Steel Pipes Schedule 80 - Friction Loss vs. Water Flow Diagram
Water flow in steel pipes schedule 80 - pressure drop and velocity diagrams in SI and Imperial units.
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The diagrams below indicates pressure drop for water flow through ASME/ANSI B36.10/19 schedule 80 steel pipes.
The pressure drop calculations are made with the D'Arcy-Weisbach Equation.
- Fluid : Water
- Pipe : Steel Pipe - Schedule 80
- Temperature : 20.0 oC (68.0 oF)
- Density : 998.3 kg/m3 (62.0 lb/ft3)
- Kinematic Viscosity : 1.004 10-6 m2/s (0.01 stokes) (1.08E-5 ft2/s)
- Pipe Roughness Coefficient : 4.5 10-5
Pressure Drop - SI units
- 1 Pa = 10-6 N/mm2 = 10-5 bar = 0.1020 kp/m2 = 1.02x10-4 m H2O = 9.869x10-6 atm = 1.45x10-4 psi (lbf/in2)
- 1 liter/s = 10-3 m3/s = 3.6 m3/h = 0.03532 ft3/s = 2.1189 ft3/min (cfm) = 13.200 Imp.gal (UK)/min = 15.852 gal (US)/min = 792 Imp. gal (UK)/h
- 1 m/s = 3.6 km/h = 196.85 ft/min = 2.237 mph
Pressure Drop - Imperial Units
Friction Loss Table
Friction loss table in pdf-format.
- 1 gal (US)/min =6.30888x10-5 m3/s = 0.0227 m3/h = 0.06309 dm3(litre)/s = 2.228x10-3 ft3/s = 0.1337 ft3/min
- 1 ft/s = 0.3048 m/s
- 1 psi (lb/in2) = 6,894.8 Pa (N/m2) = 6.895x10-3 N/mm2 = 6.895x10-2 bar = 27.71 in H2O at 62oF (16.7oC) = 703.1 mm H2O at 62oF (16.7oC) = 2.0416 in mercury at 62oF (16.7oC) = 51.8 mm mercury at 62oF (16.7oC) = 703.6 kg/m2 = 2.307 Ft. H2O
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