hazardous areas are separated by classes, divisions, and groups to define the level of safety required for equipment installed in these locations. Classes define the general form of the flammable materials in the atmosphere. Divisions define the probability of the presence of flammable materials. Grou...
Groups A, B, C, and D are for gases (Class I only). Groups E, F, and G are for dusts and flyings (Class II or III). The specific hazardous materials within each group and their automatic ignition temperatures can be found in Article 500 of the National Electrical Code and in NFPA...
Approved equipment is marked according rated Class (I, II, or III), Division (1 or 2), Group (A, B, C, D, E, F, or G) and temperature code (T1 through T6). For intrinsically safe equipment the words “Intrinsically Safe” or “IS” precedes the actual approval marking. Example -...
In North America, hazardous areas are separated by classes, divisions, and groups to define the level of safety required for equipment installed in these locations. Classes define the general form of the flammable materials in the atmosphere. Divisions define the probability of the presence of ...
Divisions Hazardous areas don’t always maintain a constant level of risk. In these circumstances, rather than evaluating these areas along a spectrum or constantly reevaluating at-risk areas, facilities classify them by their likelihood of having hazardous materials. ...
materials. The Classes are separated based on the type of hazard and the explosive characteristics of the material. The Divisions are based on the occurrence or risk of fire or explosion that the material presents. The Classes or type of material is further separated into Divisions based on the...
SHIPPINGHAZARDOUSMATERIALS ATrainingCoursein49CFR Updated6/2002 CourseObjectives ProvidesareviewofU.S.DOTHazardousMaterialsRegulationsFormspartofrecurrenttrainingasrequiredby49CFR HazardousMaterialsRegulations Hazardousmaterialsareregulatedinorderto:–Preventaccidents,leaksandspills–Helpemergencyresponders–Ensure...
The 49 CFR addresses key protocols for preparing, shipping, and handling dangerous goods.Any person handling dangerous goods should read, understand, and comply with all elements of the 49 CFR. Some of the highlights include: The description of hazardous materials by class, including explosives, ga...
Classes and Divisions for Hazardous Area Lighting Hazardous area lighting is categorized into different classes and divisions based on the level of risk and the type of hazardous material present. The primary classifications are: Class I: Areas where flammable gases or vapors are present in the air...
a Class and Division system has been adopted for hazardous locations. Hazardous locations are divided into three Classes with each Class subdivided into two Divisions. The Classes are based on the type of hazard potential and the explosive nature of the materials, while Divisions are based on the...