Weight of Hollow Pipe Calculator

Formula

The formula to calculate the weight of a hollow pipe is:

\[ \text{Weight} = \text{Volume} \times \text{Density} \]

Where:

\(\text{Volume} = \text{Area} \times \text{Length}\)
\(\text{Area} = \frac{\pi}{4} (D^2 - d^2)\)
\(D\) is the outer diameter in meters.
\(d\) is the inner diameter in meters.
\(L\) is the length in meters.
\(\rho\) is the density in kg/m³.

Definition

The weight of a hollow pipe is determined by its volume and the density of the material it is made from. The volume is calculated based on the outer and inner diameters and the length of the pipe.

Example Calculation

Let's assume the following values:

Outer Diameter (D) = 100 mm
Inner Diameter (d) = 90 mm
Length (L) = 1 meter
Density (ρ) = 7850 kg/m³ (for mild steel)

Using the formula:

\[ \text{Area} = \frac{\pi}{4} (0.1^2 - 0.09^2) \approx 0.0014915 \, \text{m}^2 \]

\[ \text{Volume} = \text{Area} \times 1 \approx 0.0014915 \, \text{m}^3 \]

\[ \text{Weight} = \text{Volume} \times 7850 \approx 11.70 \, \text{kg} \]

The weight of the hollow pipe is approximately 11.70 kg.

Conversion Chart

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Outer Diameter (D) (mm)	Inner Diameter (d) (mm)	Length (L) (meters)	Density (ρ) (kg/m³)	Weight (kg)