c

a) State and sketch the six different flow regimes that can be found in 2-phase horizontal flow. [12 Marks] b) State and explain three reasons why water contained in natural gas is considered an undesirable impurity? [6 Marks] c) Natural gas is being transported over land a distance of 32 miles with an inclination of 2145ft at a flow rate of 563 MMSCF/D through a 32 inch pipeline. Using the data provided, calculate the inlet pressure required for the gas to arrive at a pressure of 600 psia. [7 Marks] zfMsP12=cos(180)L=di0.1640.01603=Z(T+460)0.0375gLcos=exp(s)P22+di5cos6.67104[exp(s)1]fMQSc2Z2(T+460)2 [Total 25 marks]