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A rectangular steel tank is shown in Fig. The steel tanks are used for storage and supply of water and other liquids, like petroleum, diesel, and kerosene oil. The steel circulag are designed conforming to code of practice for use of steel in gravity water tanks IS: For the hemispherical bottom tanks, the theoretical drop of the bottom from spring line is one half the diameter of the ,tank.
These plates and the tee sections are provided in the inner-side to cover to form a butt-joint with circular water tank design example filetype pdf download side plates of the tanks.
Design of Steel Tanks
The hemispherical, segmental or elliptical bottoms are commonly used. For small tanks, with hemispherical bottom, the ratio of height of cylindrical shell to the diameter is approximately I: The plates are sheared or planed to a suitable bevel along the edges by caulking. These plates are turned up at the ends.
The widths of desigb plates generally adopted are examplr. When the steel tanks are placed on the towers or staging, then, the steel tanks are known circular water tank design example filetype pdf download elevated steel tanks.
The nominal plate pf as recommended in IS: The thickness of the plates in the cylindrical shell should not be less than 6 mm. For the elliptical bottom tanks, this drop is one-fourth the diameter, The steel plates used for the sides of the cylindrical shell are kept slightly different in diameters, so that the courses are placed overlapping each other inside and outside, alternately.
Circular Steel Tank design calculation
Design of Steel Tanks. I for tanks of 6,75, litres capacity and more. The steel tanks are either placed on ground or placed on circulxr.
The rectangular steel tanks are made of steel plates with flat bottom. These steel tanks with vertical cylindrical surface and flat bottom and supported on ground are known as surface tanks.
Design of Steel Tanks
In case, the tank water contains salts, the thickness of steel. The shell plates are shaped to suit the curvature of the tank.
The minimum thickness of plates in the suspended bottom should not be less than the thickness of plates in the lowest course of the cylindrical part of the tank. The dkwnload steel tanks are made with hemispherical, segmental and conical bottoms.
The conical bottom tanks are used in railways. The pressed steel tanks have come into use to large extent because of their ease in the erection, facility in transport, standard construction, ease in dismantling and re-erection. The bottom plates are provided in the transverse direction. The permissible stresses as given in IS are considered basic stresses.
An elevated circular steel tank is shown in Fig. When the steel tanks are placed on ground, then, these are supported on cement concrete foundation or on steel grillage foundation. It is difficult to make-a satisfactory connection of conical bottom with the circular girder. The conical bottom is. Exmple steel tanks are defined as vessels made of steel plates. The elevated circular steel tanks are made with suspended bottoms.
The minimum thickness of the steel exapmle of the tanks shall be 6 mm except for roofs.