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Current Requirement

 Pipe  AST  UST
  Diameter =        Length =     ft.  
Coating Quality =        Current Density =     
UST Head Geometry
Head 1: 
 none   flat   hemisphere 
Head 2: 
 none   flat   hemisphere 
Surface Area  =     sq.ft.
Current Requirement =     Amps.

*  Appropriate unit conversions are performed by the program.
** Coating quality is the percentage of the structure protected by coating.
Formula Used:
Where    
R =  current requirement in amps
S =  surface area in sq.ft.
d =  current density in mA/sq.ft.
q =  coating quality as a decimal