Download Pipe and Pipeline Pressure Drop Correlations

Nice collection, thanks.

I did not thoroughly review all equations, here are few comments:

1. 
   Darcy equation for gas is not valid for pressure drop > 10% of P1

1. Type of piping materials not specified; pressure drop varies between carbon steel pipe, aluminum, copper, plastic, fibersbar, etc (I believe all calcs are for new commercial carbon steel pipe)

1. For software improvement, some of the user’s input could be calculated or automated using pull down menues, for example:

1. Compressibility factors are user input

1. Pipe roughness and roughness coefficients are user input

1. Steam density is a user input

     d. C - Empirical constant are user input