Natural gas, which is essentially methane, needs to be delivered to a redistributing station at a rate of 2.0 kmols/s and a pressure of 170 kpa. the pumping station is situated 160 km away and the pressure at the inlet to the line is 680 kpa. assuming the flow is isothermal at 22 °c and firiction factor is equal to 0.0027, determine the diameter of the pipe required. 1.003 m