labelling 6.1 Marking Whether it should be 5. 1
Oxidizing substances
Not classified under 5.1
Oxidizing substances
Hazard level
Highly dangerous
Moderately dangerous
Lowly dangerous
Applicable packing group
Class packing
Class packing
and Class packing
The proper shipping name of the oxidizing dangerous goods and the corresponding UN number "JN\" shall be marked on each package of the goods. Example: Zinc oxide, UN 2469
6.2 Labels
6.2.1 Label shape: A 45-degree square (diamond) with a minimum size of 100 mm x 100 mm, except where the size of the package allows only a smaller label to be attached. Along the edge of the label there is a line of the same color as the symbol, 5 mm from the edge. 6.2.2 The label is divided into two halves, with a yellow background. The upper half is a graphic symbol, i.e. a flame on a circle, in black; the lower half is the mathematical symbol "51\ written in the bottom corner. See Figure 2 for an example of a label. Figure 25. 1 Label for Oxidizing Solids
6. 2. 3 If the substance has a subsidiary hazard, the label should be listed together with the oxidizing label. 6.2.4 Label location:
GB19456—2004
a) If the package is large enough, it should be affixed to the surface of the package near the formal shipping name mark; h)
It should be affixed to the container and will not be covered by any part of the container or container accessories, or any other label or mark; When the primary hazard label and the subsidiary hazard label are listed at the same time, the two should be affixed closely: e
When the package is irregular in shape or too small to be satisfactorily attached with a label, the label can be hung on the package with a secure tag or other device.
Based on the test results, for oxidizing solid substances classified as 5,1, the corresponding label should be affixed. The label is shown in Figure 2. 6. 2. 5
7 Inspection rules
7.1 Inspection items
Inspect item by item according to the requirements of Chapter 4, Chapter 5 and Chapter 6 of this standard. 7.2 Inspection conditions for hazardous characteristics
Inspection of hazardous characteristics should be carried out in any of the following situations: - When a new product is put into production or an old product is converted to another product; - After formal production, if there are major changes in materials and processes that may affect product performance; - Once every six months in normal production; - When the product is resumed after a long-term shutdown; - When the factory inspection results are significantly different from the last performance inspection results; The national quality supervision agency proposes to conduct an inspection. 7.3 Judgment rules
Inspect one by one according to the requirements of the standard. It is recommended that if one sample fails for each item, the item is judged as unqualified. If one item fails, the batch of products is assessed as unqualified.
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