1. What is a Hollow Steel Tube Weight Calculator?

Definition: This calculator estimates the weight of a hollow steel tube based on its dimensions and steel density.

Purpose: It helps engineers, fabricators, and construction professionals determine the weight of hollow steel tubes for design, transportation, and structural calculations.

2. How Does the Calculator Work?

The calculator uses the formulas:

Where:

• \( m \) — Mass of the tube (kg)
• \( V \) — Volume of the tube (cubic units)
• \( \rho \) — Density of steel (kg/m³)
• \( R \) — Outer radius of the tube
• \( r \) — Inner radius of the tube
• \( h \) — Height/length of the tube

Explanation: The calculator first computes the volume by subtracting the inner cylinder from the outer cylinder, then multiplies by steel density to get the mass.

3. Importance of Steel Tube Weight Calculation

Details: Accurate weight calculations are crucial for structural integrity, transportation planning, material cost estimation, and load-bearing capacity assessments.

4. Using the Calculator

Tips: Enter the outer radius (R), inner radius (r), height/length (h), and steel density (default 7850 kg/m³). All values must be positive, and outer radius must be greater than inner radius.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for dimensions?
A: You can use any consistent unit (meters, inches, etc.), but density is in kg/m³. The result will be in kg per cubic [your unit].

Q2: Why is steel density typically 7850 kg/m³?
A: This is the standard density for carbon steel. Different alloys may have slightly different densities.

Q3: How do I calculate for rectangular tubes?
A: This calculator is for cylindrical tubes. For rectangular tubes, use (outer width × outer height - inner width × inner height) × length × density.

Q4: Can I use this for pipes?
A: Yes, this calculation works equally well for pipes, which are essentially hollow cylinders.

Q5: How do I convert the result to pounds?
A: Multiply the result in kg by 2.20462 to get pounds.