Storage tanks are general storage containers, they can have many configurations depending upon dimensions, orientations, placement, and shell configuration.

Materials of construction will dictate the application that is suitable for the tank. Storage tanks are used in a number of applications for general storage of materials.

The most important parameters to consider when specifying storage tanks are their capacity and dimensions. The capacity of the storage tank is the internal volume available for the storage of materials. The diameter of the tank is typically expressed in meters.

With All Time's technology in automatic welding systems and experience in site storage tank welding, we provide you with true time saving methods for field constructions of various storage tanks.

Tank Configuration

The placement of storage tanks is typically either above ground or underground, depending on the actual requirements. The wall construction of the storage tank usually dictates its suitability for a particular application. Single shell storage tanks are common for various applications. Double shell storage tanks are used in applications where low temperature storage or higher-pressure considerations are necessary.

The orientation of the storage tank can be vertical or horizontal.  

Materials

Materials for storage tank construction include galvanized steel, stainless steel, Nickel steel and steel.

• Steel is a ferrous-based metal having a variety of physical properties depending on composition. Steel used in storage tank applications is typically rolled steel plate.
• Stainless Steel is a type of metal that resists corrosion.
• Nickel Steel is used for tanks designed to obtain sufficient ductility and structural integrity at extreme subzero temperatures (eg. -196ºC).
• Galvanized Steel is cold rolled steel that has been surface treated with a layer of zinc.
• Industries and applications that use storage tanks include chemical processing, food and beverage processing, oil and fuel processing, paper and pulp processing, pharmaceutical processing, plastic processing and water applications.

Cryogenic Tanks

Related Information

Liquefied Natural Gas(LNG)        Storage Tank

Double shell 9% Ni LNG Tank

Double shell 5% Ni LPG Tank

There has been increasing demand worldwide for the use of liquefied gasses due to the unstable oil prices and environmental concerns. Liquefying a gas can achieve a 600 fold reduction in volume, which makes it more economical to handle and store.

Liquefied Natural Gas

(LNG) can be obtained by cooling Methane gas down to –163ºC.

At extremely low temperatures, standard ferrite structural steels are no longer suitable. They lack impact toughness and are at risk of brittle fracture. To handle this extreme, Cryogenic Nickel Steels have been developed for building storage tanks that offer reliable properties down to –196ºC.

Most cryogenic tanks such as LNG storage tanks are being constructed according to the "Double Integrity Concept", which means the tank consists of a cryogenic steel inner shell and a concrete outer shell, with heavy insulation in the middle.

1st stage:
Tank bottom is assembled on the prefabricated foundation from separate steel plates, which are to be welded to each other.                                                 

2nd Stage:
Tank course is assembled of steel plates up to 3m wide by vertical welding.

2nd Stage:
The system of hydraulic lifting jacks forming a conductor is set up around the whole perimeter;