Unit Weight of Square Pipe Calculator

Unit Weight Formula:

\[ W = \rho \times (a^2 - b^2) \]

Unit Weight:

kg/m

1. What is Unit Weight of Square Pipe?

Definition: This calculator determines the weight per unit length of a square pipe based on its dimensions and material density.

Purpose: It helps engineers, architects, and construction professionals estimate the weight of square pipes for structural calculations and material planning.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ W = \rho \times (a^2 - b^2) \]

Where:

\( W \) — Weight per unit length (kg/m)
\( \rho \) — Material density (kg/m³)
\( a \) — Outer side length (meters)
\( b \) — Inner side length (meters)

Explanation: The formula calculates the cross-sectional area (outer area minus inner area) and multiplies by material density to get weight per meter.

3. Importance of Unit Weight Calculation

Details: Knowing the unit weight is essential for structural design, load calculations, transportation planning, and cost estimation.

4. Using the Calculator

Tips:

Default density is 7850 kg/m³ (steel)
Enter dimensions in meters
For solid square bars, set inner length to 0
Outer dimension must be larger than inner dimension

5. Frequently Asked Questions (FAQ)

Q1: What's the typical density for steel pipes?
A: Most carbon steels have a density of about 7850 kg/m³. Stainless steel is typically 7930 kg/m³.

Q2: How do I convert the result to pounds per foot?
A: Multiply kg/m by 0.672 to get lb/ft.

Q3: What if my pipe is rectangular rather than square?
A: Use the formula W = ρ × (a×c - b×d) where a,c are outer dimensions and b,d are inner dimensions.

Q4: Why is the inner dimension optional?
A: For solid square bars (not pipes), the inner dimension would be 0.

Q5: How accurate is this calculation?
A: It provides theoretical weight. Actual weight may vary slightly due to manufacturing tolerances.