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There are several types of locations in which it can be extremely dangerous to use any light that has not been specifically designed - and approved - for that kind of environment. These are areas where fire or explosion hazards may exist due to the presence of flammable gases, liquids, vapours, dusts, or ignitable fibers or flyings.
The following guide will assist you in determining the proper flashlight to use for your specific requirements and will be helpful in ensuring that your light is safety-rated for your environmental needs.
Classes are separated into three distinct groups based on the type of flammable material present.
| CLASS | |
| I | Presence of flammable gases, liquids or vapors. |
| II | Locations are hazardous because combustible dusts are present. |
| II | Locations contain easily ignitable fibers or flyings. |
Divisions are split into two groups based on the likelihood that ignitable concentrations of flammable materials are present.
| DIVISION | |
| 1. | An environment where ignitable concentrations of flammable gases, liquids, vapors or dusts can exist some of the time or all of the time under normal operating conditions, or where easily ignitable fibers and flyings are manufactured, handled or used. |
| 2. | Locations are where ignitable concentrations are not likely to exist under normal operating conditions or where Class 3 materials are stored or handled. |
Hazardous atmosphere classes are defined by "groups". Combustible materials are grouped by their relevant physical properties, which included (but are not limited to):
| Group | Physical Property Description |
| A | Acetylene |
| B | Hydrogen |
| C | Ethylene, carbon monoxide |
| D | Propane, gasoline, naphtha, benzene, butane, ethyl alcohol, acetone, methane |
| E | Metals including aluminum, magnesium (Div. 1 only) |
| F | Carbonaceous dusts including coal, carbon black, and coke |
| G | Dusts not included in E and F including wood, plastics, flour, starch or grain dusts |
For example, a safety rating for an atmosphere containing combustible grain dust that is normally present in ignitable concentrations would have a safety rating that reads like this: "Class II; Division 1, Group G".
Streamlight flashlights have been tested and certified by the world's leading independent laboratories to ensure the item you choose will be safe, reliable and tough enough for the job. Pioneering flashlight design and technology for over a quarter century, Streamlight products deliver the right tool for many applications.
*This page contains a simplified explanation of safety approvals and lists of some of the substances and conditions for which approval is valid. It is not intended as a substitute for a thorough understanding of the subject. For more information, The National Fire Protection Agency (NFPA), The International Electrotechnical Association (IEC), as well as most certifying agencies offering hazardous locations services are a helpful reference.
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