Hazardous locations are categorized by class, group, and division as follows. Class I: Denotes areas where flammable gas, vapor, or liquid is present. Class II: Denotes areas where combustible dust is present. Class III: Denotes areas where ignitable fibers are present.
What are the classification of hazardous locations?
The National Electric Code classifies hazardous locations in three ways: TYPE, CONDITION, and NATURE. There are three types of hazardous conditions: Class I – gas and vapor, Class II dust, and Class III – fibers and flyings.
Which of the following is listed as a Class 2 hazardous material?
Class 2 dangerous goods are gases. It covers compressed gases, liquefied gases, dissolved gases, refrigerated liquefied gases, mixtures of gases and aerosol dispensers/articles containing gas. There are 3 sub-divisions: Division 2.1: Flammable gases.
What is the difference between Class 1 Div 1 and Div 2?
Class 1 Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.
What are the different types of Hazard Class 2?
There are three broad sub-categories of Hazard Class 2 that specify which type of hazard a gas presents. They are as follows: Division 2.1: Flammable Gases. These gases are known to ignite on contact with ignition sources. This includes acetylene, hydrogen, propane and many others.
What makes a gas a hazard Division 2?
Division 2.1: Flammable Gases. These gases are known to ignite on contact with ignition sources. This includes acetylene, hydrogen, propane and many others. Division 2.2: Non-Flammable, Non-Toxic Gases.
Do you need a hazard class 2 placard?
All Class 2 hazardous materials need proper hazard class placards identifying them as such. Employees who work with Class 2 hazardous materials need to have the correct training certifying them for their job function or be directly supervised by someone with the proper training/certification.
What are the rules for shipping hazard class 2 materials?
Basic Shipping Requirements for Hazard Class 2 Shipments of Hazard Class 2 materials may be bound by a variety of specific regulations, but the baseline rules include: Toxic gasses in Class 2.3 generally cannot be mailed in the U.S. and must be transported by DOT-certified hazmat carriers.
