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...
CLASS6-TOXICSUBSTANCESandINFECTIOUSSUBSTANCES[IATAref.3.6.2;CFRref.173.132]& [IATAref.3.6.6;CFRref.173.134);IMDG2.6]26 CLASS7-RADIOACTIVEMATERIALS[IATAref.3.7.1;CFRref.173.403);IMDG2.7]26 CLASS8-CORROSIVES[IATAref.3.81.;CFRref.173.136);IMDG2.8]26 ...
Class III locations are characterized by the presence of easily ignitable fibers, such as cotton, wool, or other similar materials, in sufficient quantities to create a potential fire hazard. These fibers have the capacity to ignite rapidly and can propagate flames quickly if exposed to an ignitio...
Zones compares to classes and divisions in the North AmericanClass/Division system. Group Group define thetypeof hazardous material and (partly) thelocationof the surrounding atmosphere. Group is divided in three groups where group I is reserved for mining locations. ...
Section 173.4 of the 49 CFR cites criteria that the material and packaging must meet. These include: The small quantity exception covers specific classes and divisions, Class 3 being one of them. The maximum quantity of material per inner receptacle is limited to 30 mL. The inner packaging ...
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...
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...
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...
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. ...
Class III locations are also divided into two divisions. • Class III, Division 1 (CIII,D1): Locations in which easily ignitable fibers or materials producing combustible flyings are handled, manufactured or used. • Class III, Division 2 (CIII...