The flow rate in a 1.5 in. line can vary from 100 to 1000 bbl/day, so you must install an orifice meter to measure it. If you use a DP cell with a range of 10 in. H2O to measure the pressure drop...

The flow rate in a 1.5 in. line can vary from 100 to 1000 bbl/day, so you must install an orifice meter to measure it. If you use a DP cell with a range of 10 in. H2O to measure the pressure drop across the orifice, what size orifice should you use? After this orifice is installed, you find that the DP cell reads 0.5 in. H2O. What is the flow rate in bbl/day? The fluid is an oil with an SG = 0:89 and  = 1 cP.