Science and Technology of Energetic Materials

Vol.67, No.2 (2006)

Research paper -Special Issue for ISEM 2005-

UN classification tests of fireworks and concrete cracker *
Ken Okada, Miyako Akiyoshi, Takehiro Matsunaga, and Mitsuaki Iida


From Jan. 2004, the confirmation of the package of explosives by the head of the domestic transportation department is needed during the transportation of ships in Japan. Concerning some explosives, a full scale UN test is needed. Concrete cracker and two types of toy fireworks (hand held torch and smoke) were selected as a UN full scale test sample. We have conducted the 6(a) and 6(c) test which is known as a single package test and a bonfire test, respectively. The UN 6(a) test is a test on a single package to determine if there is mass explosion of the contents. The UN 6(c) test is a test performed on packages of an explosive substance or explosive articles, or unpackaged explosive articles, to determine whether there is a risk of mass explosion or a hazard from dangerous projection, radiant and/or violent burning or any other dangerous effects when involved in a fire. In the UN 6(c) test, the thermal flux effect was evaluated by a radiometer and a burning time. As a result, concrete cracker is assigned to Division 1.4, both of the toy fireworks were assigned to Division 1.4 S.


UN classification test, Toy fireworks, Concrete cracker, Single package test, Bonfire test

* Selected papers presented at the 2nd International Symposium on Energetic Materials and their Applications (ISEM 2005).

* ISEM 2005に投稿された論文です。

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