Rules by director definitions

1. The director is hereby empowered and directed to formulate and adopt and from time to time amend or revise and to promulgate, in conformity with and subject to the conditions set forth in this chapter, reasonable rules for the safe transportation, storage, handling, and use of combustible liquids, flammable liquids, liquefied petroleum gases, and liquefied natural gases. 2. For purposes of this chapter: a. “Combustible liquid” means any liquid that has a closed-cup flash point greater than or equal to 100 degrees Fahrenheit. b. “Director” means the director of the department of inspections, appeals, and licensing or the director’s designee. c. “Flammable liquid” means a liquid with a closed-cup flash point below 100 degrees Fahrenheit and a Reid vapor pressure not exceeding forty p.s.i. absolute, 2026.6 mm Hg, at 100 degrees Fahrenheit. d. “Liquefied petroleum gas” means material composed predominantly of any of the following hydrocarbons, or mixtures of the same:Propane, propylene, butanes (normal butane or isobutane) and butylenes. e. “Liquefied natural gas” means a fuel in the liquid state composed predominantly of methane and which may contain minor quantities of ethane, propane, nitrogen, or other components normally found in natural gas. f. “Petroleum” means petroleum as defined in section 455B.471.