Home Tab > Scratchpad Panel > Tank Sizing/Cost Scratchpad 
Provides a quick way to both size and price a tank based on the required volume. This
scratchpad is a calculation module that implements the API-650 One-Foot method to
determine the required shell thicknesses. You can alter the specification data and
re-compute the size and cost estimates as many times as necessary. After exiting the
scratchpad, you have the option of transferring the diameter, height, and course thicknesses
to the General Tank Data dialog for subsequent computations by clicking Transfer scratchpad results 
. No other data on the scratchpad is saved.
A minimum amount of user-specified data is required, consisting of the tank volume,
the fluid specific gravity, the plate allowable stress, the unit cost of plate, and
the height and diameter ranges.
After you specify the necessary data, click Scratchpad Calculator 
to initiate the computations. TANK activates this calculator as soon as you define data in the Tank Sizing/Costing Scratchpad Dialog.
The scratchpad computes a total of eight tanks: four for a diameter range, and four for a height range. The results of each range are presented in a list box below the input definition.
For each tank evaluated, the necessary diameter (or height) is presented, as well as the thickness required for each shell course. The height of the top course is also reported, all other courses being equal to the specified input value. The results of the costing are presented last and consist of the shell weight and cost estimate. The shell weight is based on the computed thicknesses and the plate density specified in your configuration settings. The cost is the product of the unit price and the plate weight.
If necessary, the input data can be altered, and new estimates re-calculated as often
as needed. When you get the needed calculation results, you can print a report by
selecting File > Preview/Print. You can also transfer the results for the minimum cost tank to the General Tank Data by selecting Home Tab > Scratchpad Panel > Transfer scratchpad results .
After the scratchpad calculations have been performed, the Dynamic Sizing Tool becomes active. This sizing tool, located to the right of the output display, contains
two slider bars. Moving the slider bars with the mouse changes the corresponding dimension
of the tank, as well as updates the right most column of numerical data in the table.