There are a few computer tools designed specifically for modeling and analysis of complex multiphase systems such as PipePhase, PipeSim, OLGA, and etc. In the June Tip of the Month (TOTM), we illustrated how the process simulation programs can be used to simulate a natural gas transmission pipeline. These programs are based on mechanistic models and laboratory developed correlations and rely on complex iterative algorithms to perform the tedious calculations. However, for hand calculation, the Flanigan correlation (which is based on the field data for gas dominated transmission pipelines) has been developed and can be used in relatively straight manual calculations.

In this TOTM (which is a continuation of the June TOTM), we will demonstrate the accuracy and application of the Flanigan correlation. Three methods used in this analysis include the basic gas flow equation, the Flanigan correlation, and the computer models using the Beggs-Brill correlation with the original liquid hold up correlation. To learn more about this Tip and past Tips of the Month, visit Campbell Tip of the Month.