A propane tank or liquefied petroleum gas (LPG) tank is a type of gas cylinder designed to carry propane or butane fuel gases. For tagging purposes this tag should be used for the transportable propane cylinders (example) larger than portable stove fuel canisters (example), but smaller than the large fixed pill-shaped tanks installed outside a home or business (example). This specific type of propane tank is predominately used to fuel outdoor grills and stoves, outdoor heating units, food truck and concession stand stoves, and small home heating units.
These types of propane tanks are identifiable by the presence of a metal protective collar or neck ring around the valve at the top of the canister. This protects the valve from damage. At the bottom of the tank will be a metal foot ring, which serves to keep the tank standing without rolling and keeps the tank from directly contacting the ground. Propane tanks are also typically white or silver in color; while not mandatory, it is common as it is used to help reflect sunlight and keep tanks from dangerously heating up.