American National Standards Institute (ANSI) reviews safety standards, include Hazardous Locations, every 5 years. In July 2012, UL 1604
— Electrical Equipment for Use in Class I and II, Division 2 Hazardous Locations — was withdrawn as the approved ANSI standard for use in the United States. UL1604 was replaced with ISA 12.12.01-2000 which has very similar requirements as UL1604 Hazardous Locations Class 1 Division 2.
ANSI 12.12.01-2000 Hazardous Locations certification allows products to be used in potentially explosive environments found in oil and gas, petrochemical, aviation and other industries. Select fully-rugged Toughbook®
mobile computers can be configured to provide safe, reliable solutions for spark-free use. ANSI 12.12.01-2000 Hazardous Location approved models are available for use in Class I, Division 2, Groups A, B, C and D environments. These are defined as places where flammable gases, vapors and liquids are present during abnormal or accident conditions. DOWNLOAD ANSI 12.12 REPORT