Question

Estimate the weight of 25 km of gas pipeline, DN = 610 mm and wall thickness = 12.7 mm.

Answer 1

Answer:

Weight = 45880 kN

Explanation:

Gas pipeline material is steel.

Density of steel = 7850 kg/m³

Mass = Volume x Density

Volume = Area x Length

Outer diameter = 610 mm

Internal diameter = 610 - 2 x 12.7 = 584.6 mm

$\texttt{Area}=\frac{\pi}{4}(610^2-584.6^2)=23831.21mm^2=0.0238m^2$

Length = 25 km = 25000 m

Volume = 25000 x 0.0238 = 595.78 m³

Mass = 595.78 x 7850 = 4676875.12 kg

Weight = Mass x Acceleration due to gravity = 4676875.12 x 9.81 = 45880 kN

Weight = 45880 kN