A 6 in. sch 40 pipeline is designed to carry SAE 30 lube oil at 808F (SG ¼ 0:87) at a maximum velocity of 10 ft/s. You must install an orifice meter in the line to measure the oil flow rate. If the...

A 6 in. sch 40 pipeline is designed to carry SAE 30 lube oil at 808F (SG ¼ 0:87) at a maximum velocity of 10 ft/s. You must install an orifice meter in the line to measure the oil flow rate. If the maximum pressure drop to be permitted across the orifice is 40 in. H2O, what size orifice should be used? If a venturi meter is used instead of an orifice, everything else being the same, how large should the throat be?