Metering: 2005 #60 (similar)

Gas metering? Lots of word problem potential.
Guidebook notes on metering are on 8 FAC 3-4:

1) Flange taps are 1" on either side of the plate.
2) Pipe taps location to plate: 2.5 and 8 pipe diameters upstream & downstream
3) 27.67 inches of H20 is 1 psi
4) Gas orifice plates are installed with beveled edge upstream downstream.