Thickness of Flange Calculator

Thickness of Flange Formula:

\[ t_f = G \times \sqrt{\frac{p}{k \times f}} + c \]

Diameter of Gasket at Load Reaction:

Design Pressure:

Coefficient Value:

Permissible Stress:

Corrosion Allowance:

Thickness of Flange:

1. What is Thickness of Flange Calculator?

Definition: This calculator determines the required thickness of a flange based on gasket diameter, design pressure, material properties, and corrosion allowance.

Purpose: It helps mechanical engineers and designers ensure proper flange thickness for pressure vessel and piping system applications.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ t_f = G \times \sqrt{\frac{p}{k \times f}} + c \]

Where:

\( t_f \) — Thickness of flange (m)
\( G \) — Diameter of gasket at load reaction (m)
\( p \) — Design pressure (Pa)
\( k \) — Coefficient value for thickness of flange (±5%)
\( f \) — Permissible stress (Pa)
\( c \) — Corrosion allowance (m)

Explanation: The formula calculates the minimum required thickness considering pressure loading, material strength, and additional protection against corrosion.

3. Importance of Flange Thickness Calculation

Details: Proper flange thickness ensures structural integrity under pressure, prevents leakage, and accounts for material degradation over time.

4. Using the Calculator

Tips: Enter all required parameters in consistent units. The coefficient value typically ranges from 0.01 to 0.05 (±5%).

5. Frequently Asked Questions (FAQ)

Q1: What is the typical coefficient value range?
A: The coefficient (k) typically ranges from 0.01 to 0.05, with ±5% variation depending on flange type and application.

Q2: How is gasket diameter (G) determined?
A: G is the effective diameter where the gasket load is applied, usually the mean diameter of the gasket contact area.

Q3: Why include corrosion allowance?
A: Corrosion allowance provides extra thickness to account for material loss over the design life of the flange.

Q4: What units should be used?
A: Consistent SI units are recommended (meters for length, Pascals for pressure/stress).

Q5: Does this calculation meet ASME standards?
A: This is a general calculation. For ASME code compliance, refer to ASME BPVC Section VIII Division 1.