USA Phone: 612.721.4473

Propane Storage Tanks

Most Propane storage tanks in standby-plant service are steel, non-refrigerated pressure vessels. Aboveground and underground storage options are available in a variety of sizes. New vessels are constructed in conformance with all current requirements of ASME Section VIII, Division 1 and designed for at least 250 psig working pressure.

Common tank sizes and approximate dimensions are shown in the chart below. Larger industrial and commercial applications generally use 18,000 gallon and larger tanks.

Tank Trim

Required tank trim includes relief valves, excess flow valves and gauges for temperature, pressure and liquid level. Remote / automatic valve features are often required or desired to provide enhanced product control and safety.

See also: Hazard Detection Systems

Fire Protection

At some locations, "special protection" for tanks (such as mounding, burial, insulating coatings or water-spray systems) may be required or desired to reduce the already small potential for fire-induced tank failures.

Propane Storage Tanks
Relating Natural Gas and Propane Storage

To allow for expansion of the liquid propane, tanks are never filled to 100%. At 60° F, the maximum filling density is about 85%. The chart and graph below show common tank sizes and net fuel storage capacities in gallons and "millions of Btus" (MMBtu) (1 MMbtu = 1 Dekatherm.) .

4-storage capacity (52K)

Tank Trim Options

Standard Package
  • Internal Combination Excess Flow Shutoff Valves
  • Manual, Fire-Rated Isolation Valves
  • Relief Valves
  • Pressure, Temperature, and Level Indicators
Enhanced Control Package
  • Standard Package plus:
  • Pressure, Temperature, and Level Transmitters
  • Remote / automatic safety valves are standard storage tank trim on SSi systems.
  • Note: To purchase the Enhanced Package you must also purchase the Enhanced Control Option, which includes a Programmable Logic Controller (PLC) necessary to read the transmitters.
Optional Items
  • Multiport valves
  • Actuated, fire-rated, back-up isolation valves