Explosives, classification

The basis for the classification of explosives throughout the world is based upon conventions developed by the United Nations committee (UNO) on Transport of Dangerous Goods [5]. 

The United Nations system (UNO) divides hazardous materials into nine classes for the purpose of determining the degree of risk in shipping and transport. The order and number of the class are not meant to imply the degree of risk or danger. These classes are as follows  

Explosive substances and articles in Class 1 are assigned to one of six divisions, depending on the type of hazard. An explosive substance is defined as a solid or liquid substance (or mixtures of substances) that is in itself capable by a chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to the surroundings. Pyrotechnic substances are included even when they do not evolve gases. 

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Ignition of flammable Provide safe separation distances release resulting in fire. Develop appropriate area electrical or explosion. classification Provide ignition source control Place ignition sources in positive pressure enclosure and buildings Provide adequate ventilation API RP500 BS 5345 BS 5958 NFPA-70 NFPA-77... 

A high hazard process unit ha explosion classification under petrochemical schedule ol W or E-5. 

Richard P. Gen on i is a principal engineer with Duratek Federal Services Northwest Operations in Richland, Washington. Genoni maintains the Explosive Classification Tracking System for the Department of Energy s National Transportation Program and reviews all new explosive applications before submittal to the Department of Transportation. He also maintains Department of Energy Interim Hazard Classifications in accordance with the Department of Defense Ammunition and Hazard Classification Procedures, TB 700-2. 

Sensitivity Very low (requires primary explosive) Classification Secondary explosive... 

CAS 106602-80-6. A torpedo fuel that is easy to handle, has a non-explosive classification and a low fire hazard. Developed by Otto Reitlinger at the Indian Head Division Naval Surface Warfare Center during the 1960s. 

The first stage of a dust explosion hazard assessment is to determine whether the dust will explode when dispersed as a cloud. The combustibility of a dust can be assessed by conducting an explosion classification test on a representative sample of the dust. In this laboratory test the observation of flame propagation determines whether or not a suspended dust is capable of initiating and sustaining an explosion. It should be... 

The explosion classification test is usually conducted in a modified Hartmann tube apparatus. The apparatus consists of a 1.2 L vertical tube mounted onto a dust dispersion system. Dust samples of various quantities are dispersed in the tube and attempts are made to ignite the resulting dust cloud by a 10 J electrical arc ignition source. If the material fails to ignite in the modified Hartmann tube apparatus, the testing is continued in the 20 L sphere apparatus. Dust samples of various quantities are dispersed inside the sphere and are exposed to a 10,0001 ignition source. 

Acidity, as acetic acid, wt % 0.01 Bureau of Explosives Classification Nonhazardous Liquid... 

DOT and GHS explosive classification system recognizes that some kinds of explosives are not compatible with others. During transport or storage, placing incompatible explosives together increases their hazard level. In order to address this issue, DOT identifies 35 compatibility groups and charts the combination of the hazard divisions and compatibility groups. 

Many organizations in the U.S. adopted explosive classifications held by the U.S. Department of Transportation for many years prior to using the GHS classifications. The old classification system used three classes Class A, Class B, and Class C. DOT offers a conversion between the old... 

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