Add friction from system flow resistance to "A.H." figure Also known as "Viscous drag", "Scrubbing action", "Rotary flow", "Reynolds effect"

Pipe Fitting Component Fittings
Round the corner of a Tee T1 = 1
Past a side opening of a Tee T2 = 3
Back into line from a side opening in a Tee T3 = 1
Rounded corner 90° elbow (Long Rad. or L.R.90) E1 = 2
Abrupt 90° elbow ("hard" 90 or Machined "L") E2 = 9
Gentle 45° elbow (Bends & or "5D" 90) E3 = 2

Effective Length of Pipe System

Leff = L + (0.0667 x D x T1) + (0.0209 x D x T2) + (0.0667 x D x T3) + (0.0327 x D x E1) + (0.0681 x D x E2) + (0.0144 x D x E3) - Figures applied for E and T are averages from tests

2. CALCULATIONS
2.1 Velocity V of the flow in the pipe:

2.2. Reynolds Number:

2.3 Friction Factor: (cold drawn pipe)

2.4. Pressure loss:

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