
186 Oxygen-Enhanced Combustion
differential pressure, the ratio of the orice plate bore to
pipe inside diameter (beta ratio) and uid density, the
ow rate can be calculated.
The differential pressure depends on the location of
the pressure taps. Pressure taps are located in four gen-
eral arrangements, as illustrated in Figure 9.30: ange
taps, D and D/2 taps, corner taps, and pipe taps. Flange
taps are typically placed on the pipe ange and are
located 1in. upstream and 1in. downstream from the
face of the plate to centerline of the tap. D and D/2 taps
are located one pipe inner diameter upstream and one-
half downstream from the face to the ...