tanks [3]
Large covered cylindrical containers that are usually made of steel; liquid or gaseous oil products are stored here between the time they are refined and sold.
floating-roof tank 
Tank whose floating roof rests directly on the surface of the liquid to minimize the evaporation of hydrocarbons; it is used to store the most volatile products.
stairs 
Structural element giving access to the roof of the tank.
ground 
Wire that connects the tank and its contents to the ground to prevent static electricity from accumulating and avoid the risk of fire.
drain valve 
Device for emptying the liquid from the tank.
filling inlet 
Operation by which a liquid product is introduced into the tank.
thermometer 
Device that sets and controls the temperature of the product inside the tank.
shell 
Vertical cylindrical wall of the tank.
floating roof 
Metal cover that rests on the surface of the stored liquid; it fluctuates with the level of the fluid and slides vertically inside the shell.
manhole 
Round opening in the tank that is covered with a plate; workers can pass through it.