The output of this calculator is the pressure drop per unit length given in bar/km. This output figure must be multiplied by the equivalent length of the pipe to calculate the total pressure drop across length of the pipe. The total equivalent length of the pipe is obtained by adding the equivalent lengths of all the fittings to the straight pipe length.
FOR TWO PHASE FLOW
For two phase flow the calculator given below calculates the pressure drop per unit length of the pipe based on the Lockhart-Martinelli Method. For prediction of the two phase flow regime various methods can be used.
This calculator gives value of pressure drop per unit length of a straight line. But usually pipes are accompanied by bends, fittings, valves etc. Use EnggCyclopedia’s K-factor calculator to obtain pressure drop across fittings in a line.
For a single phase flow case through a pipe, use EnggCyclopedia’s single phase pressure drop calculator.