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Understanding the factors that affect the selection of a gauging technology based on the petroleum product stored in a tank

Tank Gauging Solutions for Liquid Petroleum Products

Varec is able to recommend a tank gauging solution based on the technology and petroleum product stored in a tank. Stock or refined petroleum products may be grouped into categories based on the physical properties that affect instrumentation or the measurement in the tank.

The following are general tank gauging solution recommendations based on common product applications. Each solution details level and temperature measurement options to allow for volume calculations to applicable API standards based on the accuracy of the level device. The final selection of a technology would also depend on the applicable operations and installation requirements as well as customer preference.

Liquid Gases

Varec recommends a servo technology solution for storage tanks containing liquefied gases, such as LPG, methane, ethane and butane, due to the accuracy and multi-variable measurement of the 6005 STG. The other major technologies radar, hybrid, float & tape and hydrostatic (in order of preference) are also suitable for measurement of liquefied gases.

Light Distillates

Varec recommends a servo technology solution for storage tanks containing light distillates, such as gasoline (petrol), kerosene, jet fuel and other aircraft fuels, due to the accuracy and multi-variable measurement of the 6005 STG. The other major technologies - radar, hybrid, float & tape and hydrostatic (in order of preference), are also suitable for measurement of light distillates.

Middle Distillates

Varec equally recommends a servo technology solution or a radar technology solution for storage tanks containing middle distillates, such as automotive/railroad diesels, residential and other light heating/fuel oils. Both technologies provide measurable benefits, depending on your business operations. The other major technologies - hybrid, float & tape and hydrostatic (in order of preference), are also suitable for measurement of middle distillates.

Viscous Products

Varec recommends a radar (non-contact) technology solution for storage tanks containing viscous products, such as crude, heavy fuel , bunker fuel and other residual fuel oils if a level only measurement is required. If multiple variables are required for inventory management, such as density or water interface, then a servo technology solution is recommended. The other major technologies - hybrid, float & tape and hydrostatic (in order of preference), are also suitable for measurement of middle distillates.

For extremely viscous products, such as asphalt and tar, Varec recommends a non-contact measurement solution, such as radar technology or hydrostatic measurement with heat traced nozzles.

Aggressive Products

Varec recommends a radar (non-contact) technology solution for storage tanks containing aggressive products, such as elemental sulfur or sulfuric acid. Alternatively, servo or float & tape technology solutions with specific material selections (hastalloy C, carp 20 or PTFE) for wetted parts may also be suitable.