Thickness of Skirt in Vessel Calculator ±5%

Thickness of Skirt Formula:

\[ t_{skirt} = \frac{4 \times M_w}{\pi \times D_{sk}^2 \times f_{wb}} \]

Thickness of Skirt in Vessel (m):

1. What is Thickness of Skirt in Vessel?

Definition: The thickness of skirt in a vessel is typically determined by calculating the maximum stress that the skirt is likely to experience and must be sufficient to resist the weight of the vessel.

Purpose: It ensures structural integrity and stability of pressure vessels and storage tanks under various loading conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ t_{skirt} = \frac{4 \times M_w}{\pi \times D_{sk}^2 \times f_{wb}} \]

Where:

\( t_{skirt} \) — Thickness of skirt (meters)
\( M_w \) — Maximum wind moment (Newton-meter)
\( D_{sk} \) — Mean diameter of skirt (meters)
\( f_{wb} \) — Axial bending stress at base of vessel (Pascals)

Explanation: The formula calculates the required skirt thickness to withstand wind loads and bending stresses.

3. Importance of Skirt Thickness Calculation

Details: Proper skirt thickness ensures vessel stability, prevents buckling, and maintains structural integrity under operational and environmental loads.

4. Using the Calculator

Tips: Enter the maximum wind moment, mean diameter of skirt, and axial bending stress at base of vessel. All values must be > 0. Results include ±5% safety factor.

5. Frequently Asked Questions (FAQ)

Q1: Why is the ±5% factor included?
A: The ±5% accounts for material variations, manufacturing tolerances, and safety factors in engineering design.

Q2: What's a typical axial bending stress value?
A: Values typically range from 80-150 MPa, but depend on material properties and design codes.

Q3: How is maximum wind moment determined?
A: It's calculated based on wind speed, vessel height, shape factor, and local wind load standards.

Q4: What materials are vessel skirts made from?
A: Common materials include carbon steel, stainless steel, and other alloys depending on service conditions.

Q5: Does this include corrosion allowance?
A: No, corrosion allowance should be added separately based on expected service life and environment.