ΔP = 47.8 kPa (≈ 4.9 m head loss) Velocity = 1.77 m/s Re = 176,000 (turbulent) f = 0.019 Fitting loss = 8.2 kPa, friction loss = 33.6 kPa, static = +6.0 kPa.
If your flow meter reads at actual line conditions, you must convert to SCF. A 100 ACFM flow at 100 PSIG is actually ~700 SCFM. If you enter 100 SCFM, your pressure drop will be 7x too low. sf pressure drop online-calculator