Tanks are containers that hold liquids, compressed gases (gas tank; or in “pressure vessel”, which is not typically labeled or regulated as a storage tank) or mediums used for the short- or long-term storage of heat or cold.

A storage tank is a large vessel for storing oil, gas, and other petrochemical products.

Basically there are eight types of tanks used to store liquids:

  1. Fixed-roof tanks.
  2. External floating roof tanks.
  3. Internal floating roof tanks.
  4. Domed external floating roof tanks.
  5. Horizontal tanks.
  6. Pressure tanks.
  7. Variable vapor space tanks.
  8. LNG (Liquefied Natural Gas) tanks.

There are two main types of fuel storage tanks – Above ground tanks and Underground tanks.