Crude oil tanks
The quality and aggressive nature of the crude oil typically stored in these tanks can vary greatly. Depending on the viscosity of the crude oil, heating may be required to keep the feed stock liquid. This is achieved through heating coils in the bottom of the tank, water will separate out and collect at the bottom of the tank around the heating coils. This will create a hot and acidic environment which potentially can stress the tank lining. Additionally this type of environment gives suitable conditions for growth of SRB.
Typically containing petroleum products such as diesel, jet fuel, gasoline, solvents or crude palm oil. Some chemicals - like jet-A fuel - require certified tank linings. Storing this type of chemicals in a tank with a lining that is not certified means the chemical will not be qualified for this usage, impacting the profitability.
Typically the most challenging and valuable chemicals are stored here. Typically these tanks contain process critical additives, high value end products, acids or other corrosive and hazardous chemicals. Any lining that will be in contact with foodstuffs needs to have the correct approvals to ensure the stored product can be used for its intended purpose. Examples include palm oil, grains and potable water.