Question

A 6.8-km cast-iron
(new, uncoated) pipeline conveys 285 L/s of water at
10^{o}C. If the pipe diameter is 32 cm, determine the
friction head loss (in m) calculated using the Hazen-Williams
equation. Use typical values for pipe roughness, as needed.

Ch = 130 for new , uncoated pipeline

Select one:

a. 99.53

b. 552.8

c. 225.2

d. 146.1

Answer #1

A 250 mm diameter of cast iron pipe flows 39.3 L/s of
SAE 10 oil along 500 m length. Given: dynamic viscosity, μ and
density, ρ of SAE 10 oil are 1.04 x 10-1 Ns/m2 and 917 kg/m3
respectively. By assuming the flow is laminar, determine energy
head and pressure loss due to pipe friction using Hagen-Poiseuille
equation and friction factor, f.

Water (ρ = 999 kg/m3, μ = 1.3x10-3 N/s) from a large tank with
P1 flows through a pipeline at the rate of 0.14 m3/s to atmosphere
as shown. The pipe diameter of the entire piping system is 20 cm
and material is cast iron. Knowing discharge velocity V2 is the
same as the flow velocity in the pipe, no discharging nozzle loss,
Kinlet = 0.5, and Kelbow = 1.1, calculate the absolute P1 (MPa) in
the tank needed to...

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