Single-Wall ASME Calculator

Results from the “Single-Wall ASME Calculator” represent approximate performance using the input variables and constants given. The output results may vary from actual performance and are intended to provide guidance for the application and sizing process only.

Special Note: In no event shall Niles Steel Tank, its suppliers or any third parties mentioned on the Website be liable for any damages whatsoever (including, without limitation, incidental and consequential damages, lost profits, or damage resulting from business interruption) resulting from the use or inability to use of the “Single-Wall ASME Calculator”, whether based on warranty, contract, tort or any other legal theory, and whether or not Niles Steel Tank is advised of the possibility of such damages.

In other words, the legal terminology above is saying, “Use at your own risk”. The solar calculator is a basic tool to confirm your choice on number of coils and tank size. It is not intended to guide you on what to use, but it will tell you “If” you choose “X”, your outcome will be “Y”.

To use the calculator, you need the following information:

  • Number of internal coils (call our office for guidance if needed)
  • Incoming make-up water temperature (from the street)
  • Target temperature of heated water (typically 140 to 180 degrees F)
  • Tank size
  • Water temperature (solar panel loop)
  • Solar pump rates (GPM)

Once you have that information you can calculate your design. The key is to adjust the Delta T and solar loop temperature numbers (line 35 & 36) so that the pump rate (line 47) matches your actual pump. This will give you a continuous draw and first hour return of what you can expect with the given parameters.


Single-Wall ASME Calculator