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tanks
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.
bottom deck
Lower part of the roof; it rests directly on the surface of the stored liquid.
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.
ladder
Movable device that consists of rungs (crossbars); it is used to climb up and down.
top deck
Upper part of the roof; the space between the top and bottom decks is used to contain evaporated hydrocarbons.
sealing ring
Part that fills the space between the roof and the shell to prevent any hydrocarbons from evaporating and polluting the atmosphere.
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.
