Problem 3.10 A petroleum product of viscosity 0.5 mNs/m² and specific gravity 0.7 is pumped through a pipe of 0.15 m diameter to storage tanks situated 100 m away. The pressure drop along the pipe is 70 kN/m². The pipeline has to be repaired and it is necessary to pump the liquid by an alternative route consisting of 70 m of 200 mm pipe followed by 50 m of 100 mm pipe. If the existing pump is capable of developing a pressure of 300 kN/m², will it be suitable for use during the period required for the repairs? Take the roughness of the pipe surface as 0.005 mm. Original piping: NR. 8.8 x 105 and velocity = 4.19 m/s. Volumetric flowrate = 0.074 m³/s. For the same flowrate: The velocity in the 0.2 m diameter pipe = 2.36 m/s. The velocity in the 0.1 m diameter pipe = 9.44 m/s.