Crude oil flows through a level section of the Alaskan pipeline at a rate of 1.6 million barrels per day (1 barrel = 42 gallons). The pipe inside diameter is 120 cm, and its roughness has a characteristic dimension of 1.5 mm. The maximum allowable pressure is 8300 kPa, and the minimum pressure required to keep dissolved gases in solution in the crude oil is 350 kPa. The crude oil has SG = 0.93, and its viscosity at the pumping temperature is μ = 0.017 Ns/m2. For these conditions, determine the maximum possible spacing between pumping stations.