Channel Jacket Thickness Calculator

Channel Wall Thickness Formula:

\[ t_c = d \times \sqrt{\frac{0.12 \times p_j}{f_j}} + c \]

Design Length of Channel Section:

Design Jacket Pressure:

N/mm²

Allowable Stress for Jacket Material:

N/mm²

Corrosion Allowance:

Manufacturing Tolerance:

Channel Wall Thickness: mm

With Tolerance (±5%): mm

1. What is Channel Jacket Thickness Calculator?

Definition: This calculator determines the required wall thickness for channel jackets based on design parameters including pressure, material stress, and corrosion allowance.

Purpose: It helps engineers design pressure vessels and heat exchangers with channel jackets that can withstand operational pressures safely.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ t_c = d \times \sqrt{\frac{0.12 \times p_j}{f_j}} + c \]

Where:

\( t_c \) — Channel wall thickness (mm)
\( d \) — Design length of channel section (mm)
\( p_j \) — Design jacket pressure (N/mm²)
\( f_j \) — Allowable stress for jacket material (N/mm²)
\( c \) — Corrosion allowance (mm)

Explanation: The formula calculates the minimum required thickness considering pressure loading and material strength, with additional allowance for corrosion.

3. Importance of Channel Jacket Thickness Calculation

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

4. Using the Calculator

Tips: Enter all required parameters including design length, jacket pressure, material allowable stress, corrosion allowance, and manufacturing tolerance (default ±5%).

5. Frequently Asked Questions (FAQ)

Q1: What is the purpose of corrosion allowance?
A: Corrosion allowance provides extra material thickness to account for wall thinning due to corrosion over the equipment's design life.

Q2: How is manufacturing tolerance applied?
A: The tolerance (default ±5%) is added to the calculated thickness to account for variations in manufacturing processes.

Q3: What's a typical allowable stress value?
A: Allowable stress varies by material but common values range from 120-250 N/mm² for carbon steels at design temperatures.

Q4: When would I increase the tolerance percentage?
A: Increase tolerance for complex geometries or when manufacturing processes have higher variability.

Q5: Does this calculation meet ASME standards?
A: This is a simplified calculation. For ASME code compliance, refer to Section VIII Division 1 or 2 for complete requirements.