Terms of Underwriters Laboratories (UL) standards. Safe products are rated UL Class I, Division 1 and Groups C and D; Class II, Division 1 and Groups E, F and G; and temperature code T3. Class – Class I includes environments of flammable gases, vapors, or liquids. Class II includes combustible dust.   Division 1 – This is the most stringent division of either class. It covers situations where ignitable concentrations of flammable gases, vapor, or liquids.   (Class I) and combustible dust (Class II) can exist all of the time or some of the time under normal operating conditions.   Groups – This specifies the type of flammable substance in the hazardous environment. We are qualified in five groups: C (ethylene), D (propane), E (metals), F (coal), and G (grains).   T3 – This is a temperature code and rates the equipment for environments of less than 200 degrees C.   We are dedicated to providing serious solutions to serious businesses. We help you get it right the first time. End-to-end solutions for unmatched availability to electronic resources development and application engineering services to a broad mix of institutional, governmental, and corporate clients. Here are the tools that will improve the way your company deals with clients and other businesses process.