Historical
ANSI/ISA TR12.13.01-1999
Flammability Chracteristics of Combustible Gases and Vapors
To formulate standards, recommended practices, and technical reports for safe and practical use of electrical equipment in hazardous (classified) locations, and standards for equipment used to detect, alarm, or process signals relating to the detection of materials within their combustible ranges; and to promote their use.
The International Society of Automation [isa]
