For the purpose of this subpart, the terms listed below shall be construed to have the following meanings:

1. (1) “Approved”means:

   1. (A) Tested and listed by a recognized testing laboratory; or
   2. (B) Inspected and approved by the Boiler Inspection Division;
2. (2) “Appurtenances” means all devices such as safety devices, liquid level gauge devices, valves, pressure gauges, fittings, and metering or dispensing devices;
3. (3) “Capacity” means the total volume of the container measured in standard United States gallons, unless otherwise specified;
4. (4) “The code” or the “ASME code” means the Unfired Pressure Vessel Code of the American Society of Mechanical Engineers, Section VIII, Division 1 of the ASME code, as adopted;
5. (5) “Design working pressure” is identical to the term “maximum allowable working pressure”, used in the code;
6. (6) “Filling density” means the percent ratio of the weight of the gas in a container to the weight of water the container will hold at sixty degrees Fahrenheit (60° F);
7. (7) “Gas” means anhydrous ammonia in either the gaseous or liquefied state;
8. (8) “Liquid fertilizer” means anhydrous ammonia or any ammonia solution generating a vapor pressure of twenty-five pounds per square inch gauge (25 psig), and over, at seventy degrees Fahrenheit (70° F);

9. (9) “Systems” means an assembly of equipment consisting essentially of the:

   1. (A) Container or containers;
   2. (B) Appurtenances;
   3. (C) Pumps;
   4. (D) Compressors; and
   5. (E) Interconnecting hose and piping; and
10. (10) “Tank”, “container”, or “vessel” means vessels designed and constructed for the storage, transportation, and utilization of anhydrous ammonia.