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# Pressfit Pipes - Pressure Loss vs. Water Flow Diagram

The diagram below indicates friction loss for water flow through Schedule 5 Carbon Steel Pipe or Type 304/304L and Type 316/316L Stainless steel pipe.

The pressure drop calculations are made with the D'Arcy-Weisbach Equation.

### 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

• 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

A table presentation of the diagram above can be found in "Friction Loss Pressfit Pipes".

## Related Topics

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### Pressfit Piping - Dimensions

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### Pressfit Piping - Friction Loss vs. Water Flow

Water flow friction loss in pressfit piping.

### Steel Pipes Schedule 40 - Pressure Loss

Water flow and pressure loss in schedule 40 steel pipes - Imperial and SI units - gallons per minute, liters per second and cubic meters per hour.

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