Tanks on IndustryNet

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Tanks are general storage containers and have many configurations, depending upon dimensional orientation, placement and shell configuration.

Important –when considering specification for tanks, the most important parameters are capacity and dimensions.

Capacity of a tank is the internal volume available for the storage materials.Diameter of the tank is typically expressed in meters.

Configuration:

• Typically placed above ground or underground and is dependent on the actual requirements

• The wall construction of the tank dictates its suitability for a particular application

• Single shell storage tanks are common for various applications

• Double shells storage tanks are used in applications where low temperature storage or higher pressure consideration are necessary

• Orientation can be vertical or horizontal

Types of Materials Used:

• Galvanized steel

• Stainless steel

• Nickel steel

• Steel

Manufacturing Process:

1. Foundation is prepared

2. Base plate is laid out and welded

3. Periphery of the tank is marked out on the plate

4. Guide trestles for the shell plates are erected

5. Top shell plates are also erected and welded vertically

6. Roof trestles are assembled and joined to the top shell plate

7. Lifting trestles with hydraulic jacks are fitted internally along the periphery of the tank

8. Lifting lugs and guides are welded to the small plate

9. Top shell plate along with the roof construction are lifed one plate height

10. Roof plate is fitted and welded in place

11. Lifting lugs/guides are removed from top shell plate and new lugs/guides are welded to the next shell plate. hydraulic jacks are lowered to original lifting positions

12. The tank is then lifted again to allow further erection of shell plates

13. Upon completion of the construction of the tank, the tank is lifted slightly and trestles are dismantled

14. The tank is lowered and both shell and base plates are welded together

15. Jacking equipment is removed

The failure of a tank can have several undesirable effects:

• Endangering of people

• Affecting the environment

• Interrupting business at times


Manufacturing companies are required to have consistent approach for assessing tank integrity and maintaining compliance with industry and regulatory standards.

Purchasing Tips:

• Mechanical drawing is important – request a copy from the supplier/manufacturer, if they are unable to provide one then go to another supplier

• Material thickness is important as replacing or installing a tank is not easy and is not a job someone would like to do often. Material thickness plays a big part in durability

• Specification on the coating – ask supplier/manufacturer what type of coating is used to protect the tank from the elements

• Weld type is an important factor to also consider as this affects the life of the tank, Much of the vibration and stress are transferred to the welds

• Choices should be available, such as: locking fuel caps, fuel heaters, visual gauges

• Shipping information is also important. Request a copy of the shipping and tracking number so the delivery process can be tracked.

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