联合国危险货物运输专家委员会（TDG）第41次会议提案20
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Committee of Experts on the Transport of Dangerous Goods and on the Globally Harmonized System of Classification and Labelling of Chemicals
Sub-Committee of Experts on the Transport of Dangerous Goods
Forty-first session
Geneva, 25 June – 4 July 2012
Item 2 (f) of the provisional agenda
Explosives and related matters: miscellaneous
Classification of ammonium nitrate
Transmitted by the Australian Explosives Industry Safety Group (AEISG)
Introduction
1. The purpose of this paper is to ensure ammonium nitrate, which does not meet one or more of the existing classification criteria, is covered by the Model Regulations on the Transport of Dangerous Goods, and handled accordingly.
2. There are two entries for ammonium nitrate in the Dangerous Goods List in Chapter 3.2 of the Model Regulations, namely,
UN No. Name and description Class or division Subsidiary risk UN packing group Special provisons Limited and excepted quantities Packagings and IBCs Portable tanks and bulk containers Packing instruction Special packing provisions Instructions Special provisions 1942 AMMONIUM NITRATE, with not more than 0.2% total combustible material, including any organic substance, calculated as carbon to the exclusion of any other added substance 5.1 III 306 5 Kg EI P002 B3 TI TP33 0222 AMMONIUM NITRATE with more than 0.2% combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance 1.1D 0 E0 P112(b) PP47
3. As defined above, UN1942 is used for Ammonium Nitrate with not more than 0.2% carbon, and which does not exhibit explosive properties when tested in accordance with Test Series 1 and 2 (refer SP306).
IBC08
LP02
BK1
BK2
BK3
P112(c)
4. UN0222 is used for Ammonium Nitrate with more than 0.2% carbon, regardless of its behaviour in Test Series 1 and 2.
Discussion
5. While the determining factor for classification with entry UN0222 is the carbon content alone, there are two factors for the entry UN1942 - both the carbon content and the satisfactory performance in Test Series 2.
6. This raises a potential, and not unlikely, situation where Ammonium Nitrate, with not more than 0.2% carbon, does not satisfy Test Series 2 and therefore cannot be accommodated within existing entries (refer table below).
|
Ammonium Nitrate |
UN TEST SERIES 2 | |
|
|
SATISFY |
NOT SATISFY |
|
Not more than 0.2% C |
UN1942 |
???? |
|
More than 0.2% C |
UN0222 |
UN0222 |
7. The potential for Ammonium Nitrate, of various types or from various sources, to fail Test Series 2 is not unlikely as shown by example results in Test Series 2 of the Manual of Tests and Criteria (e.g low density).
8. Should manufactured or imported Ammonium Nitrate not satisfy Test Series 2, but contain not more than 0.2% carbon as confirmed by analysis, there would remain a need to classify and appropriately handle such material.
Proposal
9. It is proposed to amend the entry for Ammonium Nitrate, UN0222, in Column 2 of the Dangerous Goods List to read:
“AMMONIUM NITRATE with more than 0.2% combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance
or
AMMONIUM NITRATE which has not satisfied Test Series 2”.
Alternative proposal
10. Alternatively, a Special Provision SPXXX could be added to Column 6 of the entry for UN0222. Such Special Provision to be added to Chapter 3.3 would read:
“This entry may also be used for Ammonium Nitrate which has not satisfied Test Series 2, regardless of carbon content.”
联合国危险货物运输专家和全球化学品统一分类和标签制度专家委员会
危险货物运输专家分委员会
第四十一次会议
日内瓦, 2012年6月25日 – 2012年7月4日
议程第2 (f) 项
爆炸物和相关内容: 杂项
硝酸铵的分类
由澳大利亚爆炸品工业安全组提交(AEISG)
介绍
1. 本提案旨在确保不符合现行分类标准的硝酸铵纳入《规章范本》范畴，以确保这类物质的正确使用。
2. 以下是《规章范本》3.2章危险货物列表中有关硝酸铵的两个条目：
联合国编号 名称和说明 类别或项别 次要危险性 联合国包装类别 特殊规定 有限和例外数量 包装和中型散货箱 便携式罐体和散装货箱 包装说明 特殊规定 说明 特殊规定 1942 硝酸铵，含以碳计算的可燃物质总量不大于0.2%，包括任何有机物质，但不包括任何其他添加物质 5.1 III 306 5 Kg EI P002 B3 TI TP33 0222 硝酸铵，含可燃物质大于0.2%，包括以碳计算的任何有机物质，但不包括任何其他添加物质 1.1D 0 E0 P112(b) PP47
3. 如上所述，UN1942适用于含碳不大于0.2%，并且根据试验系列1和2进行试验时不显示爆炸特性（见SP306）的硝酸铵。
IBC08
LP02
BK1
BK2
BK3
P112(c)
4. UN0222适用于碳含量大于0.2%的硝酸铵，而不管其在试验系列1和2中的结果如何。
讨论
5. 划为UN0222条目的决定因素只有碳含量一个，而在UN1942中却有两个——碳含量和2系列试验中阴性的试验结果。
6. 这就产生了这样一种可能的情况，碳含量不大于0.2%，并且没有通过试验系列2的硝酸铵无法对应现有的条目（见下表）：
|
硝酸铵碳含量 |
试验系列2 | |
|
|
通过 |
不通过 |
|
碳含量不大于0.2% |
UN1942 |
???? |
|
碳含量大于0.2% |
UN0222 |
UN0222 |
7. 正如《试验和标准手册》中试验系列2的结果实例所示，由于类型或者来源不同，硝酸铵通不过试验系列2并非不可能。
8. 实际生产或引进的硝酸铵通过分析其含碳量，可能并不大于0.2%，但却未通过2系列试验，此时仍有必要对该类物质进行分类，并确保物质的正确使用。
提议
9. 建议将硝酸铵UN0222条目第2栏作如下修改：
“硝酸铵，含可燃物质大于0.2%，包括以碳计算的任何有机物质，但不包括任何其他添加物质
或
硝酸铵，未通过试验系列2”
其他可选提议
10. 或者，在UN0222条目第6栏加入一个特殊规定SPXXX，并将该特殊规定写入3.3章：
“该条目也适用于未通过试验系列2的硝酸铵（不考虑碳含量）。”