Oil Pipes - Pressure Loss vs. Oil Flow

Oil pipe pressure drops in pounds per square inch (psi) per 100 ft pipe are indicated in the diagrams below. Oil viscosity is ranging 100 - 600 Saybolt Universal Seconds.

NPS 1/2"

• Inside Diameter 0.622 inches

• 1 gal (US)/min = 6.30888×10^-5 m³/s = 0.227 m³/h = 0.06309 dm³(liter)/s = 2.228×10^-3 ft³/s = 0.1337 ft³/min = 0.8327 Imperial gal (UK)/min
• 1 psi (lb/in²) = 6,894.8 Pa (N/m²) = 6.895×10^-3 N/mm² = 6.895×10^-2 bar = 27.71 in H₂O at 61 ^oF (16.7 ^oC) = 703.1 mm H₂O at 61 ^oF (16.7 ^oC) = 2.0416 in mercury at 61 ^oF (16.7 ^oC) = 51.8 mm mercury at 61 ^oF (16.7 ^oC) = 703.6 kg/m² = 0.06895 atm = 2.307 Ft. H₂O = 16 ounces
• 1 ft (foot) = 0.3048 m

NPS 3/4"

• Inside Diameter 0.824 inches

NPS 1"

• Inside Diameter 1.05 inches

NPS 1 1/2"

• Inside Diameter 1.61 inches

NPS 2"

• Inside Diameter 2.067 inches

NPS 4"

• Inside Diameter 4.026 inches

NPS 6"

• Inside Diameter 6.065 inches

NPS 8"

• Inside Diameter 8.03 inches