Example 8.5. An orifice meter equipped with flange taps is to be installed to measure the flow rate of topped crude to a cracking unit. The oil is flowing at 100F (37.8C) through a 4-in. (100-mm) Schedule 40 pipe. An adequate run of straight horizontal pipe is available for the installation. The expected maximum flow rate is 12,000 bbl/d (1 bbl = 42 U.S. gal) (79.5 m/h), measured at 60F (15.6C). Mercury is to be used as a manometer fluid, and glycol (specific gravity 1.11) is to be used in the leads as sealing liquid. The maximum reading of the meter is to be 30 in. (762 mm). The viscosity of the oil at 100F (37.8C) is 5.45 cP. The specific gravity (60F/60F) of the oil is 0.8927. The ratio of the density of the oil at 100F (37.8C) to that at 60F (15.6"C) is 0.984. Calculate (a) the dinmeter of the orifice and (b) the power loss