In this article, unless the context otherwise requires:

1. "Authorized representative" means the boiler chief and boiler inspector employed by the division.

2. "Boiler" means a closed vessel in which water or other liquid is heated, steam or vapor is generated or steam or vapor is superheated, or any combination thereof, under pressure or vacuum for a use that is external to itself, by the direct application of heat from the combustion of fuels or from electricity.

3. "Certificate" means a certificate of competency.

4. "Certificate inspection" means an internal inspection, when construction permits, otherwise it means as complete an inspection as possible.

5. "Commission" means the industrial commission of Arizona.

6. "Director" means the director of the division of occupational safety and health.

7. "Division" means the division of occupational safety and health of the commission.

8. "Heating boilers" means a steam or vapor boiler operating at a pressure not exceeding fifteen pounds per square inch or a hot water boiler operating at a pressure not exceeding one hundred sixty pounds per square inch or a temperature not exceeding two hundred fifty degrees Fahrenheit.

9. "High temperature water boiler" means a water boiler intended for operation at pressures in excess of one hundred sixty pounds per square inch or temperatures in excess of two hundred fifty degrees Fahrenheit.

10. "Interested party" means the commission, agents of the commission and any owner or operator who has been issued a notice of violation.

11. "Lined hot water heater" means a fired lined water heater with linings providing corrosion resistance for supplying potable hot water for commercial purposes. Lined hot water heaters are exempted when none of the following limitations are exceeded:

(a) Heat input of two hundred thousand British thermal units per hour.

(b) Water temperature of two hundred ten degrees Fahrenheit.

(c) Nominal water-containing capacity of one hundred twenty gallons.

12. "Owner" or "operator" means any individual or type of organization, including this state and all political subdivisions of this state, that has title to or controls, or has the duty to control, the operation of one or more boilers, pressure vessels or lined hot water heaters.

13. "Power boiler" means a boiler in which steam or other vapor is generated at a pressure more than fifteen pounds per square inch.

14. "Pressure vessel" means a container for the containment of pressure, either internal or external. The pressure may be obtained from an external source, or by the application of heat from a direct or indirect source, or any combination thereof.

15. "Process boiler" means a heating boiler or a power boiler used for processing purposes where the make-up water exceeds ten percent.